Help With DTC's [Archive]

TAQuickness

February 7th, 2006, 01:28 AM

Not sure where to start trouble shooting this one...

I cannot duplicate this problem 100% of the time, but it always occurs under WOT. Did it this morning and these were the codes:

U1016 "Lost Class 2 Communications With Engine Controller - Device $10" H ($28 ) "Traction Control System (TCS) or Electronic Brake Control Module (EBCM)"

U1040 "Lost Communications With Brake/Traction Controller - Device $28" H ($58 ) "Inflatable Restraint Sensing and Diagnostic Module (SDM)"

U1096 "Lost Communications With Driver Information and Displays Controller - Device $60" H ($58 ) "Inflatable Restraint Sensing and Diagnostic Module (SDM)"

U1040 "Lost Communications With Brake/Traction Controller - Device $28" H ($60) "Instrument Panel Cluster (IPC)"

Any Ideas?

joecar

February 7th, 2006, 03:53 AM

DTC U1016 Loss of PCM Class 2 Serial Data Com

The Control Module ID Number list provides a method for determining which module is not communicating. A module with an internal class 2 serial data circuit malfunction or which loses power during the current ignition cycle would have a Lost Communication DTC set by other modules. Use the Control Module ID Number list in order to determine which module is not communicating and the Lost Communications with 1XXX diagnostic table in order to diagnose the malfunction.
<table border="1" width="100%"> <tbody><tr> <th rowspan="1" align="center" valign="bottom">Control Module
</th><th rowspan="1" align="center" valign="bottom">ID Number
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">Powertrain Control Module (PCM)
</td><td rowspan="1" align="center" valign="middle">016
</td></tr> <tr> <td rowspan="1" align="center" valign="middle"> Electronic Brake and Traction Control Module (EBTCM)
</td><td rowspan="1" align="center" valign="middle">040
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Sensing and Diagnostic Module (SDM)
</td><td rowspan="1" align="center" valign="middle">088
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Instrument Panel Cluster (IPC)
</td><td rowspan="1" align="center" valign="middle">096
</td></tr> </tbody></table> (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss1-425105) Circuit Description (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss1-425105)

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring (Node Alive messages). A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module's Node Alive message. Each module on the class 2 serial data circuit which is powered and performing functions that require detection of a communications malfunction is required to send a Node Alive message every two seconds. When no message is detected from a learned identification number for five seconds, a DTC U1xxx (where xxx is equal to the three digit identification number) is set.
(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss2-425105) Conditions for Running the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss2-425105)

Voltage supplied to the module is in the normal operating voltage range (approximately 9 - 16 volts).
Diagnostic trouble codes U1300 and U1301 do not have a current status.
The vehicle power mode (ignition switch position) requires serial data communication to occur. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss3-425105)Conditions for Setting the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss3-425105)

A message from a learned identification number has not been detected for the past five seconds.
(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss4-425105)Conditions for Clearing the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss4-425105)

A current DTC will clear when a Node Alive message from the failed identification number is detected on the class 2 serial data circuit or at the end of the current ignition cycle.
A history DTC will clear upon receipt of a scan tool Clear DTCs command. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss5-425105)Diagnostic Aids (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss5-425105)

An intermittent open between the inoperative module and the star connector may cause this code to set.
A poor connection at the inoperative module or the star connector may cause this code to set.
An intermittent open in the star connector may cause this code to set.
If the module which sets this code is not properly powered this code may set. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss1-425069)Test Description (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#ss1-425069)

A module which loses power during an ignition cycle will cause other module(s) to set Lost Communication DTCs.

The malfunction is due to an open in the class 2 serial data circuit or an open in the module.

The module which was not communicating due to an open in the class 2 serial data circuit may have set Lost Communication DTCs for those modules that it was monitoring.

The modules which can communicate indicate the module which cannot communicate. You must clear the DTC from these modules to avoid future misdiagnosis.

joecar

February 7th, 2006, 03:54 AM

U1016

<table border="1" width="100%"><tbody><tr><th rowspan="1" align="center" valign="bottom">Step
</th><th rowspan="1" align="center" valign="bottom">Action
</th><th rowspan="1" align="center" valign="bottom">Yes
</th><th rowspan="1" align="center" valign="bottom">No
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">1
</td><td rowspan="1" align="left" valign="top">Perform the Diagnostic System Check for the module which does not communicate to ensure that the module is properly powered.
Was a repair made when the Diagnostic System Check was performed?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 2 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S02)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">2
</td><td rowspan="1" align="left" valign="top">
Disconnect the star connector.
Inspect for poor connections/terminal tension at the star connector. Refer to Connector Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61973&RefDoc=425069) .Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 3 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S03)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">3
</td><td rowspan="1" align="left" valign="top">Test the class 2 serial data circuit of the module that is not communicating for an open between the module and the star connector. Refer to Wiring Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61965&RefDoc=425069) .
Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 4 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S04)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">4
</td><td rowspan="1" align="left" valign="top">Inspect for poor connections/terminal tension at the class 2 serial data circuit(s) of the module that is not communicating. Refer to Connector Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61973&RefDoc=425069) .
Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 5 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S05)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">5
</td><td rowspan="1" align="left" valign="top">Replace the module which is not communicating. Refer to the appropriate Repair Instructions for module replacement.
Did you complete the replacement?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 8 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S08)
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">6
</td><td rowspan="1" align="left" valign="top">
Install a scan tool.
Turn on the ignition leaving the engine off.
Select the display DTCs function for the module which was not communicating.Does the scan tool display any DTCs which do not begin with a U?
</td><td rowspan="1" align="center" valign="bottom">Go to the applicable DTC table
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 7 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S07)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">7
</td><td rowspan="1" align="left" valign="top">Clear the DTCs using the scan tool.
Did you complete the action?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 8 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S08)
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">8
</td><td rowspan="1" align="left" valign="top">Select the display DTCs function for the module(s) which had the Lost Communications with XXX DTC set.
Does the scan tool display any DTCs which do not begin with a U?
</td><td rowspan="1" align="center" valign="bottom">Go to the applicable DTC table
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 9 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425105&evc=sm&pubid=101&cellId=10959&mspsdsubkey=1096#S09)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">9
</td><td rowspan="1" align="left" valign="top">
Clear the DTCs using the scan tool.
Continue diagnosing or clearing the DTCs until all the modules have been diagnosed and all the DTCs have been cleared.Did you complete the action?
</td><td rowspan="1" align="center" valign="bottom">System OK
</td><td rowspan="1" align="center" valign="middle">--
</td></tr></tbody></table>

joecar

February 7th, 2006, 03:57 AM

DTC U1040 EBCM Class 2 Serial Data SOH Fault

The Control Module ID Number list provides a method for determining which module is not communicating. A module with an internal class 2 serial data circuit malfunction or which loses power during the current ignition cycle would have a Lost Communication DTC set by other modules. Use the Control Module ID Number list in order to determine which module is not communicating and the Lost Communications with 1XXX diagnostic table in order to diagnose the malfunction.
<table border="1" width="100%"> <tbody><tr> <th rowspan="1" align="center" valign="bottom">Control Module
</th><th rowspan="1" align="center" valign="bottom">ID Number
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">Powertrain Control Module (PCM)
</td><td rowspan="1" align="center" valign="middle">016
</td></tr> <tr> <td rowspan="1" align="center" valign="middle"> Electronic Brake and Traction Control Module (EBTCM)
</td><td rowspan="1" align="center" valign="middle">040
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Sensing and Diagnostic Module (SDM)
</td><td rowspan="1" align="center" valign="middle">088
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Instrument Panel Cluster (IPC)
</td><td rowspan="1" align="center" valign="middle">096
</td></tr> </tbody></table> (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss1-425109) Circuit Description (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss1-425109)

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring (Node Alive messages). A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module's Node Alive message. Each module on the class 2 serial data circuit which is powered and performing functions that require detection of a communications malfunction is required to send a Node Alive message every two seconds. When no message is detected from a learned identification number for five seconds, a DTC U1xxx (where xxx is equal to the three digit identification number) is set.
(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss2-425109) Conditions for Running the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss2-425109)

Voltage supplied to the module is in the normal operating voltage range (approximately 9 - 16 volts).
Diagnostic trouble codes U1300 and U1301 do not have a current status.
The vehicle power mode (ignition switch position) requires serial data communication to occur. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss3-425109)Conditions for Setting the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss3-425109)

A message from a learned identification number has not been detected for the past five seconds.
(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss4-425109)Conditions for Clearing the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss4-425109)

A current DTC will clear when a Node Alive message from the failed identification number is detected on the class 2 serial data circuit or at the end of the current ignition cycle.
A history DTC will clear upon receipt of a scan tool Clear DTCs command. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss5-425109)Diagnostic Aids (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss5-425109)

An intermittent open between the inoperative module and the star connector may cause this code to set.
A poor connection at the inoperative module or the star connector may cause this code to set.
An intermittent open in the star connector may cause this code to set.
If the module which sets this code is not properly powered this code may set. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss1-425069)Test Description (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#ss1-425069)

A module which loses power during an ignition cycle will cause other module(s) to set Lost Communication DTCs.

The malfunction is due to an open in the class 2 serial data circuit or an open in the module.

The module which was not communicating due to an open in the class 2 serial data circuit may have set Lost Communication DTCs for those modules that it was monitoring.

The modules which can communicate indicate the module which cannot communicate. You must clear the DTC from these modules to avoid future misdiagnosis.

joecar

February 7th, 2006, 03:57 AM

U1040

<table border="1" width="100%"><tbody><tr><th rowspan="1" align="center" valign="bottom"> Step
</th><th rowspan="1" align="center" valign="bottom">Action
</th><th rowspan="1" align="center" valign="bottom">Yes
</th><th rowspan="1" align="center" valign="bottom">No
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">1
</td><td rowspan="1" align="left" valign="top">Perform the Diagnostic System Check for the module which does not communicate to ensure that the module is properly powered.
Was a repair made when the Diagnostic System Check was performed?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 2 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S02)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">2
</td><td rowspan="1" align="left" valign="top">
Disconnect the star connector.
Inspect for poor connections/terminal tension at the star connector. Refer to Connector Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61973&RefDoc=425069) . Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 3 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S03)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">3
</td><td rowspan="1" align="left" valign="top">Test the class 2 serial data circuit of the module that is not communicating for an open between the module and the star connector. Refer to Wiring Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61965&RefDoc=425069) .
Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 4 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S04)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">4
</td><td rowspan="1" align="left" valign="top">Inspect for poor connections/terminal tension at the class 2 serial data circuit(s) of the module that is not communicating. Refer to Connector Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61973&RefDoc=425069) .
Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 5 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S05)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">5
</td><td rowspan="1" align="left" valign="top">Replace the module which is not communicating. Refer to the appropriate Repair Instructions for module replacement.
Did you complete the replacement?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 8 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S08)
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">6
</td><td rowspan="1" align="left" valign="top">
Install a scan tool.
Turn on the ignition leaving the engine off.
Select the display DTCs function for the module which was not communicating. Does the scan tool display any DTCs which do not begin with a U?
</td><td rowspan="1" align="center" valign="bottom">Go to the applicable DTC table
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 7 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S07)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">7
</td><td rowspan="1" align="left" valign="top">Clear the DTCs using the scan tool.
Did you complete the action?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 8 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S08)
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">8
</td><td rowspan="1" align="left" valign="top">Select the display DTCs function for the module(s) which had the Lost Communications with XXX DTC set.
Does the scan tool display any DTCs which do not begin with a U?
</td><td rowspan="1" align="center" valign="bottom">Go to the applicable DTC table
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 9 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425109&evc=sm&pubid=101&cellId=10990&mspsdsubkey=1096#S09)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">9
</td><td rowspan="1" align="left" valign="top">
Clear the DTCs using the scan tool.
Continue diagnosing or clearing the DTCs until all the modules have been diagnosed and all the DTCs have been cleared. Did you complete the action?
</td><td rowspan="1" align="center" valign="bottom">System OK
</td><td rowspan="1" align="center" valign="middle">--
</td></tr></tbody></table>

joecar

February 7th, 2006, 03:59 AM

DTC U1096 IPC Class 2 Serial Data SOH Fault

The Control Module ID Number list provides a method for determining which module is not communicating. A module with an internal class 2 serial data circuit malfunction or which loses power during the current ignition cycle would have a Lost Communication DTC set by other modules. Use the Control Module ID Number list in order to determine which module is not communicating and the Lost Communications with 1XXX diagnostic table in order to diagnose the malfunction.
<table border="1" width="100%"> <tbody><tr> <th rowspan="1" align="center" valign="bottom">Control Module
</th><th rowspan="1" align="center" valign="bottom">ID Number
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">Powertrain Control Module (PCM)
</td><td rowspan="1" align="center" valign="middle">016
</td></tr> <tr> <td rowspan="1" align="center" valign="middle"> Electronic Brake and Traction Control Module (EBTCM)
</td><td rowspan="1" align="center" valign="middle">040
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Sensing and Diagnostic Module (SDM)
</td><td rowspan="1" align="center" valign="middle">088
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Instrument Panel Cluster (IPC)
</td><td rowspan="1" align="center" valign="middle">096
</td></tr> </tbody></table> (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss1-425118) Circuit Description (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss1-425118)

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring (Node Alive messages). A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module's Node Alive message. Each module on the class 2 serial data circuit which is powered and performing functions that require detection of a communications malfunction is required to send a Node Alive message every two seconds. When no message is detected from a learned identification number for five seconds, a DTC U1xxx (where xxx is equal to the three digit identification number) is set.
(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss2-425118) Conditions for Running the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss2-425118)

Voltage supplied to the module is in the normal operating voltage range (approximately 9 - 16 volts).
Diagnostic trouble codes U1300 and U1301 do not have a current status.
The vehicle power mode (ignition switch position) requires serial data communication to occur. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss3-425118)Conditions for Setting the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss3-425118)

A message from a learned identification number has not been detected for the past five seconds.
(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss4-425118)Conditions for Clearing the DTC (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss4-425118)

A current DTC will clear when a Node Alive message from the failed identification number is detected on the class 2 serial data circuit or at the end of the current ignition cycle.
A history DTC will clear upon receipt of a scan tool Clear DTCs command. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss5-425118)Diagnostic Aids (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss5-425118)

An intermittent open between the inoperative module and the star connector may cause this code to set.
A poor connection at the inoperative module or the star connector may cause this code to set.
An intermittent open in the star connector may cause this code to set.
If the module which sets this code is not properly powered this code may set. (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss1-425069)Test Description (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#ss1-425069)

A module which loses power during an ignition cycle will cause other module(s) to set Lost Communication DTCs.

The malfunction is due to an open in the class 2 serial data circuit or an open in the module.

The module which was not communicating due to an open in the class 2 serial data circuit may have set Lost Communication DTCs for those modules that it was monitoring.

The modules which can communicate indicate the module which cannot communicate. You must clear the DTC from these modules to avoid future misdiagnosis.

joecar

February 7th, 2006, 04:00 AM

U1096

<table border="1" width="100%"><tbody><tr><th rowspan="1" align="center" valign="bottom"> Step
</th><th rowspan="1" align="center" valign="bottom">Action
</th><th rowspan="1" align="center" valign="bottom">Yes
</th><th rowspan="1" align="center" valign="bottom">No
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">1
</td><td rowspan="1" align="left" valign="top">Perform the Diagnostic System Check for the module which does not communicate to ensure that the module is properly powered.
Was a repair made when the Diagnostic System Check was performed?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 2 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S02)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">2
</td><td rowspan="1" align="left" valign="top">
Disconnect the star connector.
Inspect for poor connections/terminal tension at the star connector. Refer to Connector Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61973&RefDoc=425069) . Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 3 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S03)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">3
</td><td rowspan="1" align="left" valign="top">Test the class 2 serial data circuit of the module that is not communicating for an open between the module and the star connector. Refer to Wiring Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61965&RefDoc=425069) .
Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 4 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S04)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">4
</td><td rowspan="1" align="left" valign="top">Inspect for poor connections/terminal tension at the class 2 serial data circuit(s) of the module that is not communicating. Refer to Connector Repairs (http://127.0.0.1:9001/servlets/CellHandler?CellId=61973&RefDoc=425069) .
Did you find and correct the condition?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S06)
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 5 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S05)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">5
</td><td rowspan="1" align="left" valign="top">Replace the module which is not communicating. Refer to the appropriate Repair Instructions for module replacement.
Did you complete the replacement?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 8 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S08)
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">6
</td><td rowspan="1" align="left" valign="top">
Install a scan tool.
Turn on the ignition leaving the engine off.
Select the display DTCs function for the module which was not communicating. Does the scan tool display any DTCs which do not begin with a U?
</td><td rowspan="1" align="center" valign="bottom">Go to the applicable DTC table
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 7 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S07)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">7
</td><td rowspan="1" align="left" valign="top">Clear the DTCs using the scan tool.
Did you complete the action?
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 8 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S08)
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">8
</td><td rowspan="1" align="left" valign="top">Select the display DTCs function for the module(s) which had the Lost Communications with XXX DTC set.
Does the scan tool display any DTCs which do not begin with a U?
</td><td rowspan="1" align="center" valign="bottom">Go to the applicable DTC table
</td><td rowspan="1" align="center" valign="bottom"> Go to Step 9 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=425118&evc=sm&pubid=101&cellId=10992&mspsdsubkey=1096#S09)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">9
</td><td rowspan="1" align="left" valign="top">
Clear the DTCs using the scan tool.
Continue diagnosing or clearing the DTCs until all the modules have been diagnosed and all the DTCs have been cleared. Did you complete the action?
</td><td rowspan="1" align="center" valign="bottom">System OK
</td><td rowspan="1" align="center" valign="middle">--
</td></tr></tbody></table>

joecar

February 7th, 2006, 04:04 AM

TA,
I had to split each one due to the 10000 character post limit.
Those are from the pages for 1999 F-body, is that your year, if not I can edit my posts.
Don't follow the links embedded within the pages.
Keep in mind that these are GM written instructions and have been known to possibly contain strange steps or be otherwise incomplete.
Hope this helps,
Joe

joecar

February 7th, 2006, 04:14 AM

Wire diagram...

Black02SS

February 7th, 2006, 05:59 AM

WOW. Thats a reply. Talk about informative.

:cheers:

TAQuickness

February 7th, 2006, 06:26 AM

Thanks Joe!

Can't wait to figure out the cause of this problem. It does make for interesting bragging rights though.

joecar

February 7th, 2006, 07:36 AM

This one's hard because it happens while vehicle is moving (WOT)... :bawl:
Must be worth about 10,000 bonus BR points when you nail it... :cheers:

joecar

February 7th, 2006, 07:39 AM

WOW. Thats a reply. Talk about informative.

:cheers:
Thanks mate.
:cheers:

joecar

February 7th, 2006, 07:19 PM

I found more info on my Helm's:

Data Link Communications Circuit Description

(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=415741&evc=sm&pubid=101&cellId=11002&mspsdsubkey=1096#ss1-415741)Data Link Connector (DLC) (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=415741&evc=sm&pubid=101&cellId=11002&mspsdsubkey=1096#ss1-415741)

The data link connector (DLC) contains the class 2 serial data links:
The DLC also provides a power source for the scan tool as follows:

Unswitched voltage (B+) at DLC terminal 16 (circuit 540)
Ground at terminal 4 (circuit 650) and terminal 5 (circuit 451) (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=415741&evc=sm&pubid=101&cellId=11002&mspsdsubkey=1096#ss2-415741)Class 2 Serial Data Link (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=415741&evc=sm&pubid=101&cellId=11002&mspsdsubkey=1096#ss2-415741)

The class 2 serial data link allows the following modules to communicate data with each other:

Electronic brake/traction control module (EBTCM)
Instrument panel cluster (IPC)
Powertrain control module (PCM)
Inflatable Restraint Sensing and Diagnostic Module (SDM). The Class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes. The Class 2 serial data link is located at the DLC connector terminal 2. Terminal 2 consists of the following circuits:

Circuit 1036
Circuit 1128
Circuit 1049
Circuit 1122
Circuit 1132

joecar

February 7th, 2006, 07:22 PM

Data Link Communications Components

<table style="width: 848px; height: 936px;" border="1"><tbody><tr> <th rowspan="1" align="center" valign="bottom"> Name
</th><th rowspan="1" align="center" valign="bottom">Location
</th><th rowspan="1" align="center" valign="bottom">Locator View
</th><th rowspan="1" align="center" valign="bottom">Connector End View
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">Data Link Conn (DLC)
</td><td rowspan="1" align="left" valign="middle">Under the IP, right of the steering column
</td><td rowspan="1" align="center" valign="middle"> Data Link Communications Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=10962&RefDoc=415737)
</td><td rowspan="1" align="center" valign="middle"> Data Link Communications Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=10884&RefDoc=415737)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Electronic Brake Control Module (EBCM)
</td><td rowspan="1" align="left" valign="middle">Mounted with brake pressure modulator valve on the top of the left front frame rail
</td><td rowspan="1" align="center" valign="middle"> ABS Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=1206&RefDoc=415737) in ABS Traction Control
</td><td rowspan="1" align="center" valign="middle"> ABS Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=947&RefDoc=415737) in ABS Traction Control
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Inflatable Restraint Sensing and Diagnostic Module (SDM)
</td><td rowspan="1" align="left" valign="middle">On the floor tunnel, below the rear of the console
</td><td rowspan="1" align="center" valign="middle"> Hydraulic Brakes Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=50206&RefDoc=415737) in Hydraulic Brakes
</td><td rowspan="1" align="center" valign="middle"> SIR Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=57511&RefDoc=415737) in SIR
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Instrument Cluster
</td><td rowspan="1" align="left" valign="middle">On the left side of the IP
</td><td rowspan="1" align="center" valign="middle"> Instrument Panel, Gages, and Console Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=50848&RefDoc=415737) in Instrument Cluster, Gages and Console
</td><td rowspan="1" align="center" valign="middle"> Instrument Panel, Gages, and Console Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=50850&RefDoc=415737) in Instrument Panel, Gages, and Console
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">IP Fuse Block
</td><td rowspan="1" align="left" valign="middle">On the left end of the IP carrier
</td><td rowspan="1" align="center" valign="middle"> Instrument Panel, Gages, and Console Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=50848&RefDoc=415737) in Instrument Cluster, Gauges and Console
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Powertrain Control Module (PCM) (V8 VIN G)
</td><td rowspan="1" align="left" valign="middle">On the right side of the engine compartment, rear of the wheelhouse
</td><td rowspan="1" align="center" valign="middle"> Engine Controls Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=32517&RefDoc=415737) in Engine Controls
</td><td rowspan="1" align="center" valign="middle"> Powertrain Control Module (PCM) Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=32607&RefDoc=415737) in Engine Controls
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Star Connector
</td><td rowspan="1" align="left" valign="middle">Under the left side of the IP, near the DLC
</td><td rowspan="1" align="center" valign="middle"> Lighting Systems Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=52678&RefDoc=415737) in Lighting Systems
</td><td rowspan="1" align="center" valign="middle">--
</td></tr></tbody></table>

joecar

February 7th, 2006, 07:22 PM

Continued...

<table border="1" width="100%"><tbody> <tr> <td rowspan="1" align="center" valign="middle">C200D (48 cavities)
</td><td rowspan="1" align="left" valign="middle">Part of the IP harness, between the left kick panel and the steering column
</td><td rowspan="1" align="center" valign="middle"> Harness Routing Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62032&RefDoc=415737) in Wiring Systems
</td><td rowspan="1" align="center" valign="middle"> Inline Harness Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62129&RefDoc=415737) in Wiring Systems
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">C220 (10 cavities)
</td><td rowspan="1" align="left" valign="middle">IP to engine harness, under the right side of the IP, behind the knee bolster
</td><td rowspan="1" align="center" valign="middle"> Harness Routing Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62032&RefDoc=415737) in Wiring Systems
</td><td rowspan="1" align="center" valign="middle"> Inline Harness Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62129&RefDoc=415737) in Wiring Systems
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">C230 (10 cavities)
</td><td rowspan="1" align="left" valign="middle">IP to engine harness, under the right side of the IP, behind the knee bolster
</td><td rowspan="1" align="center" valign="middle"> Harness Routing Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62032&RefDoc=415737) in Wiring Systems
</td><td rowspan="1" align="center" valign="middle"> Inline Harness Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62129&RefDoc=415737) in Wiring Systems
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G110 (V8 VIN G)
</td><td rowspan="1" align="left" valign="middle">Attached to the rear of the left cylinder head
</td><td rowspan="1" align="center" valign="middle"> Harness Routing Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62032&RefDoc=415737) in Wiring Systems
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G200
</td><td rowspan="1" align="left" valign="middle">Near the left A-pillar, bolted to the IP mounting stud behind the kick panel
</td><td rowspan="1" align="center" valign="middle"> Harness Routing Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=62032&RefDoc=415737) in Wiring Systems
</td><td rowspan="1" align="center" valign="middle">--
</td></tr> </tbody></table> <hr>

TAQuickness

February 8th, 2006, 01:47 AM

Joe - If it's not too much trouble, could you post the info at the other end of the following hyper links? Thanks

</td></tr> <tr> <td rowspan="1" align="center" valign="middle">Electronic Brake Control Module (EBCM)
</td><td rowspan="1" align="left" valign="middle">Mounted with brake pressure modulator valve on the top of the left front frame rail
</td><td rowspan="1" align="center" valign="middle"> ABS Component Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=1206&RefDoc=415737) in ABS Traction Control
</td><td rowspan="1" align="center" valign="middle"> ABS Connector End Views (http://127.0.0.1:9001/servlets/CellHandler?CellId=947&RefDoc=415737) in ABS Traction Control

joecar

February 8th, 2006, 04:50 AM

ABS Component Views

<table><tbody><tr><td>Figure 1: </td><td> Center of I/P - Chevy (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375796)</td></tr> <tr><td>Figure 2: </td><td>Accelerator and servo control module (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375801)</td></tr> <tr><td>Figure 3: </td><td>Front wheel speed sensor (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375794)</td></tr> <tr><td>Figure 4: </td><td>Left front frame rail (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375805)</td></tr> <tr><td>Figure 5: </td><td>Right side of auto trans - V6 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375803)</td></tr> <tr><td>Figure 6: </td><td>Left side of manual trans - V8 (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375807)</td></tr> <tr><td>Figure 7: </td><td>Rear axle (speed Sensors) (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375792)</td></tr> <tr><td>Figure 8: </td><td>Top of rear axle (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=375790)</td></tr> </tbody></table> <hr>
Which of these do you want expanded...?

These show the named component location in vehicle.

Don't follow the links.

joecar

February 8th, 2006, 04:51 AM

ABS Connector End Views

<table><tbody><tr><td>Table 1:</td><td> Accelerator Control and Adjuster (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab1-390090)</td></tr> <tr><td>Table 2:</td><td> Accelerator and Servo Control Module (ASM) (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab2-390090)</td></tr> <tr><td>Table 3:</td><td> Electronic Brake Control Module (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab3-390090)</td></tr> <tr><td>Table 4:</td><td> Traction Control Switch (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab4-390090)</td></tr> <tr><td>Table 5:</td><td> Wheel Speed Sensor, Left Front (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab5-390090)</td></tr> <tr><td>Table 6:</td><td> Wheel Speed Sensor, Left Rear (With NW9) (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab6-390090)</td></tr> <tr><td>Table 7:</td><td> Wheel Speed Sensor, Right Front (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab7-390090)</td></tr> <tr><td>Table 8:</td><td> Wheel Speed Sensor, Right Rear (With NW9) (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab8-390090)</td></tr> <tr><td>Table 9:</td><td> Wheel Speed Sensor, Rear (Without NW9) (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab9-390090)</td></tr> </tbody></table>
Which of these do you want expanded...?

These show connector views with pinouts.

joecar

February 8th, 2006, 04:52 AM

TAQuickness,

I'm guessing you need EBCM pinouts....

Electronic Brake Control Module

(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab3-390090) <table border="1" width="100%"><tbody><tr> <th rowspan="1" colspan="4" align="center" valign="middle">
Connector end view diagram goes here, see attachment

</th></tr> <tr> <th rowspan="1" colspan="2" align="center" valign="middle">Connector Part Information
</th><th rowspan="1" colspan="2" align="left" valign="top">
1532-6390
30 Way F GT 150 Series Sealed (BLK)</th></tr> <tr> <th rowspan="1" align="center" valign="bottom">Pin
</th><th rowspan="1" align="center" valign="bottom">Wire Color
</th><th rowspan="1" align="center" valign="bottom">Circuit No.
</th><th rowspan="1" align="center" valign="bottom">Function
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">1
</td><td rowspan="1" align="center" valign="middle">BRN
</td><td rowspan="1" align="center" valign="middle">882
</td><td rowspan="1" align="left" valign="top">Right rear wheel speed sensor signal (LS1 with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">2
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">3
</td><td rowspan="1" align="center" valign="middle">DK GRN
</td><td rowspan="1" align="center" valign="middle">872
</td><td rowspan="1" align="left" valign="top">Right front wheel speed sensor signal (LS1 without NW9 and L36)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">3
</td><td rowspan="1" align="center" valign="middle">WHT
</td><td rowspan="1" align="center" valign="middle">883
</td><td rowspan="1" align="left" valign="top">Right rear wheel speed sensor return
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">4
</td><td rowspan="1" align="center" valign="middle">DK GRN
</td><td rowspan="1" align="center" valign="middle">872
</td><td rowspan="1" align="left" valign="top">Right front wheel speed sensor signal (LSI with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">5
</td><td rowspan="1" align="center" valign="middle">TAN
</td><td rowspan="1" align="center" valign="middle">833
</td><td rowspan="1" align="left" valign="top">Right front wheel speed sensor return
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">6
</td><td rowspan="1" align="center" valign="middle">LT BLU
</td><td rowspan="1" align="center" valign="middle">20
</td><td rowspan="1" align="left" valign="top">Stop lamp feed
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">7
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">8
</td><td rowspan="1" align="center" valign="middle">PNK
</td><td rowspan="1" align="center" valign="middle">739
</td><td rowspan="1" align="left" valign="top">Fused ignition feed
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">9
</td><td rowspan="1" align="center" valign="middle">TAN/BLK
</td><td rowspan="1" align="center" valign="middle">464
</td><td rowspan="1" align="left" valign="top">Delivered torque input (with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">10
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">11
</td><td rowspan="1" align="center" valign="middle">WHT
</td><td rowspan="1" align="center" valign="middle">121
</td><td rowspan="1" align="left" valign="top">Tachometer input (with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">12
</td><td rowspan="1" align="center" valign="middle">BLK
</td><td rowspan="1" align="center" valign="middle">150
</td><td rowspan="1" align="left" valign="top">Ground
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">13
</td><td rowspan="1" align="center" valign="middle">RED
</td><td rowspan="1" align="center" valign="middle">302
</td><td rowspan="1" align="left" valign="top">Fused battery feed
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">14
</td><td rowspan="1" align="center" valign="middle">ORN
</td><td rowspan="1" align="center" valign="middle">440
</td><td rowspan="1" align="left" valign="top">Fused battery feed
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">15
</td><td rowspan="1" align="center" valign="middle">BLK
</td><td rowspan="1" align="center" valign="middle">651
</td><td rowspan="1" align="left" valign="top">Ground
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">16
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">17
</td><td rowspan="1" align="center" valign="middle">BRN/WHT
</td><td rowspan="1" align="center" valign="middle">1571
</td><td rowspan="1" align="left" valign="top">Traction control switch signal (with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">18
</td><td rowspan="1" align="center" valign="middle">PPL/WHT
</td><td rowspan="1" align="center" valign="middle">1572
</td><td rowspan="1" align="left" valign="top">Traction control lamp control
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">19
</td><td rowspan="1" align="center" valign="middle">GRY/BLK
</td><td rowspan="1" align="center" valign="middle">1687
</td><td rowspan="1" align="left" valign="top">TCS spark retard signal (LS1 with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">20
</td><td rowspan="1" align="center" valign="middle">LT BLU
</td><td rowspan="1" align="center" valign="middle">830
</td><td rowspan="1" align="left" valign="top">Left front wheel speed sensor signal
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">21
</td><td rowspan="1" align="center" valign="middle">YEL
</td><td rowspan="1" align="center" valign="middle">873
</td><td rowspan="1" align="left" valign="top">Left front wheel speed sensor return
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">22
</td><td rowspan="1" align="center" valign="middle">BLK
</td><td rowspan="1" align="center" valign="middle">884
</td><td rowspan="1" align="left" valign="top">Rear wheel speed sensor signal (LS1 without NW9 and L36)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">22
</td><td rowspan="1" align="center" valign="middle">BLK
</td><td rowspan="1" align="center" valign="middle">884
</td><td rowspan="1" align="left" valign="top">Left rear wheel speed sensor signal (LS1 with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">23
</td><td rowspan="1" align="center" valign="middle">RED
</td><td rowspan="1" align="center" valign="middle">885
</td><td rowspan="1" align="left" valign="top">Rear wheel speed sensor return (LS1 without NW9 and L36)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">23
</td><td rowspan="1" align="center" valign="middle">RED
</td><td rowspan="1" align="center" valign="middle">885
</td><td rowspan="1" align="left" valign="top">Left rear wheel speed sensor signal (LS1 with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">24
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">25
</td><td rowspan="1" align="center" valign="middle">LT BLU
</td><td rowspan="1" align="center" valign="middle">1122
</td><td rowspan="1" align="left" valign="top">Class 2 serial data
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">26
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">27
</td><td rowspan="1" align="center" valign="middle">ORN/BLK
</td><td rowspan="1" align="center" valign="middle">463
</td><td rowspan="1" align="left" valign="top">Requested torque input (with NW9)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">28-30
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr></tbody></table>

joecar

February 8th, 2006, 05:07 AM

TA, you may also need the ABS schematics since these show the EBCM wires...

Cheers
Joe
:cheers:

TAQuickness

February 8th, 2006, 09:51 AM

TAQuickness

February 8th, 2006, 09:53 AM

Or better yet, can you tell me where I can get a copy of the documentation you have?

joecar

February 8th, 2006, 10:10 AM

www.helminc.com (http://www.helminc.com) sells the paper and CD/DVD manuals.

In 2003 I got the 2003 GM ('96-'03) CD and it was $300.
The current one they have is the 2005 DVD ('98-'05) and it's $400 (price went up).

If you got more than one GM car and you do your own car work, this is actually very cost effective since it contains all the manuals for all the GM cars in the years specified ('98-'05); you can see that the information contained in these is very extensive.

http://www.helminc.com/helm/product2.asp?class%5F2=PON&mk=Pontiac&yr=1999&md=Firebird&dt=Shop%2FService+Information&module=&from=result&Style=&Sku=V200503DVDRETAI&itemtype=N&mscsid=3TMMMJHJMB049PT251C9WNMV4PQK02M2

Edit: this covers all North American GM vehicles

joecar

February 8th, 2006, 10:20 AM

WOW Table 3 and Table 4 I believe. The EBCM pinout looks like it will be very helpful as well. Thanks No worries, I'll do this later tonite (my GM CD is installed on my PC at home).

Oh, I just realized the EBCM pinouts is Table 3, see bottom of thread page 2
:cheers:

joecar

February 9th, 2006, 03:40 AM

Sorry, I got home very late last night...

Here is Table 4 "Traction Control Switch"...

Cheers
Joe
:cheers:

Traction Control Switch

(http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=390090&pubid=101&cellId=947#tab4-390090) <table border="1" width="100%"><tbody><tr> <th rowspan="1" colspan="4" align="center" valign="middle">
Connector diagram, see attachment

</th></tr> <tr> <th rowspan="1" colspan="2" align="center" valign="middle">Connector Part Information
</th><th rowspan="1" colspan="2" align="left" valign="top">
1217-7195
6 Way F Metri-Pack 150 Series (BLK)</th></tr> <tr> <th rowspan="1" align="center" valign="bottom">Pin
</th><th rowspan="1" align="center" valign="bottom">Wire Color
</th><th rowspan="1" align="center" valign="bottom">Circuit No.
</th><th rowspan="1" align="center" valign="bottom">Function
</th></tr> <tr> <td rowspan="1" align="center" valign="middle">A
</td><td rowspan="1" align="center" valign="middle">PPL/WHT
</td><td rowspan="1" align="center" valign="middle">1572
</td><td rowspan="1" align="left" valign="top">Traction control lamp control
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">B
</td><td rowspan="1" align="center" valign="middle">BRN
</td><td rowspan="1" align="center" valign="middle">141
</td><td rowspan="1" align="left" valign="top">Fused ignition feed
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">C
</td><td rowspan="1" align="center" valign="middle">GRY
</td><td rowspan="1" align="center" valign="middle">8
</td><td rowspan="1" align="left" valign="top">Switch illumination lamp feed
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">D
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="center" valign="middle">--
</td><td rowspan="1" align="left" valign="top">Not used
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">E
</td><td rowspan="1" align="center" valign="middle">BRN/WHT
</td><td rowspan="1" align="center" valign="middle">1571
</td><td rowspan="1" align="left" valign="top">Traction control switch signal
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">F
</td><td rowspan="1" align="center" valign="middle">BLK/WHT
</td><td rowspan="1" align="center" valign="middle">451
</td><td rowspan="1" align="left" valign="top">Ground
</td></tr></tbody></table>

TAQuickness

February 9th, 2006, 09:20 AM

Thanks again Joe. This is a great help

TAQuickness

February 11th, 2006, 06:37 AM

Think i found it. Battery died on me, and with the new battery installed, I noticed it was very easy for it to hit the TCS module under WOT. This should get it all fixed up:

http://70.116.105.79/efilive/batcvr/sDSC03300.JPG (http://70.116.105.79/efilive/batcvr/DSC03300.JPG)http://70.116.105.79/efilive/batcvr/sDSC03298.JPG (http://70.116.105.79/efilive/batcvr/DSC03298.JPG)

joecar

February 11th, 2006, 07:24 AM

Think i found it. Battery died on me, and with the new battery installed, I noticed it was very easy for it to hit the TCS module under WOT. This should get it all fixed up:

You mean the battery moved and hit the TCS module (where the throttle cable goes to) at WOT....?

Good work mate, that plate on top holds it down, nice flat surface for resting tools or oil bottles when working on engine.

Cheers
Joe
:cheers:

TAQuickness

February 11th, 2006, 08:20 AM

You mean the battery moved and hit the TCS module (where the throttle cable goes to) at WOT....?

Good work mate, that plate on top holds it down, nice flat surface for resting tools or oil bottles when working on engine.

Cheers
Joe
:cheers:

As a matter of fact, I just cleaned and re-oiled the filters and was marveling at the handy table under the hood.

Also just returned from a :Eyecrazy: run down the BW8 and could not duplicate the problem.

Thanks again for all the info you posted Joe. It's slowly but surely making it's way into my archives ;)

TAQuickness

March 18th, 2006, 01:23 AM

this is frustrating. seems the battery tipping was one part of the problem, however, it has been getting worse. Thanks for posting the pin-outs Joe. While I was wondering where to start, again, I notices I had a no-so-adequate ground on the EBCM. Fixed it up, no time for a test drive.

joecar

March 18th, 2006, 04:34 AM

...I notices I had a no-so-adequate ground on the EBCM. Fixed it up, no time for a test drive.
showpost.php?p=17864&postcount=21 (http://forum.efilive.com/showpost.php?p=17864&postcount=21)

Which ground was it...?
was it G101 or G106 in the first diagram...?
was it G102 in the third diagram...?

joecar

March 18th, 2006, 04:36 AM

Here's a list of grounds on the F-bird...

<table border="1" width="100%"><tbody><tr><td rowspan="1" align="center" valign="middle">G100 (V6 VIN K)
</td><td rowspan="1" align="left" valign="middle">On the lower right side of the engine, above the A/C compressor
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G100 (V8 VIN G)
</td><td rowspan="1" align="left" valign="middle">On the lower right side of the engine, above the starter solenoid
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G101
</td><td rowspan="1" align="left" valign="middle">In the engine compartment, attached to the front of the left wheelhouse
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G102
</td><td rowspan="1" align="left" valign="middle">In the engine compartment, attached to the front of the right wheelhouse
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G105
</td><td rowspan="1" align="left" valign="middle">Attached to the top right side of the radiator support
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G106
</td><td rowspan="1" align="left" valign="middle">Attached to the top left side of the radiator support
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G109
</td><td rowspan="1" align="left" valign="middle">Attached to the left front frame rail, forward of the brake pressure modulator valve bracket
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G110 (V6 VIN K)
</td><td rowspan="1" align="left" valign="middle">In the front of the engine, bolted to the pulley above the A/C clutch connector
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G110 (V8 VIN G)
</td><td rowspan="1" align="left" valign="middle">Attached to the rear of the left cylinder head
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G111 (V6 VIN K)
</td><td rowspan="1" align="left" valign="middle">Attached to the left engine mount
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G111 (V8 VIN G)
</td><td rowspan="1" align="left" valign="middle">Attached to the lower left side of the engine, behind the generator
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G112
</td><td rowspan="1" align="left" valign="middle">Attached to the rear of the left cylinder head
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G200
</td><td rowspan="1" align="left" valign="middle">Near the left A-pillar, bolted to the IP mounting stud behind the kick panel
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G201
</td><td rowspan="1" align="left" valign="middle">Near the right A-pillar, bolted to the IP mounting stud behind the kick panel
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G202
</td><td rowspan="1" align="left" valign="middle">Attached to the floor pan under the center console, rear of the inflatable restraint sensing and diagnostic module (SDM)
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G305
</td><td rowspan="1" align="left" valign="middle">Bolted to the left rocker panel at the floor pan bar
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G310
</td><td rowspan="1" align="left" valign="middle">Bolted to the roof, left of the dome lamp
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G320
</td><td rowspan="1" align="left" valign="middle">Bolted to the roof, left of the dome lamp
</td></tr> <tr> <td rowspan="1" align="center" valign="middle">G400
</td><td rowspan="1" align="left" valign="middle">Bolted to the rear compartment lid release actuator bracket in the rear compartment
</td></tr> </tbody></table>

joecar

March 18th, 2006, 04:48 AM

this is frustrating. seems the battery tipping was one part of the problem, however, it has been getting worse. Check the wiring coming from the EBCM connector for damage/rubbing, check this connector for damage, check the socket for bent pins, especially pins 25, 15 and 12.

showpost.php?p=17863&postcount=20 (http://forum.efilive.com/showpost.php?p=17863&postcount=20)

I hate when stuff like this happens....:bawl:

I would be nice to have a bi-directional scan tool for the EBCM, it would make this sort of thing easier to troubleshoot.
:wave:

TAQuickness

April 19th, 2006, 02:36 AM

Interesting find.

Seems part of the problem was having the LC1's draw power from the BxS2 heater wires.

Since correcting this, I'm still getting an occasional twitch on the speedo... It never ends.

joecar

April 19th, 2006, 07:23 AM

Seems part of the problem was having the LC1's draw power from the BxS2 heater wires.Did you get rid of your BxS2's...?
I'm wonderig just how much current the LC-1 draws...?

Tordne

April 19th, 2006, 07:31 AM

88 MPH...

Has someone got a speeding ticket recently :)

joecar

April 19th, 2006, 08:28 AM

Has someone got a speeding ticket recently :):D No, that's the MPH required for time travel ("BttF"). :D

I know the traps along my commute.

Tordne

April 19th, 2006, 08:33 AM

:D No, that's the MPH required for time travel ("BttF"). :D

I know the traps along my commute.

I see, talking about the Flux Capacitor again :). I passed on that link to the site that Andy now has links to all his mods. Is really well done for a piss take.

I wish the weather forecasting was as accurate as in Back to the Future ;)

TAQuickness

April 19th, 2006, 08:55 AM

Did you get rid of your BxS2's...?
I'm wonderig just how much current the LC-1 draws...?

!NB's all the way around. I've tried everything I know to try so far with no luck. I keep pushing it hoping the weak link will eventually break.

joecar

April 19th, 2006, 12:17 PM

I see, talking about the Flux Capacitor again :). I passed on that link to the site that Andy now has links to all his mods. Is really well done for a piss take.
LoL. :D
I have to get myself 8x piston return springs, a power band (what sizes does it come in...?), and some cross-drilled brake hoses. :D :bash:

TAQuickness

April 19th, 2006, 08:37 PM

don't forget the true dual's with the U-pipe

joecar

April 20th, 2006, 10:51 AM

Do you have to select the size of the U-pipe to match the size of the power band, or is bigger better...? :D:bash::muahaha:

Tordne

April 20th, 2006, 11:44 AM

In addition to all the popular power mods.. I think we should not overlook the appearance characteristics of our vehicles.

I found this Lowering Kit (http://kalecoauto.com/index.php?main_page=product_info&cPath=4&products_id=11) to be cheap and effective :muahaha:

TAQuickness

April 25th, 2006, 11:41 PM

fixed it :D

While I was dorking with my manifold in attempt to fix my lean left bank, I noticed the ground lug on the back of the left head was very loose - err about to fall out. Tighten it up, and all my guage problems appear to be resolved.

And Joe - Really appreciate all your help.

joecar

April 26th, 2006, 01:32 AM

You're welcome no worries, cool, good work :cheers: so it was G110/G112.

TAQuickness

April 26th, 2006, 01:57 AM

You're welcome no worries, cool, good work :cheers: so it was G110/G112.

Not ringing a bell or turning the light on... I think it was fate. Manifold leak around #7 forced me into the area. Now if I could just figure out how to fix the leak...

joecar

April 26th, 2006, 02:35 AM

Fate has a funny way of getting you to pay attention...

Do you know that it's #7 intake port gasket...?
Are you using the orange ones or the green ones...?

TAQuickness

April 26th, 2006, 03:36 AM

didn't know there were green ones. I was using the comp gaskets, but seemed they were bit to big. bit the bullet and picked up a set of OEM's two days ago.

To date:
discovered leak with carb cleaner
pulled manifold sealed gasket with black rtv let it sit over night
problem persisted
replaced all intake port gaskets with new OEM gaskets
problem persisted
made 1/16" spacer for #7 intake port
problem persisted
pulled manifold, removed top shell, ran bead of black RTV around gasket, removed #7 intake port gasket, ran bead of black RTV, reassembled, let sit over night
problem persists, but not as bad.

intrestingly, when using the carb cleaner (will be picking up starter tonight), a shot where manifold meets the head will cause left bank to line out with right. Give it a healthy shot, left will line out with right, but both banks run richer.

All i can think of is the head or manifold is not true.

joecar

April 26th, 2006, 05:41 AM

I think the green ones supercede the orange ones, there was a tech bulletin some place, but I don't think these are your problem.

Edit:
For my info:
do the GM orange ones fit, or do you have to use ones that come with your manifold...?

TAQuickness

April 26th, 2006, 06:10 AM

The OEM's are gray. The Comp gaskets I had were orange.