Help With DTC's

[TAQuickness]

Thanks Joe!

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

[joecar]

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

[joecar]

WOW. Thats a reply. Talk about informative.

Thanks mate.

[joecar]

I found more info on my Helm's:

Data Link Communications Circuit Description

Data Link Connector (DLC)

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)

Class 2 Serial Data Link

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]

Data Link Communications Components

Name	Location	Locator View	Connector End View
Data Link Conn (DLC)	Under the IP, right of the steering column	Data Link Communications Component Views	Data Link Communications Connector End Views
Electronic Brake Control Module (EBCM)	Mounted with brake pressure modulator valve on the top of the left front frame rail	ABS Component Views in ABS Traction Control	ABS Connector End Views in ABS Traction Control
Inflatable Restraint Sensing and Diagnostic Module (SDM)	On the floor tunnel, below the rear of the console	Hydraulic Brakes Component Views in Hydraulic Brakes	SIR Connector End Views in SIR
Instrument Cluster	On the left side of the IP	Instrument Panel, Gages, and Console Component Views in Instrument Cluster, Gages and Console	Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console
IP Fuse Block	On the left end of the IP carrier	Instrument Panel, Gages, and Console Component Views in Instrument Cluster, Gauges and Console	--
Powertrain Control Module (PCM) (V8 VIN G)	On the right side of the engine compartment, rear of the wheelhouse	Engine Controls Component Views in Engine Controls	Powertrain Control Module (PCM) Connector End Views in Engine Controls
Star Connector	Under the left side of the IP, near the DLC	Lighting Systems Component Views in Lighting Systems	--

[joecar]

Continued...

C200D (48 cavities)	Part of the IP harness, between the left kick panel and the steering column	Harness Routing Views in Wiring Systems	Inline Harness Connector End Views in Wiring Systems
C220 (10 cavities)	IP to engine harness, under the right side of the IP, behind the knee bolster	Harness Routing Views in Wiring Systems	Inline Harness Connector End Views in Wiring Systems
C230 (10 cavities)	IP to engine harness, under the right side of the IP, behind the knee bolster	Harness Routing Views in Wiring Systems	Inline Harness Connector End Views in Wiring Systems
G110 (V8 VIN G)	Attached to the rear of the left cylinder head	Harness Routing Views in Wiring Systems	--
G200	Near the left A-pillar, bolted to the IP mounting stud behind the kick panel	Harness Routing Views in Wiring Systems	--

---

[TAQuickness]

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

Electronic Brake Control Module (EBCM)
Mounted with brake pressure modulator valve on the top of the left front frame rail
ABS Component Views in ABS Traction Control
ABS Connector End Views in ABS Traction Control

[joecar]

ABS Component Views

Figure 1:	Center of I/P - Chevy
Figure 2:	Accelerator and servo control module
Figure 3:	Front wheel speed sensor
Figure 4:	Left front frame rail
Figure 5:	Right side of auto trans - V6
Figure 6:	Left side of manual trans - V8
Figure 7:	Rear axle (speed Sensors)
Figure 8:	Top of rear axle

---

Which of these do you want expanded...?

These show the named component location in vehicle.

Don't follow the links.

[joecar]

ABS Connector End Views

Table 1:	Accelerator Control and Adjuster
Table 2:	Accelerator and Servo Control Module (ASM)
Table 3:	Electronic Brake Control Module
Table 4:	Traction Control Switch
Table 5:	Wheel Speed Sensor, Left Front
Table 6:	Wheel Speed Sensor, Left Rear (With NW9)
Table 7:	Wheel Speed Sensor, Right Front
Table 8:	Wheel Speed Sensor, Right Rear (With NW9)
Table 9:	Wheel Speed Sensor, Rear (Without NW9)

Which of these do you want expanded...?

These show connector views with pinouts.

[joecar]

TAQuickness,

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

Electronic Brake Control Module

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