Source and target (PID) addresses

[TomStillo]

Hi,

I'm new to this OBDII stuff, perhaps someone knowledgeable can help me out.

I captured a slew of messages and I'm trying to decode 3 of them.

Source address, Target address
10, 53 I think 10=PCM or ECM, and 53= engine systems, is this correct? Can anyone give an example of an engine system? actual message: 88 53 10 4 C4 I'm not sure what this message does?
40, FF No idea what 40 is, I think FF is Network control, but I'm not sure what that means? Actual message: 28 FF 40 06 07 02 0A 88 I'm not sure what this message does?
60, EB 60 might be related to displays (I think that means instruments) again not sure what this message is about? actual message: AA EB 60 20 C9 00 97

Can anyone provide any insight?

Thank you for your help

[joecar]

Hi Tom,

The EFILive scantool abstracts the user from the details (the user would not see the low level protocol op codes).

[Blacky]

Based on the messages I presume you are looking at GM VPW messages. If you are scanning the VPW "chatter" messges that are transmitted on the bus by various modules without being requested then sorry I don't have any idea what data they contain. The data will be different for different vehicles and different modules.

Here's some module ID's based on the messages you posted.
$10 = PCM (Powertrain Control Module (i.e. ECM & TCM combined)
$11 = ECM (Engine Control Module)
$18 = TCM (Transmission Control Module)
$28 = ABS (Antilock Braking System)
$40 = BCM (Body Control Module)
$53 = don't know
$60 = IPC (Instrument Panel Cluster)
$88 = don't know
$AA = don't know
$EB = don't know
$F0/$F1 = Off board tool (i.e. scan tool)
$FE = broadcast to all modules

Regards
Paul

[TomStillo]

Based on the messages I presume you are looking at GM VPW messages. If you are scanning the VPW "chatter" messges that are transmitted on the bus by various modules without being requested then sorry I don't have any idea what data they contain. The data will be different for different vehicles and different modules.

Here's some module ID's based on the messages you posted.
$10 = PCM (Powertrain Control Module (i.e. ECM & TCM combined)
$11 = ECM (Engine Control Module)
$18 = TCM (Transmission Control Module)
$28 = ABS (Antilock Braking System)
$40 = BCM (Body Control Module)
$53 = don't know
$60 = IPC (Instrument Panel Cluster)
$88 = don't know
$AA = don't know
$EB = don't know
$F0/$F1 = Off board tool (i.e. scan tool)
$FE = broadcast to all modules

Regards
Paul

Paul,

Thanks, that's helpful, where did you find this information?

Tom

[Blacky]

Paul,

Thanks, that's helpful, where did you find this information?

Tom

Many, many years of developing scan tool software and many many years testing it on different vehicles with various module configurations...

Regards
Paul