Source and target (PID) addresses

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

Hi Tom,

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

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

Quote:

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Originally Posted by 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

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Paul,

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

Tom

Quote:

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Originally Posted by TomStillo

Paul,

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

Tom

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

Regards
Paul