GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The powertrain control module (PCM) sends a state of health message to the EBCM within 5.5 seconds after the modules are powered up. This message is sent via serial data communications.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The EBCM fails to receive serial data from the PCM.

Action Taken When the DTC Sets

If equipped, the following actions may occur:

    • The EBCM disables the TCS/VSES.
    • The traction off indicator turns ON.
    • The message center displays the service stability system message.

Conditions for Clearing the DTC

The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.

Step

Action

Yes

No

1

Did you perform the ABS Diagnostic System Check?

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

Go to Diagnostic System Check - ABS