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 class 2 serial data communications.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The State of Health message is not received by the EBCM.

Action Taken When the DTC Sets

    • The TRACTION OFF indicator is commanded on.
    • The Traction Control is disabled for the remainder of the ignition cycle.

Conditions for Clearing the DTC

    • Repair the condition(s) responsible for setting the DTC.
    • Use a scan tool in order to clear the DTC.
 

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