Circuit Description
The electronic brake control module (EBCM) sends a central area network (CAN) serial data message to the serial data gateway (SDG) module. The SDG module converts the CAN message to a class 2 serial data message and sends the message to the instrument panel cluster (IPC). The IPC interprets the class 2 message from the SDG module and commands the Antilock Brake System (ABS) indicator ON or OFF.
Diagnostic Aids
The malfunction must be present during diagnosis in order to prevent unnecessary parts replacement. Always begin diagnosis with Diagnostic System Check - Vehicle .
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the ABS indicator illuminate for 3 seconds and then turn OFF? | Go to Diagnostic Aids | Go to Step 3 |
Does the ABS indicator turn OFF? | Go to Step 5 | Go to Step 4 | |
4 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 6 | -- |
5 | Replace the electronic brake control module (EBCM). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 6 | -- |
6 |
Does the ABS indicator illuminate for 2 seconds and then turn OFF? | System OK | Go to Step 3 |
