The IPC illuminates the ABS indicator when the following occurs:
The EBCM detects an ABS-disabling malfunction and sends a serial data message to the IPC requesting illumination
The IPC performs the bulb check.
The IPC detects a loss of serial data communication with the EBCM.
The EBCM sends a serial data message to the IPC requesting illumination.
Before beginning vehicle diagnosis, the following preliminary inspections/tests must be performed:
Ensure that the battery is fully charged.
Ensure that the battery cables are clean and tight.
Inspect for any open fuses.
Ensure that the grounds are clean, tight, and in the correct location
Inspect the easily accessible systems or the visible system components for obvious damage or conditions that could cause the concern. This would include checking to ensure that all connections/connectors are fully seated and secured.
Inspect for aftermarket devices that could affect the operation of the system
Search for applicable service bulletins.
Install a scan tool. Verify that the scan tool powers up.
Ignition ON, Engine OFF, verify communication with all of the control modules on the vehicle.
Check for any related DTCs.