Diagnostic Routine M

Diagnostic Routine M

Diagnostic Overview

The ABS Warning Indicator Is Never or Always On

Normal Operation and Fault Conditions

REFER to ABS Warning Indicator .

If the ABS (Anti-Lock Brake System) warning indicator status message is missing for less than 5 seconds, the IPC (Instrument Panel Cluster) defaults the ABS (Anti-Lock Brake System) warning indicator to its last state (on or off) based upon the last known good message received.

If the ABS (Anti-Lock Brake System) warning indicator request message is missing for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC (Diagnostic Trouble Code) U0121:00 and defaults the ABS (Anti-Lock Brake System) warning indicator on.

Pinpoint Test

1. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE IPC (Instrument Panel Cluster) SELF-TEST

1. Using a scan tool, perform the IPC (Instrument Panel Cluster) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?








2. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE ABS (Anti-Lock Brake System) MODULE SELF-TEST

1. Using a scan tool, perform the ABS (Anti-Lock Brake System) module self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?








3. CARRY OUT THE IPC (Instrument Panel Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

1. Ignition ON.

2. Using a scan tool, view the IPC (Instrument Panel Cluster) PIDs (Parameter Identifications).

3. Select the IPC (Instrument Panel Cluster) ABS (Anti-Lock Brake System) warning indicator PID (Parameter Identification) (ABS_LAMP). Command the ABS (Anti-Lock Brake System) warning indicator on then off. Observe the ABS (Anti-Lock Brake System) warning indicator.

Does the ABS (Anti-Lock Brake System) warning indicator turn illuminate when commanded on and turn off when commanded off?