Circuit Description
The instrument panel cluster (IPC) turns the ABS indicator on during the IPC bulb check for approximately 3 seconds when the ignition switch is turned to the RUN position. If the electronic brake control module (EBCM) sets a Diagnostic Trouble Code (DTC) the EBCM sends a class 2 message to the IPC to command the ABS indicator on.
Diagnostic Aids
| • | It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction. |
| • | Thoroughly inspect any circuitry that may be causing the complaint for the following conditions: |
| - | Backed out terminals |
| - | Improper mating |
| - | Broken locks |
| - | Improperly formed or damaged terminals |
| - | Poor terminal-to-wiring connections |
| - | Physical damage to the wiring harness |
| • | The following conditions may cause an intermittent malfunction: |
| - | A poor connection |
| - | Rubbed-through wire insulation |
| - | A broken wire inside the insulation |
| • | If an intermittent malfunction exists refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: ABS indicator does not turn on during the instrument panel cluster (IPC) bulb check and no ABS/TCS DTC(s) are set. | ||||
1 | Did you perform the ABS Diagnostic System Check? | -- | ||
2 |
Does the ABS WARNING indicator illuminate briefly during the bulb check? | -- | ||
3 | Replace the electronic brake control module (EBCM). Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | -- | |
4 | Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Did you complete the repair? | -- | -- | |
