Circuit Description
The ABS indicator is controlled by the EBTCM. The EBTCM supplies the ground to CKT 867 in order to keep the indicator off. When CKT 867 looses ground at the EBTCM, the ABS indicator turns 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 Intermittents and Poor Connections Diagnosis in Wiring Systems for further diagnosis. |
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
-
This step checks for an internal EBTCM malfunction.
-
This step checks for a short to ground in CKT 867.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: ABS Indicator never comes on. | ||||
1 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |
Does the ABS Indicator come on? | -- | |||
3 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check | -- |
Is the resistance within the range specified in the value(s) column? | OL (infinite) | |||
5 | Repair CKT 867 for a short to ground. Refer to Wiring Repairs in Wiring System. Is the repair complete? | -- | Go to Diagnostic System Check | -- |
6 | Suspect the Instrument Panel. Refer to Instrument Cluster System Check in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Diagnostic System Check | -- |
