Circuit Description
This symptom table checks the state of the ETS (TRAC OFF) indicator to identify a situation in which the driver could not be warned of a system malfunction by the ETS (TRAC OFF) indicator, or the ETS (TRAC OFF) is always ON. The EBTCM sends a message to the electronic instrument panel cluster (IPC) via the Serial Data Line and the IPC will illuminate the indicator lamps.
Diagnostic Aids
The lamp test function of the scan tool may be used to command the indicator ON while looking for an intermittent malfunction in the ETS (TRAC OFF) indicator.
The following conditions may cause an intermittent malfunction:
| • | A poor connection |
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
Use the Lamp Test function of the Scan Tool in order to turn the indicator on while looking for an intermittent malfunction in the ABS warning indicator circuitry.
Thoroughly inspect any circuitry that may cause the intermittent complaint for the following conditions:
| • | Backed out terminals |
| • | Improper mating |
| • | Improperly formed or damaged terminals |
| • | Poor terminal-to-wiring connections |
| • | Physical damage to the wiring harness |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to A Diagnostic System Check - ABS | |
2 |
Did the amber ETS (TRAC OFF) indicator turn on? | -- | ||
3 | Repair the instrument panel cluster. Refer to Instrument Cluster Replacement in Electrical Diagnosis. Is the repair complete? | -- | Go to A Diagnostic System Check - ABS | -- |
4 | Is the malfunction intermittent or not present at this time? | -- | Go to Diagnostic Aids | -- |
