Circuit Description
This symptom table checks the following conditions:
| • | Checks the state of the ABS indicator to identify a situation in which the ABS indicator did not warn the driver of a system malfunction. |
| • | The ABS indicator 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
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.
If the malfunction is not current, use wiggle test on the wiring harness to pinpoint an intermittent malfunction in the motor circuitry or connections. Thoroughly inspect any circuitry that may be causing 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 |
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | ||
2 |
Did the amber ABS warning indicator turn on? | -- | ||
3 |
Did the amber ABS warning indicator flash? | -- | ||
4 |
Are the indicator bulbs good? | -- | ||
5 | Replace the indicator bulb. Is the repair complete? | -- | -- | |
6 | Replace the instrument panel cluster. Is the repair complete? | -- | -- |
