ABS Indicator Inoperative W/No DTC Set

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CIRCUIT DESCRIPTION
The Electronic Brake Control Module (EBCM) turns OFF the ABS warning indicator by grounding terminal 11 after Initialization.

The ABS warning indicator is connected to the gauge fuse. This circuit has power when the ignition switch is in the ON or START positions.

When the ignition switch is turned to the ON position, the EBCM turns ON the ABS warning indicator for 3 seconds for a bulb check. If the EBCM detects a malfunction, the ABS warning indicator will stay ON to warn the driver that the ABS is disabled and it needs service.

DIAGNOSTIC AIDS
Inspect for the following when diagnosing this part of the Antilock Brake System (ABS):
^ Open gauge fuse
^ Open ABS warning indicator bulb filament
^ Open or poor G103
^ Open within Instrument panel gage cluster printed circuit

Inspect the following harness connectors:
^ For backed-out terminals
^ For improper mating
^ For broken locks
^ For improperly formed or damaged terminals
^ For poor terminal to wiring connections
^ For physical damage to the wiring harness before component replacement:
- Instrument panel gage cluster electrical connectors
- Junction block electrical connectors
- EBCM electrical connector

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. Tests for power distribution to the instrument panel gage cluster.
3. Tests for power distribution to the EBCM (ignition power).
4. Tests for power distribution to the EBCM for motor and solenoids.
5. Tests for proper ground to the EBCM.
6. Tests for proper ground to the EBCM.
7. Tests for a short to ground in the ignition power circuit.
8. Tests for an open or high resistance in the ignition power circuit.
9. Tests for excessive current draw from the EBCM.
10. Tests for a short to ground in the motor power input circuit.
11. Tests for a short to ground in the solenoid power input circuit.
12. Tests for an open or high resistance in the motor power input circuit.
13. Tests for an open or high resistance in the solenoid power input circuit.
14. Tests for excessive current draw from the EBCM.
15. Tests for an open or high resistance in the ignition power circuit.
16. Tests for an open or high resistance in the motor power input circuit.
17. Tests the integrity of the ABS warning indicator circuit.
18. Tests for a bulb open filament of the ABS warning indicator.
19. Test for an open or high resistance in the instrument panel gage cluster power input circuit.
35. Tests the ability of the EBCM to turn ON the ABS warning indicator through a scan tool command.