Brake System Indicator Does Not Come on

Brake system indicator does not come on
1. Apply the parking brake.
2. Turn the ignition switch ON (II), and watch the brake system indicator.
Does the brake system indicator come on and stay on?
YES - Go to step 3.
NO - Go to step 6.

3. Turn the ignition switch OFF.
4. Release the parking brake.
5. Turn the ignition switch ON (II), and watch the brake system indicator.
Does the brake system indicator come on for several seconds?
YES - The system is OK at this time.
NO - Go to step 13.

6. Turn the ignition switch OFF, then turn it ON (II) again.
Does the ABS indicator come on for several seconds?
YES - Go to step 11.
NO - Go to step 7.

7. Turn the ignition switch OFF.
8. Remove the gauge assembly. Do not disconnect the gauge assembly connector A (22P) and connector B (30P).
9. Turn the ignition switch ON (II).





10. Measure the voltage between the gauge assembly connector A (22P) terminal No. 18 and body ground.
Is there less then 0.1 V?
YES - Do the self-diagnostic function troubleshooting for the gauge assembly.
NO - Repair open in the wire between the gauge assembly and body ground (G501).

11. Turn the ignition switch OFF.
12. Release the parking brake.
13. Turn the ignition switch ON (II).
Does the brake system indicator come on for several seconds?
YES - Do the parking brake switch test.
NO - Go to step 14.

14. Turn the ignition switch OFF.
15. Disconnect the VSA modulator-control unit 47P connector.
16. Turn the ignition switch ON (II).
Does the brake system indicator come on for several seconds?
YES - Check for loose terminals in the VSA modulator-control unit 47P connector. If necessary, substitute a known-good VSA modulator-control unit, and retest.
NO - Go to step 17.

17. Turn the ignition switch OFF.
18. Remove the gauge assembly.
19. Check the brake system indicator bulb in the gauge assembly.
Is the bulb OK?
YES - Go to step 20.
NO - Replace the brake system indicator bulb.

20. Disconnect the gauge assembly connector B (30P).





21. Check for continuity between the gauge assembly connector B (30P) terminal No. 25 and body ground.
Is there continuity?
YES - Repair short to body ground between the gauge assembly and the VSA modulator-control unit.
NO - Check for loose terminals in the gauge assembly connector B (30P). If necessary, substitute a known-good gauge assembly, and retest.