Brake System Indicator Circuit Troubleshooting - Without VSA

Brake system indicator does not come on

1. 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 2 .

1. Do the gauge control module self-diagnosis function procedure.

Is the gauge control module OK?

YES | - | Go to Step 3 .
NO | - | Replace gauge control module. ■

1. Turn the ignition switch OFF.

1. Disconnect the ABS modulator-control unit 25P connector.

1. Connect the ABS modulator-control unit 25P connector terminal No. 11 and body ground with a jumper wire.

1. Turn the ignition switch ON (II).

Does the brake system indicator come on?

YES | - | Check for loose terminals in the ABS modulator-control unit 25P connector. If connector is OK, replace the ABS modulator-control unit. ■
NO | - | Repair open in the wire between the gauge control module and the ABS modulator-control unit.■

Brake system indicator does not go off

1. Turn the ignition switch ON (II).

1. Release the parking brake.

Does the brake system indicator go off after several seconds?

YES | - | The system is OK at this time.■
NO | - | Go to Step 3 .

1. Check the brake fluid level.

Is the level OK?

YES | - | Go to Step 4 .
NO | - | Refill the brake fluid, and recheck.■

1. Check the ABS indicator.

Does the ABS indicator stay on?

YES | - | Read the DTC, and do the applicable troubleshooting for the DTC.■
NO | - | Go to Step 5 .

1. Turn the ignition switch OFF.

1. Disconnect the ABS modulator-control unit 25P connector.

1. Turn the ignition switch ON (II), and check the brake system indicator.

Does the brake system indicator go off?

YES | - | Replace the ABS modulator-control unit. ■
NO | - | Go to Step 8 .

1. Turn the ignition switch OFF.

1. Remove the gauge control module.

1. Disconnect the gauge control module connector (36P).

1. Check for continuity between the ABS modulator-control unit 25P connector terminal No. 11 and body ground.

Is there continuity?

YES | - | Repair short to body ground in the wire between the gauge control module and the ABS modulator-control unit.■
NO | - | Check for a short to body ground in the brake system indicator circuit. ■