## ABS Components

#### Brake System Indicator Circuit Troubleshooting

19-80

ABS 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?

YES - The system is OK at this time.

NO - Go to step 2.

2. Turn the ignition switch OFF.
3. Disconnect the multiplex control unit 13P connector and the ABS control unit 13P connector.
4. Check for continuity between the ABS control unit 31P connector terminal No. 21 and body ground.

ABS CONTROL UNIT 31P CONNECTOR

Wire side of female terminals

Is there continuity?

YES - Repair short to body ground in the wire between the multiplex control unit and the ABS control unit.

NO - Go to multiplex control system troubleshooting (see page 22-273).

Brake system indicator does not go off

1. Release the parking brake.
2. Start the engine.

Does the brake system indicator go off?

YES - The system is OK at this time.

NO - Go to step 3.

3. Check the brake fluid level.

Is the level OK?

YES - Go to step 4.

NO - Refill the brake fluid and recheck.

4. Check the ABS indicator.

Does the ABS indicator stay on?

YES - Read the ABS DTC (see page 19-56), and do applicable troubleshooting for the DTC.

NO - Go to step 5.

5. Turn the ignition switch OFF.
6. Disconnect the ABS control unit 31P connector.
7. Connect the ABS control the ABS control terminal No. 21 and body ground with a jumper wire.

ABS CONTROL UNIT 31P CONNECTOR

Wire side of female terminals