6

BRAKE system warning light stays on 4 s or more when the ignition switch is turned to the ON position. (Parking brake is released.)

[TROUBLESHOOTING HINTS]

• Malfunction of instrument cluster or ABS HU/CM

• Short to ground in circuit in parking brake switch and/or brake fluid level sensor

STEP

INSPECTION

ACTION

1

• Is brake fluid level normal?

Yes

Go to the next step.

No

Add brake fluid.

^*2

• Monitor the one or more items of ABS HU/CM using the M-MDS datalogger function.

• Is error message displayed regarding communication between ABS HU/CM and M-MDS?

Yes

If a communication error message is displayed even after inspecting according to procedures displayed on M-MDS.

Go to next Step 6.

No

Go to the next step.

3

• Have DTCs been stored in memory?

Yes

Perform the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS[ABS].)

No

Go to the next step.

4

• Turn on the all warning light on instrument cluster using the instrument cluster input/output check code26.

  (See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.)

• Does the warning light illuminate?

Yes

Go to the next step.

No

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

5

• Disconnect in the following order:

1. Parking brake switch connector

2. Brake fluid level sensor connector

• Does the BRAKE system warning light go out with ignition switch turned to the ON position?

Yes

Replace the parking brake switch and/or brake fluid level sensor (Short with some internal part).

(See MASTER CYLINDER REMOVAL/INSTALLATION.)

(See PARKING BRAKE LEVER REMOVAL/INSTALLATION.)

No

Perform the following inspections. Repair if necessary.

• Short to ground in the wiring harness between the instrument cluster (BRAKE system warning light) and parking brake switch.

• Short to ground in the wiring harness between the instrument cluster (BRAKE system warning light) and brake fluid level sensor.

If inspection results are okay, replace the ABS HU/CM.

(See ABS HU/CM REMOVAL/INSTALLATION.)

^*6

• Disconnect the ABS HU/CM connector.

• Is there continuity between connector terminal Z, Y and DLC-2?

Yes

Go to the next step.

No

Repair the wiring harness between the ABS HU/CM and DLC-2.

^*7

• Is the voltage approx. 12 V at connector terminal Z, Y?

Yes

Repair the wiring harness between the ABS HU/CM and DLC-2.

No

Go to the next step.

^*8

• Is there continuity between connector terminal Z, Y and ground?

Yes

Repair the wiring harness between the ABS HU/CM and DLC-2.

No

Replace the ABS HU/CM (communication circuit malfunction in ABS HU/CM).

(See ABS HU/CM REMOVAL/INSTALLATION.)