5

ABS warning light stays on 4 s or more when the ignition switch to the ON position.

[TROUBLESHOOTING HINTS]

• ABS HU/CM detects ABS system malfunction.

STEP

INSPECTION

ACTION

1

• Perform the DTC inspection.

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

Yes

If a communication error message is displayed even after inspecting according to procedures displayed in the M-MDS, go to Step 4.

No

Go to the next step.

2

• Have DTCs been stored in memory?

Yes

Perform the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS[ABS].)

No

Go to the next step.

3

• 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

Replace the ABS HU/CM (open circuit or short to ground in ABS HU/CM).

(See ABS HU/CM REMOVAL/INSTALLATION.)

No

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

^*4

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.

^*5

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

Yes

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

No

Go to the next step.

^*6

• 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.)