NO.5 ABS WARNING LIGHT STAYS ON 4 S OR MORE WHEN THE IGNITION SWITCH IS TURNED TO THE ON POSITION[L3]

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5
ABS warning light stays on 4 s or more when the ignition switch is turned to the ON position.
[TROUBLESHOOTING HINTS]
•  ABS CM detects ABS system malfunction.

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND DLC‐2 FOR CONTINUITY AND SHORT CIRCUIT
•  Perform DTC inspection.
•  Is any error message displayed regarding communication between ABS HU/CM and M-MDS?
Yes
If the communication error message is displayed even after inspecting according to the procedures displayed in the M-MDS, go to Step 4.
No
Go to the next step.
2
INSPECT FOR DTCs IN ABS HU/CM
•  Have DTCs been stored in memory?
Yes
Perform the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS[L3].)
No
Inspect the instrument cluster
If the instrument cluster is normal, go to the next step.
If the instrument cluster has a malfunction, repair the instrument cluster, go to the next step.
3
INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND DLC-2 FOR CONTINUITY
•  Disconnect the ABS HU/CM connector.
•  Is there continuity between connector terminal AQ and DLC-2?
 
Yes
Go to the next step.
No
Repair the wiring harness between the ABS HU/CM and DLC-2.
*4
INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND DLC‐2 FOR SHORT TO POWER SUPPLY
•  Is the voltage approx. 12 V at connector terminal AQ?
Yes
Repair the wiring harness between the ABS HU/CM and DLC-2.
No
Go to the next step.
5
INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND DLC‐2 FOR SHORT TO GROUND
Is there continuity between connector terminal H, L 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 REMOVAL/INSTALLATION.)

•  When performing an asterisked (*) troubleshooting inspection, slightly shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, verify that the connectors, terminals and wiring harness are connected correctly and undamaged.