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STEP
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INSPECTION
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ACTION
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1
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• Perform DTC inspection.
• Is error message displayed regarding communication between ABS HU/CM and WDS or equivalent?
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Yes
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If a communication error message is displayed even after inspecting according to procedures displayed on the WDS or equivalent, go to Step 7.
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No
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Go to next step.
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2
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• Have DTCs been recorded in memory?
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Yes
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Perform inspection using appropriate DTC.
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No
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Go to next step.
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3
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• Inspect the following items using WDS or equivalent.
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- ABS_LAMP (ABS warning light)
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- BRAKE_LMP (BRAKE system warning light)
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- ABS_VOLT (power supply voltage)
• Drive vehicle under conditions in which warning light illuminates.
• Do ABS_LAMP and BRAKE_LMP go ON when malfunction symptom happens again?
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Yes
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Go to Step 6.
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No
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Go to next step.
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*4
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• Disconnect ABS HU/CM connector. Connect SST (adapter harness) (vehicle harness side only).
• Use the SST (adapter harness) connector to ground the warning light terminal (ABS: terminal W, BRAKE system: terminal X) to body ground.
• Drive vehicle under conditions in which warning light illuminates.
• Does malfunction symptom happen again?
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Yes
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Go to next step.
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No
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Replace ABS HU/CM (open circuit in ABS HU/CM).
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*5
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• Is there continuity between following SST (adapter harness) connector terminal and instrument cluster connector (16-pin, 24-pin) terminals?
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- Terminal W and 1B
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- Terminal X and 3S
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Yes
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Replace instrument cluster (open or ground to short in instrument cluster).
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No
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Repair wiring harness between ABS HU/CM (ABS warning light: terminal W, BRAKE system warning light: terminal X) and instrument cluster.
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6
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• Drive vehicle under conditions in which warning light illuminates.
• Inspect the voltage for PID/DATA monitor ABS_VOLT when ABS warning light and BRAKE system warning light illuminates again.
Specification: above more than 10 V
• Is voltage within specification?
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Yes
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Replace ABS HU/CM (open or ground to short in ABS HU/CM).
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No
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Go to next step.
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7
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• Is battery voltage normal?
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Yes
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Go to next step.
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No
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Perform inspection of battery and charging system.
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8
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• Is battery voltage normal with electrical load (A/C, headlights, etc.) on while engine is idling?
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Yes
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Go to next step.
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No
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Perform inspection of charging system (drive belt tension, generator, etc.).
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9
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• Is ABS HU/CM connector securely connected?
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Yes
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Go to Step 11.
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No
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Connect ABS HU/CM connector securely, then go to next step.
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10
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• Drive vehicle under conditions in which warning light illuminates.
• Does malfunction symptom happen again?
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Yes
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Inspect and repair wiring harness for ABS HU/CM power supply (terminal Z) and ground 1 (terminal AA)).
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No
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Temporary poor connection in connector.
Inspect ABS HU/CM connector and terminal.
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*11
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• Disconnect ABS HU/CM connector. Connect SST (adapter harness) (vehicle harness side only).
• Is there continuity between SST (adapter harness) connector terminal T and DLC-2?
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Yes
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Go to next step.
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No
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Repair wiring harness between ABS HU/CM and DLC-2.
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*12
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• Is voltage approximately 12 V at SST connector terminal T?
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Yes
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Repair wiring harness between ABS HU/CM and DLC-2.
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No
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Go to next step.
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*13
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• Is there continuity between SST (adapter harness) connector terminal T and ground?
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Yes
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Repair wiring harness between ABS HU/CM and DLC-2.
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No
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Inspect and repair wiring harness for ABS HU/CM power supply (terminal Z) and ground 1 (terminal AA)).
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