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STEP
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INSPECTION
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ACTION
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1
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INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND DLC-2 FOR CONTINUITY AND SHORTS
Perform DTC inspection.
Is error message displayed regarding communication between ABS (ABS/TCS) HU/CM and WDS or equivalent?
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Yes
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If the communication error message is displayed even after inspecting according to procedures displayed in the WDS or equivalent, go to Step 4.
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No
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Go to next step.
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2
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INSPECT FOR DTCS IN ABS (ABS/TCS) HU/CM
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 PID/DATA IN ABS (ABS/TCS) HU/CM
Inspect the following items using WDS or equivalent PID/DATA monitor function.
• ABS_LAMP (ABS warning light)
Is ABS_LAMP ON after more than 4 s with ignition switch on?
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Yes
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Replace ABS (ABS/TCS) HU/CM (open circuit or short to ground in ABS (ABS/TCS) HU/CM).
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No
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Go to next step.
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*4
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INSPECT WIRING HARNESS BETWEEN ABS (ABS/TCS) HU/CM AND DLC-2 FOR CONTINUITY
Disconnect ABS (ABS/TCS) HU/CM connector.
Is there continuity between connector terminal O, R and DLC-?
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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 (ABS/TCS) HU/CM and DLC-2.
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5
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INSPECT WIRING HARNESS BETWEEN ABS (ABS/TCS) HU/CM AND DLC-2 FOR SHORT TO B+
Is voltage approx. 12 V at connector terminal O, R?
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Yes
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Repair wiring harness between ABS (ABS/TCS) HU/CM and DLC-2.
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No
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Go to next step.
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*6
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INSPECT WIRING HARNESS BETWEEN ABS (ABS/TCS) HU/CM AND DLC-2 FOR SHORT TO GROUND
Is there continuity between connector terminal O, R and ground?
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Yes
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Repair wiring harness between ABS (ABS/TCS) HU/CM and DLC-2.
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No
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Replace ABS (ABS/TCS) HU/CM (communication circuit malfunction is ABS (ABS/TCS) HU/CM).
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