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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/TCS HU/CM AND DLC-2 (DATA LINK CONNECTOR-2) FOR CONTINUITY AND SHORTS
Perform DTC inspection.
Is error message displayed regarding communication between 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 8.
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No
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Go to next step.
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2
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CHECK FOR DTCs IN 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/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 seconds with ignition switch on?
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Yes
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Replace ABS/TCS HU/CM (open circuit or short to ground in 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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VERIFY THAT ABS/TCS HU/CM CONNECTOR TERMINAL W IS CONNECTED
Does malfunction symptom happen again when ABS/TCS HU/CM connector terminal W is shaken while the ignition switch is ON?
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Yes
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Connect ABS/TCS HU/CM connector terminal W securely, then go to next step.
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No
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Go to next step 6.
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5
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VERIFY THAT MALFUNCTION SYMPTOM OCCURS AFTER ABS/TCS HU/CM CONNECTOR TERMINAL W IS CONNECTED
Do ABS warning light go out after more than 4 seconds with ignition switch on?
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Yes
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Temporary poor connection at terminal.
Inspect ABS/TCS HU/CM connector and terminal.
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No
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Go to next step.
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*6
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CHECK FOR OPEN CIRCUITS IN ABS/TCS HU/CM
Disconnect ABS/TCS HU/CM connector.
Connect the SST (49 G066 001) (vehicle harness side only).
Use the SST connector to ground ABS warning light terminal W to body ground.
Does ABS warning light go out with ignition switch on?
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Yes
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Replace ABS/TCS HU/CM (open circuit in ABS/TCS HU/CM).
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No
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Go to next step.
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*7
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VERIFY SHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER AND ABS/TCS HU/CM FOR CONTINUITY) OR INSTRUMENT CLUSTER
Is there continuity between following SST connector terminal W and instrument cluster connector (24-pin) terminal 2F?
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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/TCS HU/CM (terminal W) and instrument cluster.
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*8
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INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND DLC-2 (DATA LINK CONNECTOR-2) FOR CONTINUITY
Disconnect ABS/TCS HU/CM connector.
Connect the SST (49 G066 001) (vehicle harness side only).
Is there continuity between SST connector terminal T and data link connector?
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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/TCS HU/CM and data link connector.
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*9
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INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND DLC-2 (DATA LINK CONNECTOR-2) FOR SHORT TO B+
Is voltage approximately 12V at SST connector terminal T?
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Yes
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Repair wiring harness between ABS/TCS HU/CM and data link connector.
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No
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Go to next step.
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*10
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INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND DLC-2 (DATA LINK CONNECTOR-2) FOR SHORT TO GROUND
Is there continuity between SST connector terminal T and ground?
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Yes
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Repair wiring harness between ABS/TCS HU/CM and data link connector.
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No
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Replace ABS/TCS HU/CM (communication circuit malfunction is ABS/TCS HU/CM).
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