Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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1
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VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN 2C TERMINAL OF PCM AND GROUND)
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Turn ignition key ON (engine OFF).
• Measure voltage between terminal 2C of PCM connector (harness side) and GND.
Voltage Approx. 5 V
• Is voltage as specified?
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Yes
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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 WIRING HARNESS BETWEEN ABS/TCS HU/CM AND PCM FOR CONTINUITY
• Turn ignition key to OFF.
• Disconnect ABS/TCS HU/CM connector.
• Connect SST (adapter harness) to ABS/TCS HU/CM (harness side).
• Inspect for continuity between terminal 2C of PCM harness side and terminal L of SST (adapter harness).
• Is there continuity?
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Yes
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Go to next Step.
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No
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Repair or replace harness, then go to Step 5.
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3
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INSPECT WIRING HARNESS BETWEEN 2C TERMINAL OF PCM AND GROUND FOR SHORT TO GROUND
• Inspect continuity between terminal 2C of PCM harness side and ground.
• Is there continuity?
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Yes
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Repair or replace harness, then go to Step 5.
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No
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Go to Step 5.
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4
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INSPECT VOLTAGE PATTERN AT TERMINAL L OF ABS/TCS HU/CM
• Connect PCM connector and SST (adapter harness) to ABS/TCS HU/CM (ABS/TCS HU/CM side).
• Turn ignition key to ON.
• Inspect voltage pattern at ABS/TCS HU/CM terminal L using oscilloscope.
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Yes
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Go to Step 5.
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No
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Replace PCM, then go to Step 5.
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• Is voltage pattern as specified?
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5
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VERIFY TROUBLESHOOTING COMPLETED
• Clear DTC from memory.
(See Clearing DTCs Procedure)
• Is the same DTC present?
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Yes
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Replace ABS/TCS HU/CM, then go to next step.
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No
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Go to next step.
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6
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VERIFY AFTER REPAIR PROCEDURE
• Is there any DTC present?
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Yes
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Go to applicable DTC inspection.
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No
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Troubleshooting completed.
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