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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INSPECT DTC FROM PCM
• Connect the WDS or equivalent to the DLC-2.
• Are any DTCs from the PCM displayed?
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Yes
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Perform DTC inspection.
(See DTC TABLE [L8, LF, L3].)
Go to Step 5.
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No
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Go to the next step.
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2
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INSPECT BCM CONNECTOR
• Disconnect the BCM connector.
• Inspect the BCM connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 5.
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No
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Go to the next step.
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3
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INSPECT BCM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Disconnect the negative battery cable.
• Disconnect the positive battery cable.
• Inspect for continuity between following terminals:
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair or replace the wiring harness for a possible open circuit, then go to Step 5.
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4
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INSPECT BCM POWER SUPPLY CIRCUIT FOR SHORT TO GND
• Inspect for continuity between following terminals:
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to GND, then go to the next step.
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No
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Go to the next step.
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5
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VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the BCM memory using the WDS or equivalent.
• Turn the ignition switch to LOCK position then ON position.
• Is the same DTC present?
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Yes
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Replace the BCM.
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No
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DTC troubleshooting completed.
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