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STEP
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INSPECTION
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RESULTS
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ACTION
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1
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• Connect WDS or equivalent to DLC-2.
• Turn key to ON (Engine OFF).
• Retrieve any DTCs.
• Is "PASSED" displayed?
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Yes
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No DTC is displayed:
• Go to the next step.
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No
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DTC is displayed:
• Go to appropriate DTC test.
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2
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• Remove thermostat and inspect operation.
• Is thermostat okay?
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Yes
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ECT and thermostat are okay.
Go to the next step.
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No
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Access ECT PID.
Inspect for both ECT PID and temperature gauge on instrument cluster readings.
• If temperature gauge on instrument cluster indicates normal range but ECT PID is not same as temperature gauge reading, inspect ECT sensor.
• If temperature gauge on instrument cluster indicates cold range but ECT PID is normal, inspect temperature gauge and heat gauge unit.
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3
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• Is throttle body free of contaminations?
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Yes
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Inspect for air leakage from intake-air system components while racing engine to higher speed.
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No
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Clean or replace throttle body.
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4
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• Verify test results.
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- If okay, return to diagnostic index to service any additional symptoms.
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- If malfunction remains, inspect related Service Information and perform repair or diagnosis.
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• If vehicle is repaired, troubleshooting completed.
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• If vehicle is not repaired or additional diagnostic information is not available, replace PCM.
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