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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 RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any repair information available?
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Yes
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Perform repair or diagnosis according to available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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2
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FOLLOW OTHER DETECTED DTC FIRST
• Turn the engine switch off.
• Start the engine.
• Has P1602 been detected?
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Yes
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Go to the DTC P1602 inspection.
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No
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Go to the next step.
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3
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INSPECT POOR CONNECTION OF IMMOBILIZER UNIT CONNECTOR
• Has P1621 been detected?
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Yes
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Go to the DTC P1621 inspection.
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No
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Go to the next step.
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4
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VERIFY TROUBLESHOOTING OF DTC P1624 COMPLETED
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
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Yes
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Replace the PCM, 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 AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
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Yes
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Go to the applicable DTC inspection.
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No
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Troubleshooting completed.
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