Component Inspection

Component Inspection

1. Ignition "OFF".
2. Ignition "ON".
3. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode
4. Using a scantool, Clear DTC.
5. Select "Diagnostic Trouble Codes (DTCs)" mode again.
6. Are any DTCs present?
YES
1) Substitute with a known-good sensor cluster and check for proper operation. If problem is corrected, replace sensor cluster and then go to "Verification of Vehicle Repair" procedure.
2) Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.
NO
1) Fault is intermittent caused by poor connection in sensor cluster harness or faulty sensor cluster.
Go to "Verification of Vehicle Repair" procedure.