How To Proceed With Troubleshooting

The hand-held tester can be used at steps 4, 5, 6, and 10.

1. VEHICLE BROUGHT TO WORK SHOP 

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2. CUSTOMER PROBLEM ANALYSIS CHECK  ) 

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3. PROBLEM SYMPTOM CONFIRMATION 

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4. DTC CHECK/CLEAR  ) 

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5. DTC CHECK (SEE  DTC CHECK/CLEAR  ) 

   TROUBLE CODE (GO TO STEP 6) 

   NORMAL SYSTEM CODE (GO TO step   7 ) 

6. DIAGNOSTIC TROUBLE CODE CHART  ) 

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   GO TO step   10 

7. PROBLEM SYMPTOM SIMULATION 

   SYMPTOM DOES NOT OCCUR (GO TO STEP 8) 

   SYMPTOM OCCURS (GO TO step   9 ) 

8. SYMPTOM SIMULATION (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 

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9. PROBLEM SYMPTOMS TABLE  ) 

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10. CIRCUIT INSPECTION (SEE  DTC P0500/21 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION DTC P0503/23 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION   to  DIAGNOSIS CIRCUIT  ) 

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11. TERMINALS OF ECM  ) 

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12. IDENTIFICATION OF PROBLEM 

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13. REPAIR OR REPLACE 

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14. CONFIRMATION TEST 

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    END