How To Proceed With Troubleshooting

The hand-held tester can be used at steps 4, 5, 6, and 11.

1. VEHICLE BROUGHT TO WORK SHOP 
2. CUSTOMER PROBLEM ANALYSIS (SEE  CUSTOMER PROBLEM ANALYSIS CHECK   ) 
3. PROBLEM SYMPTOM CONFIRMATION 
4. CHECK BODY MULTIPLEX COMMUNICATION SYSTEM (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
   1. Check for output DTCs.

      HINT:

      The ECM of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.

   1. MULTIPLEX SYSTEM DTC IS OUTPUT (PROCEED TO "BODY MULTIPLEX COMMUNICATION SYSTEM") 
   2. NO MULTIPLEX SYSTEM DTC (GO TO STEP 5) 
5. DTC CHECK AND CLEAR (SEE  DTC CHECK/CLEAR   ) 
6. DTC CHECK (OTHER THAN MULTIPLEX DTC) (SEE  DTC CHECK/CLEAR   ) 
   1. TROUBLE CODE (GO TO STEP 7) 
   2. NORMAL SYSTEM CODE (GO TO STEP 8) 
7. DTC CHART (SEE  DIAGNOSTIC TROUBLE CODE CHART   ) 

   GO TO STEP 11 

8. PROBLEM SYMPTOM SIMULATION 
   1. SYMPTOM DOES NOT OCCUR (GO TO STEP 9) 
   2. SYMPTOM OCCURS (GO TO STEP 10) 
9. SYMPTOM SIMULATION (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
10. PROBLEM SYMPTOMS TABLE (SEE  PROBLEM SYMPTOMS TABLE   ) 
11. CIRCUIT INSPECTION (SEE  DTC P0500/21 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION, DTC P0503/23 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION   -  DIAGNOSIS CIRCUIT   ) 
12. TERMINALS OF ECM (SEE  TERMINALS OF ECM   ) 
13. IDENTIFICATION OF PROBLEM 
14. REPAIR OR REPLACE 
15. CONFIRMATION TEST 

    END