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 
   1. Go to next step. 
2. CUSTOMER PROBLEM ANALYSIS (See  CUSTOMER PROBLEM ANALYSIS CHECK  ) 
   1. Go to next step. 
3. PROBLEM SYMPTOM CONFIRMATION 
   1. Go to next step. 
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  ) 
   1. Go to next step. 
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  ) 
   1. 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  ) 
   1. Go to next step. 
10. PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    1. Go to next step. 
11. CIRCUIT INSPECTION (See  DTC P0500/21 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION, DTC P0503/23 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION   -  DIAGNOSIS CIRCUIT  ) 
    1. Go to next step. 
12. TERMINAL OF ECM (See  TERMINALS OF ECM  ) 
    1. Go to next step. 
13. IDENTIFICATION OF PROBLEM 
    1. Go to next step. 
14. REPAIR OR REPLACE 
    1. Go to next step. 
15. CONFIRMATION TEST 
    1. END