How To Proceed With Troubleshooting

The hand-held tester can be used at step  4,  5,  10.

1. VEHICLE BROUGHT TO WORK SHOP 
   1. Go to next step. 
2. 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  PRE-CHECK  ) 
   1. Check that the DTCs output.

      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 DTC OUTPUTS (PROCEED TO "BODY MULTIPLEX COMMUNICATION SYSTEM)" 
   2. NO: GO TO NEXT STEP. MULTIPLEX DTC (GO TO STEP 5) 
5. DTC CHECK (OTHER THAN MULTIPLEX DTC) (See  PRE-CHECK   ) 
   1. MALFUNCTION CODE (GO TO STEP 6) 
   2. NORMAL CODE (GO TO STEP   7 ) 
6. DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 
   1. GO TO STEP   10 
7. PROBLEM SYMPTOM SIMULATION 
   1. SYMPTOM DOES NOT OCCUR (GO TO STEP 8) 
   2. SYMPTOM OCCURS (GO TO STEP   9 ) 
8. SYMPTOM SIMULATION (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
   1. GO TO STEP   10 
9. See  PROBLEM SYMPTOMS TABLE  
   1. Go to next step. 
10. CIRCUIT INSPECTION (See  DTC P0500/21 VEHICLE SPEED SENSOR CIRCUIT, DTC P0503/23 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH  ,  DIAGNOSIS CIRCUIT   ) 
    1. Go to next step. 
11. See  TERMINALS OF ECU  
    1. Go to next step. 
12. IDENTIFYING PROBLEM 
    1. Go to next step. 
13. REPAIR OR REPLACE 
    1. Go to next step. 
14. CONFIRMATION TEST 
    1. END