How To Proceed With Troubleshooting

The hand-held tester can be used at step 4, 5, 6, 12.

1. VEHICLE BROUGHT TO WORK SHOP 
   1. NEXT: GO TO NEXT STEP. 
2. (SEE  CUSTOMER PROBLEM ANALYSIS CHECK   ) 
   1. Confirm problem symptoms.
   1. NEXT: GO TO NEXT STEP. 
3. PROBLEM SYMPTOM CONFIRMATION 
   1. SYMPTOM DOES NOT OCCUR (GO TO STEP 4) 
   2. SYMPTOM OCCURS (GO TO STEP  5 .) 
4. CHECK BODY MULTIPLEX COMMUNICATION SYSTEM (SEE  DIAGNOSTIC TROUBLE CODE CHART  ) 
   1. Check for the DTC outputs.
   1. MULTIPLEX DTC OUTPUTS (PROCEED TO "BODY MULTIPLEX COMMUNICATION SYSTEM") 
   2. NO: MULTIPLEX DTC (GO TO STEP 5) 
5. DTC CHECK (OTHER THAN MULTIPLEX DTC) (SEE  DTC CHECK/CLEAR   ) 
   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  8 . 
7. (SEE  PROBLEM SYMPTOMS TABLE   ) 
   1. NEXT: GO TO NEXT STEP. 
8. (SEE  TERMINALS OF ECU   ) 
   1. NEXT: GO TO NEXT STEP. 
9. CIRCUIT INSPECTION (see  HEADLIGHT RELAY CIRCUIT   -  HEADLAMP SWIVEL MAIN SWITCH CIRCUIT   ) 
   1. NEXT: GO TO NEXT STEP. 
10. IDENTIFICATION OF PROBLEM 
    1. NEXT: GO TO NEXT STEP. 
11. REPAIR OR REPLACE 
    1. NEXT: GO TO NEXT STEP. 
12. CONFIRMATION TEST 
    1. NEXT: END