How To Proceed With Troubleshooting

The Techstream can be used in steps 3, 4, 6, 8, 10 and 11.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS 
   1. Confirm problem symptoms (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).
3. CHECK MULTIPLEX COMMUNICATION SYSTEM 
   1. Check for DTC outputs.

   DTC IS OUTPUT: CHECK MULTIPLEX COMMUNICATION CIRCUIT 

   DTC IS NOT OUTPUT: Go to step   4 

4. CHECK CAN COMMUNICATION SYSTEM 
   1. Check for DTC outputs.

   DTC IS OUTPUT: CHECK CAN COMMUNICATION CIRCUIT 

   DTC IS NOT OUTPUT: Go to step   5 

5. CHECK WARNING LIGHT 
6. CHECK DTC (Present and Past DTCs) 

   DTC IS OUTPUT (INCLUDING NORMAL SYSTEM CODE): Go to step   7 

   DTC IS NOT OUTPUT: PROBLEM SYMPTOMS TABLE 

7. DTC CHART 
8. CIRCUIT INSPECTION 
9. REPAIR 
10. CLEAR DTC (Present and Past DTCs) 
11. CHECK DTC (Present and Past DTCs) 

    DTC IS NOT OUTPUT: Go to step   12 

    DTC IS OUTPUT: Go to step   7 

12. CONFIRMATION TEST 

    NEXT: END