How To Proceed With Troubleshooting

HINT:

• Use this procedure to troubleshoot the multiplex communication system.
• Techstream should be used in step 2.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output.
   2. Delete the DTC.
   3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC does not reoccur	A
   DTC reoccurs	B

   B:  GO TO DTC CHART 

   A: Go to next step 

3. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. Terminals of ECU (See TERMINALS OF ECU ).
4. ADJUST, REPAIR OR REPLACE 
5. CONFIRMATION TEST 

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