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 

   NEXT: Go to next step 

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	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. Refer to TERMINALS OF ECU .

      NEXT: Go to next step 

4. ADJUST, REPAIR OR REPLACE 

   NEXT: Go to next step 

5. CONFIRMATION TEST 

   NEXT → END