How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. DTC CHECK 
   1. Check for DTCs and note any codes that are output (See DTC CHECK/CLEAR ).
   2. Delete the DTC.
   3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.
      1. If the DTC does not reoccur, proceed to A.
      2. If the DTC reoccurs, proceed to B.

   B: Go to step 4 

   A: Go to next step 

3. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. See SYSTEM DIAGRAM 
   2. See TERMINALS OF ECU 
4. ADJUST, REPAIR OR REPLACE 
5. CONFIRMATION TEST 

   END