How to Proceed With Troubleshooting

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use this procedure to troubleshoot the multiplex communication system.
- The Techstream should be used in step 2.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. DTC CHECK
(a) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.
(b) Delete the DTC.
(c) 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 DTC chart
A -- Continue to next step.
3. OVERALL ANALYSIS AND TROUBLESHOOTING
(a) System diagram Multiplex Communication System
(b) Terminals of ECU Multiplex Communication System
NEXT -- Continue to next step.
4. ADJUST, REPAIR OR REPLACE
NEXT -- Continue to next step.
5. CONFIRMATION TEST
NEXT -- END