How to Proceed With Troubleshooting

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

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use these procedures to troubleshoot the multiplex communication system.
- *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
3. CHECK DIAGNOSTIC TROUBLE CODE*
(a) Check for DTCs and note any codes that are output.
(b) Delete the DTC.
(c) Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.

Result





B -- Go to step 4
A -- Continue to next step.
4. OVERALL ANALYSIS AND TROUBLESHOOTING
(a) Terminals of ECU
5. ADJUST, REPAIR OR REPLACE
NEXT -- Continue to next step.
6. CONFIRMATION TEST
NEXT -- END