How to Proceed With Troubleshooting

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: 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.





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