How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
The intelligent tester can be used at step 4, 5, 6, 12.
- VEHICLE BROUGHT TO WORK SHOP
- CUSTOMER PROBLEM ANALYSIS
- Confirm problem symptoms.
- PROBLEM SYMPTOM CONFIRMATION
SYMPTOM DOES NOT OCCUR (GO TO STEP 4)
SYMPTOM OCCURS (GO TO STEP 5)
- CHECK BODY MULTIPLEX COMMUNICATION SYSTEM
- Check for the DTC outputs.
MULTIPLEX DTC OUTPUTS (PROCEED TO " DIAGNOSTIC TROUBLE CODE TABLE ")
NO MULTIPLEX DTC (GO TO STEP 5)
- DTC CHECK (OTHER THAN MULTIPLEX DTC)
MALFUNCTION CODE (GO TO STEP 6)
NORMAL CODE (GO TO STEP 7)
- DTC CHART
GO TO STEP 9
- PROBLEM SYMPTOMS TABLE
- TERMINALS OF ECU
- CIRCUIT INSPECTION
- IDENTIFICATION OF PROBLEM
- REPAIR OR REPLACE
- CONFIRMATION TEST
NEXT: END