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 in steps 2, 5, 6, 7 and 10.
- VEHICLE BROUGHT TO WORKSHOP
- CHECK AND CLEAR DTCS
- PROBLEM SYMPTOM CONFIRMATION
SYMPTOM DOES NOT OCCUR (GO TO STEP 4)
SYMPTOM OCCURS (GO TO STEP 5)
- SYMPTOM SIMULATION
- CHECK BODY MULTIPLEX COMMUNICATION SYSTEM
- Check for DTC outputs.
MULTIPLEX DTC OUTPUT (PROCEED TO " DIAGNOSTIC TROUBLE CODE TABLE ")
NO MULTIPLEX DTC (GO TO STEP 6)
- CHECK CAN COMMUNICATION SYSTEM
CAN DTC OUTPUTS (PROCEED TO " CAN COMMUNICATION SYSTEM ")
NO CAN DTC (GO TO STEP 7)
- DTC CHECK (OTHER THAN MULTIPLEX DTC)
TROUBLE CODE (GO TO STEP 8)
NORMAL SYSTEM CODE (GO TO STEP 9)
- DTC CHART
GO TO STEP 10
- PROBLEM SYMPTOMS TABLE
- ACTUATOR CHECK
- CIRCUIT INSPECTION
- TERMINALS OF ECU
- IDENTIFICATION OF PROBLEM
- REPAIR OR REPLACE
- CONFIRMATION TEST
NEXT: END