Inspection Procedure
WARNING: This page is about a different car, the 2002 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE OF OBD II SCAN TOOL OR LEXUS HAND-HELD TESTER
- Connect the LEXUS hand-held tester to the DLC3.
- Check the stop light switch using DATA LIST.
Driver Side J/B ECU:
DRIVER SIDE J/B ECU INSPECTIONDescription Tester display Check condition Stop light switch STOP LIGHT SW ON - OFF - OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOM TABLE, SEE PROBLEM SYMPTOMS TABLE .
- NG: GO TO NEXT STEP.
- INSPECT STOP LAMP SWITCH ASSEMBLY
- Disconnect the stop light switch connector.
STOP LAMP SWITCH ASSEMBLY INSPECTIONSwitch position Tester connection Specified condition Switch pin free 1-2 Continuity Switch pin free 3-4 No continuity switch pin pushed in 1-2 No continuity switch pin pushed in 3-4 Continuity - NG: REPLACE STOP LAMP SWITCH ASSEMBLY
- OK: GO TO NEXT STEP.
- CHECK HARNESS AND CONNECTOR
- Check for open and short circuit in harness and connector between terminal STP1 of driver side J/B ECU and stop light switch.
- NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
- OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOM TABLE, SEE PROBLEM SYMPTOMS TABLE .