Monitor GDS Data
- Connect scantool to Data Link Connector (DLC).
- IG "ON".
- Press the brake pedal.
- Monitor the "Brake Light Switch" parameter on the GDS.
- Whenever Brake pedal is pushed down, is the brake lamp switch's GDS data changed ON/OFF?
YES
- Fault is intermittent caused by poor connection in brake light switch line and/or HECU's connector or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Go to "TERMINAL AND CONNECTOR INSPECTION " procedure.