Monitor Scan Tool Data
- Connect scan tool to Data Link Connector (DLC)
- Ignition "ON" & Engine "OFF".
- Press the brake pedal.
- Monitor the "Brake lamp switch" parameter on the scan tool.
- Whenever Brake pedal is pushed down, is the brake lamp switch's scan tool 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
- Perform Harness Inspection and repair as necessary.