Open or Short Check
- Turn "ON" the ignition switch.
- Measure voltage between brake light switch signal 'A' terminal of the ESP (ESC) harness connector and chassis ground.
Specification: Brake light switch 'A': 0 V
- Is the result within specifications?
YES
- Fault is intermittent caused by poor connection in brake light switch harness and/or ESP (ESC)'s connector. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Repair open or short in power circuit between battery and ESP (ESC) harness connector and then Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- If there is no problem in circuit, go to "COMPONENT INSPECTION " procedure.