Stop Lamp Switch: Troubleshooting
- Part Diagnosis
Items Cause Symptom Switch fuse Faulty fuse connection, Damaged fuse - DTC Code: P0504
- Symptom: Shifting gear trouble, Starting failure, Cruise control function cancellation trouble, EPB function cancellation trouble, Stop lamp lighting trouble, ESP OFF light illuminated.
- A waveform inspection is performed using an oscilloscope on each part during vehicle acceleration/braking. (Refer to 4. Inspect The Stop Lamp Circuit inspection procedures).
- Refer to the relevant repair procedures of the part when something abnormal is discovered in the waveform (Refer to the repair procedures of the relevant part and if necessary replace it).
Relay fuse Faulty fuse connection, Damaged fuse - DTC Code: P0504
- Symptom: Shifting gear trouble, Starting failure, Cruise control function cancellation trouble, EPB function cancellation trouble, Stop lamp lighting trouble, ESP OFF light illuminated.
Stop lamp switch - Damaged wiring of each part
- Faulty connection to connector
- Each part is defective
- DTC Code: P0504
- Symptom: Shifting gear trouble, Starting failure, Cruise control function cancellation trouble, EPB function cancellation trouble, Stop lamp lighting trouble, ESP OFF light illuminated.
Stop signal electronic module (If it applies) - DTC Code: P0504, C2130, C2131
- Symptom: Shifting gear trouble, Starting failure, Cruise control function cancellation trouble, EPB function cancellation trouble, Stop lamp lighting trouble, ESP OFF light illuminated.
Engine control module (ECM) - DTC Code: P0504
- Symptom: Shifting gear trouble, Cruise control function cancellation trouble
Body control module (BCM) - Shifting gear trouble
Shift-lock solenoid - Shifting gear trouble
Inhibitor switch - Symptom: Shifting gear trouble, Starting failure, Cruise control function cancellation trouble, EPB function cancellation trouble
Smart Key Unit (SMK) - Starting failure
Electronic parking brake - Symptom: EPB function cancellation trouble, ESP OFF light illuminated.
ABS/VDC Control module (Pressure sensor) - Symptom: ESP OFF light illuminated.
- Symptom Diagnosis
Symptom Part that could be the cause Trouble starting Switch fuse, Relay fuse, Stop lamp switch, Stop signal electronic module, ABS/VDC control module, Each wire, Connector - Inspect waveform using an oscilloscope on each part during vehicle acceleration/braking. (Refer to 4. Inspect The Stop Lamp Circuit inspection procedures).
- Refer to the relevant repair procedures of the part when something abnormal is discovered in the waveform (Refer to the repair procedures of the relevant part and if necessary replace it).
Trouble shifting gears Switch fuse, Relay fuse, Stop lamp switch, Stop signal electronic module, BCM, ECM, Inhibitor switch, Each wire, Connector ESP OFF light illuminated Switch fuse, Relay fuse, Stop lamp switch, Stop signal electronic module, ABS/VDC control module, Each wire, Connector P0504 Switch fuse, Relay fuse, Stop lamp switch, Stop signal electronic module, ECM, Each wire, Connector Stop lamp does not working Switch fuse, Relay fuse, Stop lamp switch, Stop signal electronic module, Wire/Connector disconnected Stop lamp always turns on Stop lamp switch, Stop signal electronic module, Wiring short circuit, Damaged fuse - Stop Lamp Switch System Diagnosis
Stop Signal Electronic Module: SSEM
- Refer to the "DTC INDEX (HEV) " when the related DTC codes are displayed.