Stop Lamp Switch: Troubleshooting
WARNING: This page is about a different car, the 2016 Hyundai Veloster. However, it is still accessible from the selected car via links, so may be relevant.
- Part diagnosisPART DIAGNOSIS
Items Cause Symptom A waveform inspection is performed using an oscilloscope on each part during vehicle acceleration/braking. (Refer to stop lamp switch 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) 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. 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 diagnosisSYMPTOM DIAGNOSIS
Symptom Part that could be the cause A waveform inspection is performed using an oscilloscope on each part during vehicle acceleration/braking. (Refer to stop lamp switch 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 starting Switch fuse, Relay fuse, Stop lamp switch, Stop signal electronic module, ABS/VDC control module, Each wire, Connector 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 is 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
- Refer to DTC guide when the related DTC codes are displayed.