Hyundai Ioniq: Brake System / Stop Lamp Switch. Troubleshooting

Hyundai Ioniq (AE) 2017-2024 Service Manual / Brake System / Brake System / Stop Lamp Switch. Troubleshooting

Troubleshooting
1.
Part diagnosis
Items
Cause
Symptom

Switch fuse
Faulty fuse connection, Damaged fuse
–
DTC Code : P0504
–
Symptom : Shifting gear trouble, Starting failure, Cruise control function cancelation trouble, EPB function cancelation trouble, Stop lamp lighting trouble, ESP OFF light illuminated.
① A waveform inspection is performed using an oscilloscope on each part during vehicle acceleration/braking. (Refer to stop lamp switch circuit inspection procedures)

② 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 cancelation trouble, EPB function cancelation 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 cancelation trouble, EPB function cancelation 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 cancelation trouble, EPB function cancelation trouble, Stop lamp lighting trouble , ESP OFF light illuminated.
Engine control module (ECM)
–
DTC Code : P0504
–
Symptom :Shifting gear trouble,Cruise control function cancelation 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 cancelation trouble, EPB function cancelation trouble
Smart Key Unit (SMK)
–
Starting failure
Electronic parking brake
–
Symptom : EPB function cancelation trouble , ESP OFF light illuminated.
ABS/VDC control module
(Pressure sensor)
–
Symptom : ESP OFF light illuminated.

2.
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
① Inspect waveform using an oscilloscope on each part during vehicle acceleration/braking. (Refer to stop lamp switch circuit inspection Procedures)

② 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 notworking
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

3.
Stop lamp switch system diagnosis

SSEM : Stop Signal Electronic Module
4.
Refer to DTC guide when the related DTC codes are displayed.

    Stop Lamp Switch. Repair procedures

    Removal1.Turn ignition switch OFF and disconnect the negative (-) battery cable.2.Remove the lower crash pad.(Refer to Body - "Crash Pad")3.Remove the knee airbag...

    Parking Brake System

    ..

    Other information:

    Hyundai Ioniq (AE) 2017-2024 Owner's Manual: FCA Warning Message and System Control


    The FCA produces warning messages and warning alarms in accordance with the collision risk levels, such as abrupt stopping of the vehicle in front, insufficient braking distance, or pedestrian detection. Also, it controls the brakes in accordance with the collision risk levels...

    Hyundai Ioniq (AE) 2017-2024 Service Manual: ESP OFF Switch. Repair procedures


    Removal1.Turn ignition switch OFF and disconnect the negative (-) battery cable.2.Remove the crash pad lower cover.(Refer to Body - "Crash Pad")3.Disconnect the crash pad side switch assembly.4.Check the continuity between the switch terminals as the ESP OFF switch is engaged...

    Categories

    Tilt Steering / Telescope Steering

    Adjust the steering wheel so it points toward your chest, not toward your face. Make sure you can see the instrument cluster warning lights and gauges. After adjusting, push the steering wheel both up and down to be certain it is locked in position. Always adjust the position of the steering wheel before driving.

    WARNING

    NEVER adjust the steering wheel while driving. This may cause loss of vehicle control resulting in an accident.

    Hyundai Ioniq. Tilt Steering / Telescope Steering

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