Hyundai Sonata: Troubleshooting - Lighting System - Body Electrical SystemHyundai Sonata: Troubleshooting

Troubleshooting

1.
The lamp switch inputs can be checked using the GDS.
2.
To check the input value of lamp switch, select option "Body Control Module".
3.
To consult the present input/output value of BCM, "Current DATA". It provides information of BCM input/output conditions of power supply, turn signal/brake lamp, headlamp, door, locks, outside mirror, wiper, auto-light and transmitters etc.
4.
To check the input value of lamp switch in force mode, select option "Actuation Test of smart junction box".
Symptom
 Possible cause
 Remedy
One lamp does not light
(all exterior)
 Bulb burned out
 Replace bulb
Socket, wiring or ground faulty
 Repair if necessary
Stop lamps do not light
 Bulb burned out
 Replace bulb
Stop lamp fuse (15A) blown
 Check for short and replace fuse
Stop lamp switch faulty
 Adjust or replace switch
Wiring or ground faulty
 Repair if necessary
Stop lamps do not turn off
 Stop lamp switch faulty
 Repair or replace switch
Instrument lamps do not light
(Tail lamps light)
 Rheostat faulty
 Check rheostat
Wiring or ground faulty
 Repair if necessary
Back up lamps do not light
 Bulb burned out
 Replace bulb
Back up lamp fuse (10A) blown
 Check for short and replace fuse
Back up lamp switch (M/T) faulty
 Check switch
Transaxle range switch (A/T) faulty
 Check switch
Wiring or ground faulty
 Repair if necessary
Map lamp does not light
 Bulb burned out
 Replace bulb
Room lamp fuse (10A) blown
 Check for short and replace fuse
Map lamp switch faulty
 Check switch
Wiring or ground faulty
 Repair if necessary
Luggage room lamp does not light
 Bulb burned out
 Replace bulb
Trunk lamp fuse (10A) blown
 Check for short and replace fuse
Luggage room lamp switch faulty
 Check switch
Wiring or ground faulty
 Repair if necessary


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