Exterior Lights Symptom Troubleshooting - LED headlight does not come on
LED headlight does not come on
1.
DTC check 1:

DTC check 1
?1.
Clear the DTCs with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode then the ON mode.

?3.
Wait for at least 10 seconds.

?4.
Check for Relay Control Module DTCs with the HDS.

DTC Description
DTC
   

Are any DTCs indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 2.
2.
DTC check 2:

DTC check 2
?1.
Connect the HDS to the data link connector (DLC).

?2.
Check for Body Control Module DTCs with the HDS.
DTC Description
DTC
   

Are any DTCs indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Combination light switch HEADLIGHT position check:

Combination light switch HEADLIGHT position check
?1.
Turn the combination light switch ON.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
Headlight Switch (HEADLIGHT)
ON
      

Is data list values correct?

     
YES
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
     
NO
     
     
     
Go to step 4.
4.
Combination light switch check:

Combination light switch check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Do the combination light switch test.

Is the switch OK?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
5.
Open wire check (H/L ON SW line) 1:

Open wire check (H/L ON SW line) 1
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Combination light switch 12P connector: disconnected
Test point 1
Combination light switch 12P connector (female terminals) No. 7:
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
Go to step 7.
6.
Open wire check (COMBI SW GND(LT) line):

Open wire check (COMBI SW GND(LT) line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Combination light switch 12P connector: disconnected
Test point 1
Combination light switch 12P connector (female terminals) No. 6:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The COMBI SW GND(LT) wire is OK. Faulty combination light switch; replace the combination light switch.?
     
NO
     
     
     
Repair an open or high resistance in the wire.?
7.
Open wire check (H/L ON SW line) 2:

Open wire check (H/L ON SW line) 2
?1.
Disconnect the following connector.
Body control module connector C (28P)

?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Combination light switch 12P connector: disconnected
Body control module connector C (28P): disconnected
Test point 1
Combination light switch 12P connector (female terminals) No. 7:
Test point 2
Body control module connector C (28P) No. 9


Is there continuity?

     
YES
     
     
     
The H/L ON SW wire is OK. Replace the body control module.?
     
NO
     
     
     
Repair an open or high resistance in the wire.?