Exterior Lights Symptom Troubleshooting - LED headlight does not go off
LED headlight does not go off
1.
Combination light switch OFF position check:

Combination light switch OFF position check
?1.
Connect the HDS to the data link connector (DLC).

?2.
Turn the combination light switch OFF.

?3.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
Headlight Switch (HEADLIGHT)
OFF
      

Is data list values correct?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Go to step 2.
2.
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 3.
     
NO
     
     
     
3.
Shorted wire check (H/L ON SW line):

Shorted wire check (H/L ON SW line)
?1.
Disconnect the following connectors.
Body control module connector C (28P)
Automatic lighting/rain sensor 5P connector (with automatic wiper)
Automatic lighting control unit-sensor 5P connector (with automatic lighting and without automatic wiper)

?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
Automatic lighting/rain sensor 5P connector (with automatic wiper): disconnected
Automatic lighting control unit-sensor 5P connector (with automatic lighting and without automatic wiper): disconnected
Test point 1
Combination light switch 12P connector (female terminals) No. 7:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire.?
     
NO
     
     
     
The H/L ON SW wire is OK. Replace the body control module.?
4.
DTC check:

DTC check
?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
     
     
     
Repair a short to power in the H/L HI or H/L LO wire.?