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 (OFF)
ON
      

Is data list values correct?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Go to step 2.
2.
Combination light switch check:

Combination light switch test
?1.
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.
Turn the ignition switch to LOCK (0) or press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connectors.

?3.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0) or OFF mode
Combination light switch 12P connector: disconnected
Under-dash fuse/relay box connector N (20P): disconnected
Test circuit
H/L ON SW
Test point 1
Combination light switch 12P connector No. 7 (YEL)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire.?
     
NO
     
     
     
4.
Headlight relay check:

Headlight relay check
?1.
Do the headlight relay test.

Is the headlight relay OK?

     
YES
     
     
     
Repair a short to ground in the wire.?
     
NO
     
     
     
Replace the headlight relay.?