Exterior Lights Symptom Troubleshooting - LED headlight does not come on

WARNING: This page is about a different variant/trim than selected.

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 (Relay Control Module)

DTC Description	DTC

Are any DTCs indicated?

YES

Go to the indicated DTC's troubleshooting .

Go to step 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

Go to the indicated DTC's troubleshooting .

Go to step 3.

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
Signal	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.

Go to step 4.

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

Replace the combination light switch .

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

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Is there battery voltage?

YES

Go to step 6.

Go to step 7.

Open wire check (COMBI_SW_GND(LT) line)

-1. Measure the resistance 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

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Is there 1.0 Ω or less?

YES

The COMBI_SW_GND(LT) wire is OK. Faulty combination light switch; replace the combination light switch .

Repair an open or high resistance in the wire.

Open wire check (H/L_ON_SW line) 2

-1. Disconnect the following connector.

Body control module connector C (28P)

-2. Measure the resistance 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

Courtesy of HONDA, U.S.A., INC.

Is there 1.0 Ω or less?

YES

The H/L_ON_SW wire is OK. Replace the body control module .

Repair an open or high resistance in the wire.