DTC B1437:86 [ADAPTIVE LED HEADLIGHTS CONTROL MODULE]

id1502c1000800

System malfunction location

Communication error with front combination light (LH)

Detection condition

•  The adaptive LED headlight control module received error signals from the front combination light (LH) for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe

•  When the setting is on using the personalization feature, the headlights HI turn on. (When setting is off using personalization feature, headlight HI illumination on/off depends on control by front body control module (FBCM))

•  Control of the headlight auto leveling system is continued.

Possible cause

•  Front combination light (LH) malfunction

•  Adaptive LED headlights control module malfunction

System wiring diagram

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System malfunction location	Communication error with front combination light (LH)
Detection condition	• The adaptive LED headlight control module received error signals from the front combination light (LH) for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe	• When the setting is on using the personalization feature, the headlights HI turn on. (When setting is off using personalization feature, headlight HI illumination on/off depends on control by front body control module (FBCM)) • Control of the headlight auto leveling system is continued.
Possible cause	• Front combination light (LH) malfunction • Adaptive LED headlights control module malfunction
System wiring diagram	—

Diagnostic Procedure

Step	Inspection		Action
1	PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS FRONT COMBINATION LIGHT (LH) • Clear the adaptive LED headlights control module DTCs using the M-MDS. (See CLEARING DTC [ADAPTIVE LED HEADLIGHTS CONTROL MODULE].) • Switch the ignition ON (engine off or on) and wait for 5 s or more. • Perform the DTC inspection for the adaptive LED headlights control module using the M-MDS. (See DTC INSPECTION [ADAPTIVE LED HEADLIGHTS CONTROL MODULE].) • Is the same DTC displayed?	Yes	Replace the front combination light (LH), then go to the next step. (See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.)
1		No	Go to Step 3.
2	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the adaptive LED headlights control module DTCs using the M-MDS. (See CLEARING DTC [ADAPTIVE LED HEADLIGHTS CONTROL MODULE].) • Switch the ignition ON (engine off or on) and wait for 5 s or more. • Perform the DTC inspection for the adaptive LED headlights control module using the M-MDS. (See DTC INSPECTION [ADAPTIVE LED HEADLIGHTS CONTROL MODULE].) • Is the same DTC displayed?	Yes	Replace the adaptive LED headlights control module, then go to the next step. (See ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION.)
2		No	Go to the next step.
3	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [ADAPTIVE LED HEADLIGHTS CONTROL MODULE].)
3		No	DTC troubleshooting completed.