DTC U0122:87 [ADAPTIVE LED HEADLIGHTS CONTROL MODULE]

id1502c1065100

Without Mazda M Hybrid

Outline

System malfunction location

Communication error with DSC HU/CM

Detection condition

•  The adaptive LED headlights control module cannot receive CAN signal from the DSC HU/CM.

Fail-safe

•  Perform the following controls with the adaptive LED headlights turned on.

―  Turn off glare-free high beam.

―  Set wide-range low beam as basic light distribution.

•  Control of the headlight auto leveling system is continued.

Possible cause

•  Malfunction in CAN communication line between DSC HU/CM and adaptive LED headlights control module

System wiring diagram

Not applicable

System malfunction location	Communication error with DSC HU/CM
Detection condition	• The adaptive LED headlights control module cannot receive CAN signal from the DSC HU/CM.
Fail-safe	• Perform the following controls with the adaptive LED headlights turned on. ― Turn off glare-free high beam. ― Set wide-range low beam as basic light distribution. • Control of the headlight auto leveling system is continued.
Possible cause	• Malfunction in CAN communication line between DSC HU/CM and adaptive LED headlights control module
System wiring diagram	Not applicable

Diagnostic Procedure

• Perform an inspection in accordance with the multiplex communication system diagnostic procedure. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

With Mazda M Hybrid

Outline

System malfunction location

Communication error with electronically controlled brake unit

Detection condition

•  The adaptive LED headlights control module cannot receive CAN signal from the electronically controlled brake unit.

Fail-safe

•  Perform the following controls with the adaptive LED headlights turned on.

―  Turn off glare-free high beam.

―  Set wide-range low beam as basic light distribution.

•  Control of the headlight auto leveling system is continued.

Possible cause

•  Malfunction in CAN communication line between electronically controlled brake unit and adaptive LED headlights control module

System wiring diagram

Not applicable

System malfunction location	Communication error with electronically controlled brake unit
Detection condition	• The adaptive LED headlights control module cannot receive CAN signal from the electronically controlled brake unit.
Fail-safe	• Perform the following controls with the adaptive LED headlights turned on. ― Turn off glare-free high beam. ― Set wide-range low beam as basic light distribution. • Control of the headlight auto leveling system is continued.
Possible cause	• Malfunction in CAN communication line between electronically controlled brake unit and adaptive LED headlights control module
System wiring diagram	Not applicable

Diagnostic Procedure

• Perform an inspection in accordance with the multiplex communication system diagnostic procedure. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)