DTC U0122:87 [AUTO LEVELING CONTROL MODULE (E)]

id09027713167b

Without Mazda M Hybrid

Outline

System malfunction location

Communication error with DSC HU/CM

Detection condition

•  The auto leveling control module cannot receive CAN signal from the DSC HU/CM.

Fail-safe

•  The headlight leveling actuator is stopped at the position when the malfunction is determined.

Possible cause

•  Malfunction in CAN communication line between DSC HU/CM and auto leveling control module

System wiring diagram

Not applicable

System malfunction location	Communication error with DSC HU/CM
Detection condition	• The auto leveling control module cannot receive CAN signal from the DSC HU/CM.
Fail-safe	• The headlight leveling actuator is stopped at the position when the malfunction is determined.
Possible cause	• Malfunction in CAN communication line between DSC HU/CM and auto leveling 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 auto leveling control module cannot receive CAN signal from the electronically controlled brake unit.

Fail-safe

•  The headlight leveling actuator is stopped at the position when the malfunction is determined.

Possible cause

•  Malfunction in CAN communication line between electronically controlled brake unit and auto leveling control module

System wiring diagram

Not applicable

System malfunction location	Communication error with electronically controlled brake unit
Detection condition	• The auto leveling control module cannot receive CAN signal from the electronically controlled brake unit.
Fail-safe	• The headlight leveling actuator is stopped at the position when the malfunction is determined.
Possible cause	• Malfunction in CAN communication line between electronically controlled brake unit and auto leveling 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)].)