DTC U0122-87: Communication Error With DSC HU/Cm (Auto Leveling Control Module (Us)): Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0001:88 (AUTO LEVELING CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

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