DTC U0010-88; U0155: Climate Control Unit (Full-Auto Air Conditioner): Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0010:88, U0155:00 (CLIMATE CONTROL UNIT - FULL-AUTO AIR CONDITIONER) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	U0010:88: Unit communication error (MS-CAN) U0155:00: Communication error with instrument cluster
Detection condition	U0010:88 The climate control unit detects a CAN bus communication line (MS-CAN) malfunction. U0155:00 The climate control unit could not receive CAN signal from the instrument cluster for 5 s or more.
Fail-safe function	U0010:88 Not applicable U0155:00 The value of the data which is not received from the instrument cluster is fixed at the specified value.
Possible cause	Malfunction in CAN bus communication line Malfunction in CAN line between the climate control unit and instrument cluster
System wiring diagram	Not applicable