DTC U0164:00 [HEAT PUMP CONTROL UNIT]


id0702l5718200


Outline

System malfunction location

Communication error with dash-electrical supply unit

Detection condition
•  The heat pump control unit cannot receive a CAN signal from the dash-electrical supply unit.
Fail-safe
•  The value of the data which is not received from the dash-electrical supply unit is fixed at the specified value.
Possible cause
•  Malfunction in CAN communication line between dash-electrical supply unit and heat pump control unit
System wiring diagram
Not applicable


Diagnostic Procedure

•  Perform the malfunction diagnosis according to the troubleshooting procedure for the multiplex communication system.(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)