DTC U0076:88 [HEAT PUMP CONTROL UNIT]

id0702l5717900

Outline

System malfunction location

Unit communication error (CAN bus No.3)

Detection condition

•  The heat pump control unit detects a CAN bus communication line (CAN bus No.3) error.

Fail-safe

•  Stops A/C control

Possible cause

•  Malfunction in CAN bus communication line

System wiring diagram

Not applicable

System malfunction location	Unit communication error (CAN bus No.3)
Detection condition	• The heat pump control unit detects a CAN bus communication line (CAN bus No.3) error.
Fail-safe	• Stops A/C control
Possible cause	• Malfunction in CAN bus communication line
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.].)