Rear Climate Control Module (RHVAC): DTCs

REAR CLIMATE CONTROL MODULE (RHVAC) DTCs

DTC	Description	Possible Causes	Action
B1A59-11	Sensor 5 Volt Supply - Circuit short to ground	Face/feet air distribution motor 5 volt supply short circuit to ground	Refer to the electrical circuit diagrams and check the Face/feet air distribution motor 5 volt supply circuit.
B1A67-13	Sensor Ground - Circuit open	Face/feet air distribution motor and evaporator sensor ground circuit open circuit	Refer to the electrical circuit diagrams and check Face/feet air distribution motor and evaporator sensor ground circuit.
B1B7B-01	Left Rear Air Blend Actuator - General electrical failure	Left rear air blend actuator motor locked	Refer to the electrical circuit diagrams and check Left rear air blend actuator motor circuits for open, short circuit. Check the actuator linkage for obstructions or restrictions to movement. Check the motor connector for security and serviceability. Renew the motor.
B1B7B-11	Left Rear Air Blend Actuator - Circuit short to ground	Left rear air blend actuator motor circuit short to ground	Refer to the electrical circuit diagrams and check the motor position (AML) circuit between the rear air conditioning switch pack and the mode motor.
B1B7B-15	Left Rear Air Blend Actuator - Circuit short to battery or open	Left rear air blend actuator motor circuit short to power or open circuit	Refer to the electrical circuit diagrams and check the motor position (AM) circuit between the rear air conditioning switch pack and the mode motor.
B1B7C-01	Right Rear Air Blend Actuator - General electrical failure	Right rear air blend actuator motor locked	Refer to the electrical circuit diagrams and check Right rear air blend actuator motor circuits for open, short circuit. Check the actuator linkage for obstructions or restrictions to movement. Check the motor connector for security and serviceability. Renew the motor.
B1B7C-11	Right Rear Air Blend Actuator - Circuit short to ground	Right rear air blend actuator motor circuit short to ground	Refer to the electrical circuit diagrams and check the motor position (AMR) circuit between the rear air conditioning switch pack and the mode motor.
B1B7C-15	Right Rear Air Blend Actuator - Circuit short to battery or open	Right rear air blend actuator motor circuit short to power or open circuit	Refer to the electrical circuit diagrams and check the motor position (AMR) circuit between the rear air conditioning switch pack and the mode motor.
B1B7D-01	Rear Air Distribution Actuator - General electrical failure	Rear air distribution actuator motor locked	Refer to the electrical circuit diagrams and check rear air distribution actuator circuits for open, short circuit. Check the actuator linkage for obstructions or restrictions to movement. Check the motor connector for security and serviceability. Renew the motor.
B1B7D-11	Rear Air Distribution Actuator - Circuit short to ground	Rear air distribution actuator motor circuit short to ground	Refer to the electrical circuit diagrams and check the face/feet air distribution motor position (AO) circuit between the rear air conditioning switch pack and the mode motor.
B1B7D-15	Rear Air Distribution Actuator - Circuit short to battery or open	Rear air distribution actuator motor circuit short to power or open circuit	Refer to the electrical circuit diagrams and check the face/feet air distribution motor position (AO) circuit between the rear air conditioning switch pack and the mode motor.
B1B81-11	Rear Evaporator Temperature Sensor - Circuit short to ground	Rear evaporator temperature sensor circuit short to ground	Refer to the electrical circuit diagrams and check the sensor circuit. Renew the sensor.
B1B81-15	Rear Evaporator Temperature Sensor - Circuit short to battery or open	Rear evaporator temperature sensor circuit short to power	Refer to the electrical circuit diagrams and check the sensor circuit. Renew the sensor.
B1C0A-09	Rear Control panel - Component Failures	Component failure	Renew the rear Climate Control switch pack.
B1C0A-88	Rear Control panel - Bus off	Communication BUS off	Refer to the Network Communications instructions of the workshop information.
B1C0A-96	Rear Control panel - Component internal failure	Internal component failure	Renew the rear Climate Control switch pack.
B1C0B-11	Rear Refrigerant Magnetic Valve - Circuit short to ground	Rear refrigerant magnetic valve circuit short to ground	Refer to the electrical circuit diagrams and check the magnetic valve circuit. Renew the valve.
U0010-88	Medium Speed CAN Communication Bus - Bus off	Bus off	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network.
U0140-87	Lost Communication With Body Control Module - Missing message	Missing message	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Central Junction Box and Climate Control Module.
U0164-87	Lost Communication With HVAC Control Module - Missing message	CAN Link instrument cluster/ATC module missing message	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Instrument Cluster and Climate Control Module.
U0300-00	Internal Control Module Software Incompatibility - No sub type information	Incorrect MS CAN signal configuration (expulsion mode) CAN bus configuration failure CAN bus short circuit to ground	Refer to the electrical circuit diagrams and check the CAN circuits. Configure the module using the approved diagnostic system.
U0300-55	Internal Control Module Software Incompatibility - Not configured	Not configured	Configure the module using the approved diagnostic system.
U0300-87	Internal Control Module Software Incompatibility - Missing message	Missing message	Configure the module using the approved diagnostic system.
U0401-86	Invalid Data Received from ECM/PCM A - signal invalid	Invalid data received via the CAN Bus High speed CAN bus circuit fault Medium speed CAN bus circuit fault Component internal failure	NOTE: The engine control module is on HS-CAN, the rear automatic temperature control module is on MS-CAN, the instrument cluster is the gateway module and transfers the data from HS-CAN to MS-CAN Check the engine control module and instrument cluster for related stored DTCs. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN network between the engine control module and the instrument cluster, check the medium speed CAN network between the instrument cluster and the rear automatic temperature control module for circuit fault.
U0422-86	Invalid Data Received From Body Control Module - signal invalid	Invalid data received via the medium speed CAN bus Medium speed CAN bus circuit fault Component internal failure	Check the central junction box for related stored DTCs. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the medium speed CAN network between the central junction box and rear automatic temperature control module for circuit fault.
U0424-86	Invalid Data Received From HVAC Control Module - signal invalid	Invalid data received via the medium speed CAN bus Medium speed CAN bus circuit fault Component internal failure	Check the climate control module for related stored DTCs. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the medium speed CAN network between the climate control module and rear automatic temperature control module for circuit fault.
U1A14-49	CAN Initialization Failure - Internal electronic failure	Internal electronic failure	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network.
U3002-81	Vehicle Identification Number - Invalid serial data received	Invalid serial data received Module installed from another vehicle Module incorrectly configured	Configure the module using the approved diagnostic system.