Climate Control Module (HVAC)

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00

NOTE: If the control module is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior to the installation of a new module.

NOTE: Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra information read by the manufacturer-approved diagnostic system).

NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places and with a current calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.

NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.

The table below lists all diagnostic trouble codes (DTCs) that could be logged in the climate control module, for additional diagnosis and testing information. For additional information, refer to: CONTROL COMPONENTS .

DTC	Description	Possible Cause	Action
B105A-01	Aspirator fan fault	Aspirator fan circuit - short to ground, open circuit Aspirator fan component fault	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A59-11	Recirculation servo motor actuator - sensor 5 volt supply	Sensor 5 volt supply - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A59-13	Air conditioning pressure sensor - sensor 5 volt supply	Air conditioning pressure sensor 5 volt supply - open circuit	Refer to electrical circuit diagrams and test air conditioning pressure sensor circuit for open circuit
B1A61-11	In car temperature sensor circuit - short to ground	In car temperature sensor circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A61-15	In car temperature sensor circuit - short to power, open circuit	In car temperature sensor circuit - short to power, open circuit	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A62-11	Air conditioning pressure sensor - short to ground	Air conditioning pressure sensor circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A62-15	Air conditioning pressure sensor - short to power, open circuit	Air conditioning pressure sensor circuit - short to power, open circuit	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A63-11	Right hand sun load sensor - short to ground	Right hand sun load sensor circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A64-11	Left hand sun load sensor - short to ground	Left hand sun load sensor circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A67-13	Vehicle sensor ground - open circuit	Vehicle sensor ground - open circuit	Refer to electrical circuit diagrams and test vehicle sensor ground circuit for open circuit
B1A69-01	Humidity sensor fault	Humidity sensor circuit - short to power, ground, open circuit Sensor component fault	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A69-01	Humidity sensor fault			B1A70-01
B1A98-15	Stepper motor actuator LIN Bus fault, or power supply - open circuit	No response from ALL steppers for 20 seconds - LIN network fault	Refer to electrical circuit diagrams and test stepper motor actuator LIN Bus for open circuit
B1B60-13	Recirculation servo motor actuator - sensor 5 volt supply	Sensor 5 volt supply - open circuit	Refer to electrical circuit diagrams and test sensor 5 volt supply for open circuit
B1B61-11	Pollution sensor HC input - short to ground	Pollution sensor HC input - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B62-11	Pollution sensor Nox input - short to ground	Pollution sensor Nox input - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B63-13	Recirculation servo motor actuator - ground circuit	Recirculation servo motor actuator ground - open circuit	Refer to electrical circuit diagrams and test recirculation servo motor actuator ground for open circuit
B1B67-11	Recirculation servo potentiometer - short to ground	Recirculation servo potentiometer circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B67-15	Recirculation servo potentiometer - short to power, open circuit	Recirculation servo potentiometer circuit - short to power, open circuit	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B68-01	Recirculation servo motor fault	Recirculation servo potentiometer circuit - short to power, ground, open circuit Recirculation door/linkage broken	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B71-11	Evaporator temperature sensor - short to ground	Evaporator temperature sensor circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B71-15	Evaporator temperature sensor - short to power, open circuit	Evaporator temperature sensor circuit - short to power, open circuit	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B72-11	Stepper motor actuator LIN Bus power supply - short to ground	Stepper motor actuator LIN Bus power supply - short to ground	Refer to electrical circuit diagrams and test stepper motor actuator LIN Bus power supply for short to ground
B1B74-00	Defrost stepper motor actuator fault	Internal or external fault - under/over voltage	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B74-49	Defrost stepper motor actuator fault	Internal electronic fault - motor over temperature	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B75-00	Panel/foot stepper motor actuator fault	Internal or external fault - under/over voltage	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B75-49	Panel/foot stepper motor actuator fault	Internal electronic fault - motor over temperature	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B76-00	Front left air blend stepper motor actuator fault	Internal or external fault - under/over voltage	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B76-49	Front left air blend stepper motor actuator fault	Internal electronic fault - motor over temperature	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B77-00	Front right air blend stepper motor actuator fault	Internal or external fault - under/over voltage	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B77-49	Front right air blend stepper motor actuator fault	Internal electronic fault - motor over temperature	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1B78-84	Air conditioning system under pressure	Signal below allowable range System leak Incorrect refrigerant charge weight	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system. Check system for leaks. Charge system with correct weight of refrigerant
B1B78-85	Air conditioning system over pressure	Signal above allowable range	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U0010-88	Medium speed CAN communication	Bus off	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U0300-00	Internal control module software incompatibility	Invalid configuration message is received	Re-configure the RJB using the manufacturer approved diagnostic system. Clear the DTC and retest. If the DTC is still logged suspect the climate control module, refer to the new module installation note at the top of the DTC Index
U1A14-49	Failed to initialise CAN	Internal electronic failure	Install a new climate control module, refer to the new module installation note at the top of the DTC Index
U3000-55	Stored vehicle configuration data does not match	Incorrect car configuration data received	Re-configure the RJB using the manufacturer approved diagnostic system. Clear DTC and re-test. If the DTC remains suspect the climate control module, refer to the new module installation note at the top of the DTC Index
U3000-87	Control Module	Missing message	Re-configure the RJB using the manufacturer approved diagnostic system. Check climate control module for DTCs and refer to the DTC Index. Check CAN network integrity using the manufacturer approved diagnostic system
U3002-81	Vehicle Identification Number (VIN)	Vehicle/component mis-match. Corrupt VIN data being transmitted, module previously installed to other vehicle	Install original module, check for DTCs and refer to relevant DTC Index