Climate Control Module (HVAC): DTCs

CLIMATE CONTROL MODULE (HVAC) DTCs

DTC	Description	Possible Causes	Action
B1015-23	Screen On/Off Switch - Signal stuck low	Cannot switch touch screen On/Off; touch screen power button stuck in 'Pressed' position	Check the switch operation. Renew the Climate Control Module/switch pack.
B102E-11	Air Quality Sensor - Circuit short to ground	Air quality sensor circuit short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the air quality sensors and the Climate Control Module.
B102E-12	Air Quality Sensor - Circuit short to battery	Air quality sensor circuit short circuit to power	Refer to the electrical circuit diagrams and check the wiring circuit between the air quality sensors and the Climate Control Module.
B1034-11	Left Front Seat Heater Element - Circuit short to ground	Left seat heater element short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the seat cushion heater and the Climate Control Module.
B1034-15	Left Front Seat Heater Element - Circuit short to battery or open	Left seat heater element short to power or open circuit	Refer to the electrical circuit diagrams and check the wiring circuit between the seat cushion heater and the Climate Control Module.
B1036-11	Right Front Seat Heater Element - Circuit short to ground	Right seat heater element short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the seat cushion heater and the Climate Control Module.
B1036-15	Right Front Seat Heater Element - Circuit short to battery or open	Right seat heater element short to power or open circuit	Refer to the electrical circuit diagrams and check the wiring circuit between the seat cushion heater and the Climate Control Module.
B1038-11	Left Front Seat Heater Sensor - Circuit short to ground	Left seat heater sensor short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the seat temp sensor and the Climate Control Module.
B1038-15	Left Front Seat Heater Sensor - Circuit short to battery or open	Left seat heater sensor short to power or open circuit	Refer to the electrical circuit diagrams and check the wiring circuit between the seat temp sensor and the Climate Control Module.
B103A-11	Right Front Seat Heater Sensor - Circuit short to ground	Right seat heater sensor short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the seat temp sensor and the Climate Control Module.
B103A-15	Right Front Seat Heater Sensor - Circuit short to battery or open	Right seat heater sensor short to power or open circuit	Refer to the electrical circuit diagrams and check the wiring circuit between the seat temp sensor and the Climate Control Module.
B1083-11	Recirculation Damper Motor - Circuit short to ground	Recirculation actuator signal circuit short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the re-circulated air motor and the Climate Control Module.
B1083-15	Recirculation Damper Motor - Circuit short to battery or open	Recirculation actuator signal circuit short to power or open circuit	Refer to the electrical circuit diagrams and check the wiring circuit between the re-circulated air motor and the Climate Control Module.
B1085-1C	Defroster Damper Motor - Circuit voltage out of range	Motor voltage supply under/over limits	Refer to the electrical circuit diagrams and check the wiring circuit between the screen air distribution motor and the Climate Control Module.
B1085-77	Defroster Damper Motor - Commanded position not reachable	Defroster actuator limited movement range compared to expected Defrost vent/register blend door obstruction Actuator fault	Clear the DTC and retest. If the problem persists, remove the defrost vent/register blend door actuator and check the blend flap operation. Renew the actuator.
B1085-87	Defroster Damper Motor - Missing message	Missing response(s) from defrost actuator Connector or harness related issue Actuator fault	Check the defrost vent actuator connector for security and serviceability. Refer to the electrical circuit diagrams and check the wiring circuit between the screen air distribution motor and the Climate Control Module. Renew the actuator.
B1085-98	Defroster Damper Motor - Component or system over temperature	Actuator internal coil temperature over limit Actuator fault	Consider environmental conditions before condemning the actuator. Allow the actuator to cool, clear the DTC and retest. If the problem persists, renew the actuator.
B1087-54	LIN Bus "A" - Missing calibration	Climate Control distribution flap actuator calibration routine has not been run successfully	Using the manufacturers approved diagnostic system, calibrate the Climate Control assembly.
B1087-83	LIN Bus "A" - Value of signal protection calculation incorrect	Invalid LIN signal checksums on Climate Control LIN actuator Bus	Refer to the electrical circuit diagrams and check the Climate Control LIN circuits.
B1087-86	LIN Bus "A" - Signal invalid	Invalid received signals on Climate Control LIN actuator Bus	Refer to the electrical circuit diagrams and check the Climate Control LIN circuits.
B1087-88	LIN Bus "A" - Bus off	Climate Control actuator LIN Bus short to ground or power	Refer to the electrical circuit diagrams and check the Climate Control LIN circuits.
B10B9-11	Blower Control - Circuit short to ground	Climate Control blower motor control output signal short to ground	Refer to the electrical circuit diagrams and check the blower motor control output circuit.
B10B9-12	Blower Control - Circuit short to battery	Climate Control blower motor control output signal short to power	Refer to the electrical circuit diagrams and check the blower motor control output circuit.
B11EE-11	A/C Compressor - Circuit short to ground	A/C compressor output signal short to ground	Refer to the electrical circuit diagrams and check the A/C compressor circuit.
B11EE-12	A/C Compressor - Circuit short to battery	A/C compressor output signal short to power	Refer to the electrical circuit diagrams and check the A/C compressor circuit.
B11EE-13	A/C Compressor - Circuit open	A/C compressor output signal open circuit	Refer to the electrical circuit diagrams and check the A/C compressor circuit.
B11FF-11	A/C Refrigerant Pressure - Circuit short to ground	A/C pressure sensor input signal short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the refrigerant pressure sensor and the Climate Control Module.
B11FF-15	A/C Refrigerant Pressure - Circuit short to battery or open	A/C pressure sensor input signal short to power or open circuit	Refer to the electrical circuit diagrams and check the wiring circuit between the refrigerant pressure sensor and the Climate Control Module.
B11FF-84	A/C Refrigerant Pressure - Signal below allowable range	A/C high pressure below low threshold A/C system leak Incorrect A/C system charge Pressure sensor fault	Check for other A/C system DTCs. Check the A/C system operating pressures and gas charge. Renew the pressure sensor.
B11FF-85	A/C Refrigerant Pressure - Signal above allowable range	A/C high pressure above high threshold Incorrect A/C system charge Pressure sensor fault	Check the A/C system operating pressures and gas charge. Renew the pressure sensor.
B123D-11	Dynamic Stability Control Button - Circuit short to ground	Dynamic Stability Control switch output signal short to ground	Refer to the electrical circuit diagrams and check the wiring circuit between the Dynamic Stability Control switch and the Climate Control Module.
B123D-12	Dynamic Stability Control Button - Circuit short to battery	Dynamic Stability Control switch output signal short to power	Refer to the electrical circuit diagrams and check the wiring circuit between the Dynamic Stability Control switch and the Climate Control Module.
B123D-13	Dynamic Stability Control Button - Circuit open	Dynamic Stability Control switch output signal circuit open circuit	Refer to the electrical circuit diagrams and check the wiring circuit between the Dynamic Stability Control switch and the Climate Control Module.
B12A6-11	Auxiliary Heater Water Pump - Circuit short to ground	Fuel Fired Booster Heater pump short circuit to ground	Refer to the electrical circuit diagrams and check the Fuel Fired Booster Heater water pump circuits. Check the connector for serviceability and security. Clear the DTC and retest. If the problem persists, install a new fuel fired booster heater pump.
B12A6-15	Auxiliary Heater Water Pump - Circuit short to battery or open	Fuel Fired Booster Heater pump short circuit to power or open circuit	Refer to the electrical circuit diagrams and check the Fuel Fired Booster Heater water pump circuits. Check the connector for serviceability and security. Clear the DTC and retest. If the problem persists, install a new fuel fired booster heater pump.
B12AD-11	Left Heat Exchanger Temperature Sensor - Circuit short to ground	Left heater coolant temperature sensor short to ground Sensor fault	Refer to the electrical circuit diagrams and check the circuit between the left heater coolant temperature sensor and the Climate Control Module. Renew the sensor.
B12AD-15	Left Heat Exchanger Temperature Sensor - Circuit short to battery or open	Left heater coolant temperature sensor short to power or open circuit Sensor fault	Refer to the electrical circuit diagrams and check the circuit between the left heater coolant temperature sensor and the Climate Control Module. Renew the sensor.
B12AE-11	Right Heat Exchanger Temperature Sensor - Circuit short to ground	Right heater coolant temperature sensor short to ground Sensor fault	Refer to the electrical circuit diagrams and check the circuit between the right heater coolant temperature sensor and the Climate Control Module. Renew the sensor.
B12AE-15	Right Heat Exchanger Temperature Sensor - Circuit short to battery or open	Right heater coolant temperature sensor short to power or open circuit Sensor fault	Refer to the electrical circuit diagrams and check the circuit between the right heater coolant temperature sensor and the Climate Control Module. Renew the sensor.
B12AF-11	Left Coolant Control Valve - Circuit short to ground	Left coolant control valve output signal short to ground Coolant control valve fault	Refer to the electrical circuit diagrams and check the circuit between the left water valve and the Climate Control Module. Renew the coolant valve.
B12AF-12	Left Coolant Control Valve - Circuit short to battery	Left coolant control valve output signal short to power Coolant control valve fault	Refer to the electrical circuit diagrams and check the circuit between the left water valve and the Climate Control Module. Renew the coolant valve.
B12AF-13	Left Coolant Control Valve - Circuit open	Left coolant control valve open circuit Coolant control valve fault	Refer to the electrical circuit diagrams and check the circuit between the left water valve and the Climate Control Module. Renew the coolant valve.
B12BF-11	Right Coolant Control Valve - Circuit short to ground	Right coolant control valve output signal short to ground Coolant control valve fault	Refer to the electrical circuit diagrams and check the circuit between the right water valve and the Climate Control Module. Renew the coolant valve.
B12BF-12	Right Coolant Control Valve - Circuit short to battery	Right coolant control valve output signal short to power Coolant control valve fault	Refer to the electrical circuit diagrams and check the circuit between the right water valve and the Climate Control Module. Renew the coolant valve.
B12BF-13	Right Coolant Control Valve - Circuit open	Right coolant control valve open circuit Coolant control valve fault	Refer to the electrical circuit diagrams and check the circuit between the right water valve and the Climate Control Module. Renew the coolant valve.
B12B1-11	Heated Washer Jet and Wiper Park Relay - Circuit short to ground	Heated washer jet output short to ground Relay fault	Refer to the electrical circuit diagrams and check the circuit between the washer jet relay and the Climate Control Module. Renew the relay.
B12B1-12	Heated Washer Jet and Wiper Park Relay - Circuit short to battery	Heated washer jet output short to power Relay fault	Refer to the electrical circuit diagrams and check the circuit between the washer jet relay and the Climate Control Module. Renew the relay.
B12B1-13	Heated Washer Jet and Wiper Park Relay - Circuit open	Heated washer jet output open circuit Relay fault	Refer to the electrical circuit diagrams and check the circuit between the washer jet relay and the Climate Control Module. Renew the relay.
B12B2-11	AUX Heater Coolant Diverter Valve - Circuit short to ground	HVAC coolant diverter valve output signal short to ground	Refer to the electrical circuit diagrams and check the circuit between the fuel burning booster heater Div Valve/Non-return valve and the Climate Control Module.
B12B2-12	AUX Heater Coolant Diverter Valve - Circuit short to battery	Heating and ventilation coolant diverter valve output signal short to power	Refer to the electrical circuit diagrams and check the circuit between the fuel burning booster heater Div Valve/Non-return valve and the Climate Control Module.
B12B2-13	AUX Heater Coolant Diverter Valve - Circuit open	Heating and ventilation coolant diverter valve output signal open circuit	Refer to the electrical circuit diagrams and check the circuit between the fuel burning booster heater Div Valve/Non-return valve and the Climate Control Module.
B12B3-11	Air Quality Sensor Heater Supply - Circuit short to ground	Air quality sensor heater power supply circuit short to ground	Refer to the electrical circuit diagrams and check the air quality sensor heater power circuit between the sensor and the Climate Control Module.
B12B3-12	Air Quality Sensor Heater Supply - Circuit short to battery	Air quality sensor heater power supply circuit short to power	Refer to the electrical circuit diagrams and check the air quality sensor heater power circuit between the sensor and the Climate Control Module.
B12B3-13	Air Quality Sensor Heater Supply - Circuit open	Air quality sensor heater power supply circuit open circuit	Refer to the electrical circuit diagrams and check the air quality sensor heater power circuit between the sensor and the Climate Control Module.
B12B9-16	Auxiliary Heater Control Module - Circuit voltage below threshold	Fuel Fired Booster Heater Control Module power supply above maximum limit Charging system fault	Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
B12B9-17	Auxiliary Heater Control Module - Circuit voltage above threshold	Fuel Fired Booster Heater Control Module power supply below minimum limit Fuel Fired Booster Heater circuit fault Battery charge state Charging system fault	Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
B12B9-43	Auxiliary Heater Control Module - Special memory failure	Control module internal microcontroller ROM/RAM corruption	Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policies and procedures before renewing the module/unit.
B12B9-49	Auxiliary Heater Control Module - Internal electronic failure	Control module internal microcontroller EEPROM corruption	Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policies and procedures before renewing a module.
B12CF-1C	Face Damper Motor - Circuit voltage out of range	Face air distribution actuator voltage supply under/over limits Face air distribution motor circuit fault Battery charge state Charging system fault	Refer to the electrical circuit diagrams and check the face air distribution motor circuit. Check for charging system DTCs. Check the battery charge condition and charging system voltage output.
B12CF-77	Face Damper Motor - Commanded position not reachable	Face air distribution actuator limited movement range compared to expected Face air distribution flap obstruction or damage	Check the face air distribution mechanism for obstructions. Clear DTC and retest. If the problem persists, renew the Climate Control Module. Refer to the warranty policies and procedures before renewing a module.
B12CF-87	Face Damper Motor - Missing message	One or more missing response(s) from face air distribution actuator Face air distribution circuit fault Actuator fault	Check the face air distribution mechanism for obstructions.
B12CF-98	Face Damper Motor - Component or system over temperature	Face air distribution mode actuator internal coil temperature over limit Actuator fault	Consider environmental conditions before condemning the actuator. Allow the actuator to cool, clear the DTC and retest. If the problem persists, renew the actuator.
B12D0-1C	Foot Damper Motor - Circuit voltage out of range	Foot air distribution actuator voltage supply under/over limits Foot air distribution motor circuit fault Battery charge state Charging system fault	Refer to the electrical circuit diagrams and check the foot air distribution motor circuit. Check for charging system DTCs. Check the battery charge condition and charging system voltage output.
B12D0-77	Foot Damper Motor - Commanded position not reachable	Foot air distribution actuator limited movement range compared to expected Foot air distribution flap obstruction or damage	Check the foot air distribution mechanism for obstructions. Clear DTC and retest. If the problem persists, renew the Climate Control Module. Refer to the warranty policies and procedures before renewing a module.
B12D0-87	Foot Damper Motor - Missing message	One or more missing response(s) from foot air distribution actuator Foot air distribution circuit fault Actuator fault	Check the foot air distribution mechanism for obstructions.
B12D0-98	Foot Damper Motor - Component or system over temperature	Foot air distribution mode actuator internal coil temperature over limit Actuator fault	Consider environmental conditions before condemning the actuator. Allow the actuator to cool, clear the DTC and retest. If the problem persists, renew the actuator.
B12D1-1C	Dynamic Air Pressure Damper Motor - Circuit voltage out of range	Incoming airflow actuator voltage supply under/over limits Incoming airflow motor circuit fault Battery charge state Charging system fault	Refer to the electrical circuit diagrams and check the incoming airflow motor circuit. Check for charging system DTCs. Check the battery charge condition and charging system voltage output.
B12D1-77	Dynamic Air Pressure Damper Motor - Commanded position not reachable	Incoming airflow actuator limited movement range compared to expected Foot air distribution flap obstruction or damage	Check the incoming airflow distribution mechanism for obstructions. Clear DTC and retest. If the problem persists, renew the Climate Control Module. Refer to the warranty policies and procedures before renewing a module.
B12D1-87	Dynamic Air Pressure Damper Motor - Missing message	One or more missing response(s) from incoming airflow actuator Incoming airflow distribution circuit fault Actuator fault	Check the incoming airflow distribution mechanism for obstructions.
B12D1-98	Dynamic Air Pressure Damper Motor - Component or system over temperature	Incoming airflow distribution mode actuator internal coil temperature over limit Actuator fault	Consider environmental conditions before condemning the actuator. Allow the actuator to cool, clear the DTC and retest. If the problem persists, renew the actuator.
B12D2-11	Screen On/Off LED - Circuit short to ground	Infotainment LED output short to ground (LED not working)	Refer to the electrical circuit diagrams and check the On/Off tell tail circuit between the Climate Control Module and the touch screen.
B12D2-12	Screen On/Off LED - Circuit short to battery	Infotainment LED output short to power (LED permanently on)	Refer to the electrical circuit diagrams and check the On/Off tell tail circuit between the Climate Control Module and the touch screen.
B1A59-11	Sensor 5 Volt Supply - Circuit short to ground	5 volt supply short circuit to ground	NOTE: This supply voltage feeds multiple circuits Refer to the electrical circuit diagrams and check circuits - C1629-2 - C1629-3 - C1629- 4 - C0923-17 - for circuit short to ground
B1A59-12	Sensor 5 Volt Supply - Circuit short to battery	5 volt supply short circuit to power	NOTE: This supply voltage feeds multiple circuits Refer to the electrical circuit diagrams and check circuits - C1629-2 - C1629-3 - C1629- 4 - C0923-17 - for circuit short to power
B1A61-07	Cabin Temperature Sensor - Mechanical Failures	In vehicle temperature sensor fan motor failure	Sensor is an internal part of the control module. Refer to the warranty policies and procedures before renewing the module/unit.
B1A61-49	Cabin Temperature Sensor - Internal electronic failure	In vehicle temperature sensor/motor failure	Sensor is an internal part of the control module. Refer to the warranty policies and procedures before renewing the module/unit.
B1A63-12	Right Solar Sensor - Circuit short to battery	Right solar sensor input short circuit to power	Refer to the electrical circuit diagrams and check the sunlight sensor circuit between the Climate Control Module and the sensor. Renew the sensor.
B1A63-14	Right Solar Sensor - Circuit short to ground or open	Right solar sensor input short circuit to ground or open	Refer to the electrical circuit diagrams and check the sunlight sensor circuit between the Climate Control Module and the sensor. Renew the sensor.
B1A64-12	Left Solar Sensor - Circuit short to battery	Left solar sensor input short circuit to power	Refer to the electrical circuit diagrams and check the sunlight sensor circuit between the Climate Control Module and the sensor. Renew the sensor.
B1A64-14	Left Solar Sensor - Circuit short to ground or open	Left solar sensor input short circuit to ground or open	Refer to the electrical circuit diagrams and check the sunlight sensor circuit between the Climate Control Module and the sensor. Renew the sensor.
B1B71-11	Evaporator Temperature Sensor - Circuit short to ground	Evaporator sensor input signal short to ground	Refer to the electrical circuit diagrams and check the evaporator sensor circuit. Renew the sensor.
B1B71-15	Evaporator Temperature Sensor - Circuit short to battery or open	Evaporator sensor input signal short to power	Refer to the electrical circuit diagrams and check the evaporator sensor circuit. Renew the sensor.
B1B72-12	LIN Bus #1 Power Supply Circuit - Circuit short to battery	LIN BUS power supply circuit short circuit to power	Check the LIN circuits. Refer to the electrical circuit diagrams.
B1B72-14	LIN Bus #1 Power Supply Circuit - Circuit short to ground or open	LIN BUS power supply circuit short circuit to ground or open circuit	Check the LIN circuits. Refer to the electrical circuit diagrams.
B1C30-11	Disable Switch - Park Aid - Circuit short to ground	Cannot disable parking distance Control Parking distance Control output signal short to ground	Refer to the electrical circuit diagrams and check the output circuit from the Climate Control unit to the parking distance Control module.
B1C30-12	Disable Switch - Park Aid - Circuit short to battery	Cannot disable parking distance Control Parking distance Control output signal short to power	Refer to the electrical circuit diagrams and check the output circuit from the Climate Control unit to the parking distance Control module.
B1C30-13	Disable Switch - Park Aid - Circuit open	Cannot disable parking distance Control Parking distance Control output signal open circuit	Refer to the electrical circuit diagrams and check the output circuit from the Climate Control unit to the parking distance Control module.
B1D22-11	Coolant Temperature Sensor - Circuit short to ground	Fuel Fired Booster Heater internal control module sensor circuit short circuit to ground	Renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policy and Procedures information if a module is suspect.
B1D22-15	Coolant Temperature Sensor - Circuit short to battery or open	Fuel Fired Booster Heater internal control module sensor circuit short circuit to power Sensor circuit high resistance	Renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policy and Procedures information if a module is suspect.
B1D23-64	Overheat Sensor - Signal plausibility failure	Fuel Fired Booster Heater internal control module sensor circuit overheat condition detected. Fuel Fired Booster Heater in lock-out mode	Consider environmental conditions before condemning the unit. Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policy and Procedures information if a module is suspect.
B1D24-11	Glow Plug - Circuit short to ground	Fuel Fired Booster Heater internal control module glow plug circuit short circuit to ground	Run the 'AHCM Activation Test' on SDD. Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
B1D24-15	Glow Plug - Circuit short to battery or open	Fuel Fired Booster Heater internal control module glow plug circuit short circuit to power Glow plug circuit high resistance	Run the 'AHCM Activation Test' on SDD. Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
B1D24-64	Glow Plug - Signal plausibility failure	The Fuel Fired Booster Heater internal sensor has detected flame before heater combustion is activated	Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policy and Procedures information if a module is suspect.
B1D25-11	Heater Fuel Pump - Circuit short to ground	Fuel Fired Booster Heater internal pump circuit short circuit to ground	Refer to the electrical circuit diagrams and check the Fuel Fired Booster Heater fuel pump circuits. Check the connector for serviceability and security. Clear the DTC and retest. If the problem persists, install a new fuel fired booster heater pump.
B1D25-15	Heater Fuel Pump - Circuit short to battery or open	Fuel Fired Booster Heater internal pump circuit short circuit to power Pump circuit high resistance	Refer to the electrical circuit diagrams and check the Fuel Fired Booster Heater fuel pump circuits. Check the connector for serviceability and security. Clear the DTC and retest. If the problem persists, install a new fuel fired booster heater pump.
B1D26-11	Combustion Air Blower - Circuit short to ground	Fuel Fired Booster Heater internal control module combustion air fan circuit short circuit to ground	Renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policy and Procedures information if a module is suspect.
B1D26-15	Combustion Air Blower - Circuit short to battery or open	Fuel Fired Booster Heater internal control module combustion air fan circuit short circuit to power Combustion air fan circuit high resistance	Renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article. Refer to the warranty policy and Procedures information if a module is suspect.
B1D27-11	Heater Coolant Pump - Circuit short to ground	Heater coolant pump circuit short circuit to ground	Refer to the electrical circuit diagrams and check the circuit between the water pump and the Climate Control Module. Renew the water pump.
B1D27-15	Heater Coolant Pump - Circuit short to battery or open	Heater coolant pump circuit short circuit to power Heater coolant pump circuit high resistance	Refer to the electrical circuit diagrams and check the circuit between the water pump and the Climate Control Module. Renew the water pump.
B1D29-00	No Start, Even After Restart Attempt - No sub type information	No flame detected in Fuel Fired Booster Heater, even after restart attempt	Check the fuel supply to the Fuel Fired Booster Heater. Refer to the electrical circuit diagrams and check the Fuel Fired Booster Heater fuel pump circuits. Check the connector for serviceability and security. Check the heater exhaust system for security. If all checks are OK, run the 'Fuel Priming' Routine on SDD. Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
B1D32-00	Multiple Flame Interruption During Heating Cycle - No sub type information	Fuel Fired Booster Heater flame/burn condition interrupted more than a specified number of times in heating cycle (but heater was able to re-ignite flame)	Check the fuel supply to the Fuel Fired Booster Heater. Refer to the electrical circuit diagrams and check the Fuel Fired Booster Heater fuel pump circuits. Check the connector for serviceability and security. Check the heater exhaust system for security. If all checks are OK, run the 'Fuel Priming' Routine on SDD. Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
B1D33-00	Flame Interruption During Normal Operation - No sub type information	Fuel Fired Booster Heater flame/burn condition interrupted more than a specified number of times in heating cycle (heater was unable to re-ignite flame)	Check the fuel supply to the Fuel Fired Booster Heater. Refer to the electrical circuit diagrams and check the Fuel Fired Booster Heater fuel pump circuits. Check the connector for serviceability and security. Check the heater exhaust system for security. If all checks are OK, run the 'Fuel Priming' Routine on SDD. Clear the DTC and retest. If the problem persists, renew the Fuel Fired Booster Heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
U0010-00	Medium Speed CAN Communication Bus - No sub type information	Medium speed CAN BUS off	Check for other CAN Bus off codes. Refer to the electrical circuit diagrams and check the module connector and power/ground circuits. Refer to network communication instructions of the workshop information. Using the manufacturers approved diagnostic system, complete a CAN integrity test.
U0028-88	Vehicle Communication Bus A - Bus off	K-BUS short circuit to power or ground	Refer to the electrical circuit diagrams and check the K-BUS circuit between the Climate Control Module and the Fuel Fired Booster Heater. Refer to the Network Communications instructions of the workshop information.
U0140-00	Lost Communication With Body Control Module - No sub type information	Loss of CAN communication with Central Junction Box CAN circuit fault	Check for other modules reporting CAN Bus off or lost communication faults. Check CAN wiring. Using the manufacturer approved diagnostic system, complete a CAN integrity test. Refer to the electrical circuit diagrams and check the module CAN, power and ground circuits. Refer to the Network Communications instructions of the workshop information.
U0164-00	Lost Communication With HVAC Control Module - No sub type information	Fuel Fired Booster Heater Control Module missing message Central Junction Box missing message Information pack missing message	Check for other modules reporting CAN Bus off or lost communication faults. Check CAN wiring. Using the manufacturer approved diagnostic system, complete a CAN integrity test. Refer to the electrical circuit diagrams and check the module CAN, power and ground circuits. Refer to the Network Communications instructions of the workshop information. Clear the DTCs and test the system for normal operation. If the concern persists, install a new fuel fired booster heater. Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel or Refer to Fuel Fired Booster Heater - TDV8 3.6L Diesel article.
U0166-00	Lost Communication With Auxiliary Heater Control Module - No sub type information	No or limited K-Bus Communication with Fuel Fired Booster Heater Control Module CAN circuit fault	Refer to the electrical circuit diagrams and check the K-BUS circuit between the Fuel Fired Booster Heater Control Module and the Central Junction Box. Refer to the Network Communications instructions of the workshop information.
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	Check for other modules reporting CAN Bus off or lost communication faults. If other modules report problems, check the software version in the Central Junction Box using the manufacturers approved diagnostic system. If no other modules report problems, check the software version in the Transmission Control Module. Update as necessary.
U1000-00	Solid State Driver Protection Activated -Driver Disabled - No sub type information	Control module internal output driver is disabled due to a fault condition detected on the output circuit to protect the control module. Another DTC will be logged to show which specific output has the error	NOTE: The fault must be rectified on the output circuit before the DTC is cleared. Repeated logs of this DTC will result in unrecoverable control module shutdown to prevent module damage. Check for other DTCs to determine which output circuit has the fault. Refer to the electrical circuit diagrams and check the relevant output circuits.
U2002-23	Switch - Signal stuck low	A-surface Climate Control switch stuck	Check the switch operation. Renew the Climate Control Module/switch pack.
U201A-56	Control Module Main Calibration Data - Invalid/incomplete configuration	Incorrect calibration file downloaded to control module	Configure the module using the approved diagnostic system.
U2101-56	Control Module Configuration Incompatible - Invalid/incomplete configuration	Incorrect car configuration parameters	Configure the module using the approved diagnostic system.
U3000-41	Control Module - General checksum failure	Internal software corruption	Configure the module using the approved diagnostic system.
U3003-62	Battery Voltage - Signal compare failure	Climate Control module voltage to vehicle voltage mis-match	Check vehicle battery and charging system. Refer to the relevant instructions in the workshop information. Refer to the electrical circuit diagrams and check the power supply and ground circuits to the module.