:  Dec 17, 2007



Overview

The complexity of the system is such that it is broken down into sub-sections.

For a detailed description of climate control operation, refer to the relevant section of the workshop manual.

Distribution motor self-test

The motor and flap operation can be checked using the on-board distribution motor self-test function.

The self-test can be initiated by pressing and holding the ECON and RECIRC buttons while turning the ignition switch to the ON position.

The control module will then compare the current motor position with the values stored in the module and will indicate an error by flashing the ECON LED (light emitting diode).

If there are no errors, the LED will go out and the system will function normally.

To confirm that there are no errors, turn the ignition switch to the OFF position, then back to the ON position.

Observe the operation of the programmed defrost LED.

If there are errors present, the programmed defrost LED will flash and the system will attempt to calibrate itself.

For additional information on the function of the system, refer to the relevant section of the workshop manual.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Coolant level
  • Air vents (contaminated/blocked)
  • Auxiliary drive belt condition and tension
  • Air conditioning compressor
  • Fuses
  • Harnesses
  • Electrical connector(s)
  • Relays
  • Control module(s)
  • Control panel(s)
  • Air conditioning compressor

. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step

. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.
  Make sure that all DTCs are cleared following rectification.
Make sure that all DTCs are cleared following rectification.

Symptom chart

Symptom Possible causes Action
No climate control function, flashing LED at start-up
  • The system is in calibration mode
Check the motors and levers at the heating and ventilation assembly for damage/foreign objects jamming the movement of the flaps. For additional information on the self-calibration process, see the distribution motor self-test above.
Poor or no cooling
  • Air conditioning function
Carry out the checks from the visual inspection, refer to the relevant section of the workshop manual.

DTC index

:
  Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

DTC Description Possible causes Action
B1A5911 Sensor 5 Volt Supply
  • Ambient air temperature sensor 5 volt supply short circuit to ground
Refer to the electrical guide and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A5913 Sensor 5 Volt Supply
  • Ambient air temperature sensor 5 volt supply high resistance
Refer to the electrical guide and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6111 Cabin Temperature Sensor
  • Ambient air temperature sensor signal short circuit to ground
Refer to the electrical guide and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6115 In-Vehicle Temperature Sensor Signal
  • Ambient air temperature sensor signal high resistance
  • In-vehicle temperature sensor signal short circuit to power
Refer to the electrical guide and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6211 Pressure Sensor
  • A/C refrigerant pressure sensor signal short circuit to ground
Refer to the electrical guide and check the pressure sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6215 Pressure Sensor
  • A/C refrigerant pressure sensor signal short circuit to power
Refer to the electrical guide and check the pressure sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6312 Right Solar Sensor
  • Right-hand solar sensor signal short circuit to 5 volts
Refer to the electrical guides and check the right-hand sunlight sensor sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6412 Left Solar Sensor
  • Left-hand solar sensor signal short circuit to 5 volts
Refer to the electrical guides and check the left-hand sunlight sensor sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6713 Sensor Ground
  • Sensor ground circuit high resistance
Refer to the electrical guide and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6811 Ambient Temperature Sensor
  • Ambient air temperature sensor signal short circuit to ground
Refer to the electrical guide and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6815 Ambient Temperature Sensor
  • Ambient air temperature sensor signal high resistance
  • Ambient air temperature sensor signal short circuit to 5 volts
Refer to the electrical guides and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6911 Humidity Sensor
  • Humidity sensor signal short circuit to ground
Refer to the electrical guides and check the humidity/temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6915 Humidity Sensor
  • Humidity sensor signal high resistance
  • Humidity sensor signal short circuit to power
Refer to the electrical guides and check the humidity/temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A7001 Compressor Solenoid +ve Supply
  • Refrigerant solenoid valve power circuit short circuit to ground
  • Refrigerant solenoid valve power circuit short circuit to power
  • Refrigerant solenoid valve over temperature
Refer to the electrical guides and check the refrigerant solenoid circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A7111 Air Off Temperature Sensor
  • Air off temperature sensor circuit short circuit to ground
Check the air off sensor and circuit. Refer to the electrical guides.
B1A7115 Air off temperature sensor
  • Air off temperature sensor circuit short circuit to power
  • Air off temperature sensor circuit high resistance
Check the air off sensor and circuit. Refer to the electrical guides.
B1A7318 Left Hand Seat Heater
  • Left-hand seat heater power supply high resistance
  • Left-hand seat heater power supply short circuit to ground
Check the left-hand seat heater switch and circuit. Refer to the electrical guides.
B1A7418 Right Hand Seat Heater
  • Right-hand seat heater power supply current below threshold
Check the right-hand seat heater switch and circuit. Refer to the electrical guides.
B1A9815 LIN Bus Circuit #1
  • LIN bus high resistance
  • LIN bus short circuit to power
Check the LIN circuits. Refer to the electrical guides.
B1B6013 Feedback Potentiometer Circuit
  • Air intake stuck in one position
  • Feedback potentiometer circuit high resistance
Check the feedback potentiometer/air temperature mode motor circuits. Refer to the electrical guides.
B1B6111 Pollution Sensor HC Input Circuit
  • Pollution sensor HC/CO signal short circuit to ground
Check the pollution sensor circuit. Refer to the electrical guides. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B6211 Pollution Sensor - NOx
  • Pollution sensor Nox signal short circuit to ground
Check the pollution sensor NOx circuit. Refer to the electrical guides. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B6313 Feedback Potentiometer Ground Circuit
  • Sensor ground high resistance
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B6511 Left Hand Seat Heater Temperature Sensor
  • Left-hand seat heater temperature signal short circuit to ground
Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B6515 Left Hand Seat Heater Temperature Sensor
  • Left-hand seat heater temperature signal high resistance
  • Left-hand seat heater temperature signal short circuit to power
Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B6611 Right Hand Seat Heater Temperature Sensor
  • Right-hand seat heater temperature signal short circuit to ground
Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B6615 Right Hand Seat Heater Temperature Sensor
  • Right-hand seat heater temperature signal high resistance
  • Right-hand seat heater temperature signal short circuit to power
  • Right-hand seat heater power supply high resistance
  • Right-hand seat heater power supply short circuit to ground
Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B6711 Air Intake Servo Potentiometer Circuit
  • Recirculation motor signal short circuit to ground
Check the intake air motor circuit. Refer to the electrical guides. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B6715 Air Intake Servo Potentiometer Circuit
  • Recirculation motor signal high resistance
  • Recirculation motor signal short circuit to power
Check the intake air motor circuit. Refer to the electrical guides. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B6801 Air Intake Servo Motor
  • Recirculation motor fault
Check the intake air motor circuit. Refer to the electrical guides. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B7015 LIN Bus Circuit
  • Rear control panel non functional
  • LIN bus high resistance
  • LIN bus short circuit to power
Check the LIN circuits. Refer to the electrical guides.
B1B7088 LIN Bus Circuit
  • LIN bus high resistance
  • LIN bus short circuit to ground
  • Pollution sensor supply short circuit to power
  • Rear air conditioning control panel ground high resistance
  • Rear air conditioning control panel ground short circuit to power
Check the LIN circuits. Refer to the electrical guides.
B1B7111 Evaporator Temperature Sensor
  • Evaporator temperature sensor circuit short circuit to ground
Check the evaporator temperature sensor circuit. Refer to the electrical guides. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B7115 Evaporator Temperature Sensor
  • Evaporator temperature sensor circuit short circuit to power
  • Evaporator temperature sensor circuit high resistance
Check the evaporator temperature sensor circuit. Refer to the electrical guides. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B7211 LIN Bus #1 Power Supply Circuit
  • LIN bus power supply circuit short circuit to ground
Check the LIN circuits. Refer to the electrical guides.
B1B7311 LIN Bus #2 Power Supply Circuit
  • LIN bus power supply circuit short circuit to ground
Check the LIN circuits. Refer to the electrical guides.
B1B7400 Foot/Defrost Damper Actuator
  • Actuator mechanical fault
  • Actuator overheating
  • Actuator circuit high resistance
  • Actuator circuit short circuit
  • Actuator power failure
Check for mechanical faults with the face/feet distribution motor (see visual inspection). Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B7449 Foot/Defrost Damper Actuator
  • Actuator internal fault
Check the face/feet distribution motor operation. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B7700 Front Right Air Blend Stepper Actuator
  • Actuator mechanical fault
  • Actuator overheating
  • Actuator circuit high resistance
  • Actuator circuit short circuit
  • Actuator power failure
Check for the right-hand air temperature motor mechanical faults (see visual inspection). Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B7749 Front Right Air Blend Stepper Actuator
  • Actuator internal fault
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B7884 System Pressure
  • Pressure signal below allowable range
  • Refrigerant leak
Check the air conditioning system. Refer to the relevant section of the workshop manual.
B1B7885 System Pressure
  • Pressure signal above allowable range
  • Condenser fault
  • Cooling fan fault
Check the air conditioning system and the cooling fan operation. Refer to the relevant section of the workshop manual.
U007388 Control Module Communication Bus 'A' Off
  • CAN bus connections short circuit to each other
Refer to the Network Communications section of the workshop manual.
U030055 Internal Control Module Software Incompatibility
  • CAN bus configuration failure
  • CAN bus short circuit to ground
Configure the module using the approved diagnostic system. Check the CAN circuits. Refer to the electrical guides.
U1A1449 CAN Initialization Failure
  • CAN bus initialization failure
  • CAN bus high resistance
Configure the module using the approved diagnostic system. Check the CAN circuits. Refer to the electrical guides.