SPECIFICATIONS
| Type | Description |
|---|---|
| Automatic Temperature Control (ATC) heating, ventilation and air conditioning unit | Dual zone with side to side temperature control |
| Compressor | Clutchless, belt driven from engine with electronically controlled outputs. |
GENERAL SPECIFICATION
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 service information.
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 service information.
INSPECTION AND VERIFICATION
- Verify the customer concern.
- Visually inspect for obvious mechanical or electrical faults. Visual Inspection 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.
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 service information. |
DTC INDEX
Note. 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 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 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 service information. |
| 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 service information. |
| 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 service information. |
| 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 service information. |
| 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 service information. |
| 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 service information. |
| U007388 | Control Module Communication Bus 'A' Off | CAN bus connections short circuit to each other | Refer to the Network Communications service information. |
| 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. |
AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING
| WARNING | Servicing must be carried out by personnel familiar with both vehicle system and the charging and testing equipment. All operations must be carried out in a well ventilated area away from open flame and heat sources. |
Note. The receiver drier need only be changed under the following circumstances: There is dirt in the refrigerant circuit (eg. compressor seizure); the system is leaking and refrigerant has been lost to atmosphere; refrigerant circuit has been open more than 24 hours due to repair.
Scheme 1
- Refrigerant recovery: Remove the dust covers from the high and low pressure connections.
- Connect the high and low pressure lines to the appropriate connections.
- Open the valves on the connections.
- Turn the valves on the station to the correct positions.
- Turn the process switch to the correct position.
- Turn the main switch to 'ON'.
- Allow the system to recover the refrigerant from the system.
- Close the valves on the refrigerant station.
- Turn the main switch 'OFF'.
- Close the valves on the connections.
- Disconnect the high and low pressure connections.
- Install the dust covers to the connectors.
- Open the tap at the rear of the station to drain the refrigerant oil.
- Measure and record the quantity of refrigerant oil recovered from the system.
- Close the tap at the rear of the station.
- Evacuation: Remove the dust covers from the high and low pressure connections.
- Connect the high and low pressure lines to the appropriate connections.
- Open the valves on the connections.
- Turn the valves on the station to the correct positions.
- Turn the process switch to the correct position.
- Turn the main switch to 'ON'.
- Allow the station to evacuate the A/C system.
- Recharging: Close the valves on the refrigerant station.
- Close the valve on the oil charger.
- Disconnect the yellow line from the refrigerant station.
- Remove the cover from the oil charger.
- Pour the correct quantity of refrigerant oil into the oil charger.
- Install the cover to the oil charger.
- Connect the yellow line to the refrigerant station.
- Open the valve on the oil charger.
- Move the pointer on the refrigerant gauge to mark the position of the refrigerant drop.
- Slowly open the correct valve on the refrigerant to allow the vacuum to pull the refrigerant into the system.
- Close the valve on the refrigerant station when the correct amount of refrigerant has been drawn into the air conditioning system.
- Turn the main switch 'OFF'.
- Close the valves on the connections.
- Disconnect the high and low pressure connections.