:  Dec 17, 2007



Overview

Due to the different equipment available in dealers, there are no specifics as to the connection of gauge sets or charging and recovery stations. Refer to the instructions for the equipment in use in your own workshop.

For information on the description and operation of the system, refer to section 412-03 - Air Conditioning in the workshop manual.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Auxiliary drive belt condition and tension
  • Compressor condition and installation
  • Condenser condition and installation/blockage
  • Air conditioning hoses and pipes
  • Receiver/drier condition and installation
  • Cooling fan
  • Fuses
  • Harnesses
  • Electrical connector(s)
  • Relays
  • Sensors
  • 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
Poor or no cooling
  • Drive belt fault
  • Compressor fault
  • Distribution motor/flap fault
  • Refrigerant leak
  • In-vehicle temperature sensor fault
  • Refrigerant pressure sensor fault
Check the drive belt condition and tension (see visual inspection). Check the compressor operation (observe the compressor as the engine is idling with the air conditioning switched on. If the compressor runs erratically or does not run. Carry out the distribution motor self test. Refer to the relevant workshop manual section. Check for sensor DTCs. Refer to the DTC index. Check the refrigerant system using your charging station.
Noise
  • Drive belt fault
  • Compressor fault
  • Compressor pulley fouling
  • Refrigerant overcharged
Confirm the air conditioning as the source of the noise by listening for the noise with the air conditioning switched off. Refer to the relevant workshop manual section. Check the refrigerant system using your charging station.
Water entry into cabin
  • Heater matrix leak
  • Blocked evaporator drain tubes
Check for coolant loss. Pressure test the cooling system as necessary. Check and clear the evaporator drain tubes as necessary.

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 cause Action
B1A6111 Cabin Temperature Sensor
  • Ambient air temperature sensor signal short circuit to ground
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.
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 guides 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 guides 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 guides and check the pressure 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.
B1B7884 System Pressure
  • Pressure signal below allowable range
  • Refrigerant leak
Check for pressure sensor DTcs. Check the refrigerant system using a suitable charging station.
B1B7885 System Pressure
  • Pressure signal above allowable range
  • Condenser fault
  • Cooling fan fault
Check for pressure sensor DTcs. Check the condenser for damage/restriction and the cooling fan operation. Check the refrigerant system using a suitable charging station.