Manufacturer Code Charts

Control Panel Fault Code Diagnosis

Condition(s):


NOTE: Reference fault code #23*: In ambient temperatures below 0° C, this code may be logged because the low ambient causes a temporary low gas pressure.


NOTE: Where the ambient temperature rises above 40° C, with the engine close to overheating, electrical feed to the compressor clutch may be cut and code #23 registered.


0. Normal operation no fault codes present
Possible Source(s):
- None

Action(s) to take:
- Wait 30 seconds for system self-check.

11. Motorized in-car aspirator malfunction
Possible Source(s):
- Harness/connector fault
- Sensor open/short circuit

Action(s) to take:
- Panel fault codes are not stored for motorized in-car aspirator motor failure.

12. Ambient temperature sensor malfunction
Possible Source(s):
- Harness/connector fault
- Sensor open/short circuit

Action(s) to take:
- After rectification, disconnect the vehicle battery for 10 seconds to reset the system.

13. Evaporator temperature sensor malfunction
Possible Source(s):
- Harness/connector fault
- Sensor open/short circuit

Action(s) to take:
- Refer to PDU

14. Water temperature input malfunction
Possible Source(s):
- Instrument cluster output

Action(s) to take:
- Refer to PDU

15. Heater matrix temperature sensor malfunction
Possible Source(s):
- Harness/connector fault
- Sensor open/short circuit

Action(s) to take:
- Refer to PDU

21. Solar sensor
Possible Source(s):
- Sensor open /short circuit

Action(s) to take:
- Refer to PDU

22. Compressor lock signal fault
Possible Source(s):
- Low refrigerant charge, low compressor oil level, loose drive belt
- Harness/connector fault

Action(s) to take:
- Adjust items as required

23. Refrigerant pressure switch malfunction
Possible Source(s):
- Harness/connector fault
- Switch open/short circuit

Action(s) to take:
- Refer to PDU

23. Refrigerant pressure low refrigerant charge
Possible Source(s):
- Leak from damaged pipe or joint

Action(s) to take:
- Rectify as required & recharge system

24. Face vent demand potentiometer fault
Possible Source(s):
- Potentiometer open / short circuit
- Harness/connector fault

Action(s) to take:
- Refer to PDU

31. LH fresh/recirc. potentiometer fault
Possible Source(s):
- Harness/connector fault
- In certain circumstances the servo motor may over-travel & cause further logged faults. This may be cured, following fault rectification, by cycling the ignition ON-OFF-ON 3 times

Action(s) to take:
- Refer to PDU

32. RH fresh/recirc. potentiometer fault
Possible Source(s):
- Harness/connector fault
- In certain circumstances the servo motor may over-travel & cause further logged faults. This may be cured, following fault rectification, by cycling the ignition ON-OFF-ON 3 times

Action(s) to take:
- Refer to PDU

33. Cool air by-pass potentiometer fault
Possible Source(s):
- Harness/connector fault
- In certain circumstances the servo motor may over-travel & cause further logged faults. This may be cured, following fault rectification, by cycling the ignition ON-OFF-ON 3 times

Action(s) to take:
- Refer to PDU

34. Defrost vent potentiometer fault
Possible Source(s):
- Harness/connector fault
- In certain circumstances the servo motor may over-travel & cause further logged faults. This may be cured, following fault rectification, by cycling the ignition ON-OFF-ON 3 times

Action(s) to take:
- Refer to PDU

35. center vent potentiometer fault
Possible Source(s):
- Harness/connector fault
- In certain circumstances the servo motor may over-travel & cause further logged faults. This may be cured, following fault rectification, by cycling the ignition ON-OFF-ON 3 times

Action(s) to take:
- Refer to PDU

36. Foot vent potentiometer fault
Possible Source(s):
- Harness/connector fault
- In certain circumstances the servo motor may over-travel & cause further logged faults. This may be cured, following fault rectification, by cycling the ignition ON-OFF-ON 3 times

Action(s) to take:
- Refer to PDU

41. LH fresh/recirc. motor fault
Possible Source(s):
- Harness/connector fault
- Servo motor seized or sticking
- Flap seized or sticking

Action(s) to take:
- Refer to PDU
42. RH fresh/recirc. motor fault
Possible Source(s):
- Harness/connector fault
- Servo motor seized or sticking
- Flap seized or sticking

Action(s) to take:
- Refer to PDU

43. Cool Air by-pass motor fault
Possible Source(s):
- Harness/connector fault
- Servo motor seized or sticking
- Flap seized or sticking

Action(s) to take:
- Refer to PDU

43. Cool Air by-pass motor fault
Possible Source(s):
- Harness/connector fault
- Servo motor seized or sticking
- Flap seized or sticking

Action(s) to take:
- Refer to PDU

44. Defrost vent motor fault
Possible Source(s):
- Harness/connector fault
- Servo motor seized or sticking
- Flap seized or sticking

Action(s) to take:
- Refer to PDU

45. center vent motor fault
Possible Source(s):
- Harness/connector fault
- Servo motor seized or sticking
- Flap seized or sticking

Action(s) to take:
- Refer to PDU

46. Foot vent motor fault
Possible Source(s):
- Harness/connector fault
- Servo motor seized or sticking
- Flap seized or sticking

Action(s) to take:
- Refer to PDU

Associated Faults
Other conditions which may exist but will NOT log fault codes:

Condition(s):

No heat
Possible Source(s):
- Airlock in system.

Action(s) to take:
- Perform Cooling System fill/bleed procedure.

Possible Source(s):
- Heater water pump inoperative
- Coolant flow valve stuck closed

Action(s) to take:
- Check operation & circuit

Possible Source(s):
- Faulty engine coolant thermostat

Action(s) to take:
- Renew as required

One vent failing to open/close
Possible Source(s):
- Broken linkage.

Action(s) to take:
- Renew as required

Poor airflow
Possible Source(s):
- Blower motors - incorrect operation

Action(s) to take:
- Check operation & circuit