Monday, April 22, 2013

X300 Air Conditioning Self Test and Diagnostics


A VIDEO OF USING TEST MODE

To check for error codes in the Climate Control System with the internal diagnostics via the ‘Panel
Codes’

1. Ignition off - hold down AUTO and RECIRCULATION buttons and
switch on the ignition

2. press AUTO button - if ZERO shows, there's no stored
error codes

3. Press the RECIRCULATED AIR button to start diagnostic, sequence will start to test system.

4. press FACE button repeatedly to scroll through stored
fault codes

5. press FACE and HEATED REAR WINDOW buttons together to
clear a fault code.

6. repeat step 4 if there's more than one code

7. press FAN button to exit Interrogation Procedure
.


Control Panel Fault Code Listing
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. 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 None Wait 30 seconds for system self-check.

11 Motorized in-car aspirator malfunction Harness / connector fault Sensor open / short circuit
Panel fault codes are not stored for motorized in-car aspirator motor failure.

12 Ambient temperature sensor malfunction Harness / connector fault Sensor open / short circuit
After rectification, disconnect the vehicle battery for 10 seconds to reset the system.

13 Evaporator temperature sensor malfunction Harness / connector fault Sensor open / short
circuit Refer to PDU

14 Water temperature input malfunction Instrument cluster output Refer to PDU

15 Heater matrix temperature sensor malfunction Harness / connector fault Sensor open / short
circuit Refer to PDU

21 Solar sensor Sensor open /short circuit Refer to PDU

22 Compressor lock signal fault Low refrigerant charge, low compressor oil level, loose drive belt
Harness / connector fault Adjust items as required

23 Refrigerant pressure switch malfunction Harness / connector fault Switch open / short circuit
Refer to PDU23 Refrigerant pressure low refrigerant charge *Leak from damaged pipe or joint
Rectify as required and recharge system

24 Face vent demand potentiometer fault Potentiometer open / short circuit Harness / connector
fault Refer to PDU

31 LH fresh / recirc. potentiometer fault Harness / connector fault In certain circumstances the
servo motor may over-travel and cause further logged faults. This may be cured, following fault
rectification, by cycling the ignition ON-OFF-ON 3 times Refer to PDU

32 RH fresh / recirc. potentiometer fault Harness / connector fault In certain circumstances the
servo motor may over-travel and cause further logged faults. This may be cured, following fault
rectification, by cycling the ignition ON-OFF-ON 3 times Refer to PDU

33 Cool air by-pass potentiometer fault Harness / connector fault In certain circumstances the
servo motor may over-travel and cause further logged faults. This may be cured, following fault
rectification, by cycling the ignition ON-OFF-ON 3 times Refer to PDU

34 Defrost vent potentiometer fault Harness / connector fault In certain circumstances the servo
motor may over-travel and cause further logged faults. This may be cured, following fault
rectification, by cycling the ignition ON-OFF-ON 3 times Refer to PDU

35 Centre vent potentiometer fault Harness / connector fault In certain circumstances the servo
motor may over-travel and cause further logged faults. This may be cured, following fault
rectification, by cycling the ignition ON-OFF-ON 3 times Refer to PDU

36 Foot vent potentiometer fault Harness / connector fault In certain circumstances the servo
motor may over-travel and cause further logged faults. This may be cured, following fault
rectification, by cycling the ignition ON-OFF-ON 3 times Refer to PDU

41 LH fresh / recirc. motor fault Harness / connector fault Servo motor seized or sticking Flap
seized or sticking Refer to PDU

42 RH fresh / recirc. motor fault Harness / connector fault Servo motor seized or sticking Flap
seized or sticking Refer to PDU

43 Cool air by-pass motor fault Harness / connector fault Servo motor seized or sticking Flap
seized or sticking Refer to PDU

43 Cool Air by-pass motor fault Harness / connector fault Servo motor seized or sticking Flap
seized or sticking Refer to PDU

44 Defrost vent motor fault Harness / connector fault Servo motor seized or sticking Flap seized
or sticking Refer to PDU

45 Centre vent motor fault Harness / connector fault Servo motor seized or sticking Flap seized or
sticking Refer to PDU

46 Foot vent motor fault Harness / connector fault Servo motor seized or sticking Flap seized or
sticking Refer to PDU

PDU DTC codes: not generally accessible with a generic OBDII code reader but linked
to the above may provide additional ‘Possible Causes’














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