most of these climate controls work by opening and closing different air doors. There are electric modules that move them.It may just be stunk or there maybe something stopping the heater door from opening, like leaves. Or it could even be a blown fuse.

 

forget to add that it could be the servo amplifier, thats what make the door servo move.

 

It is very important to positively identify the area of concern before starting a rectification procedure. A little time spent with your customer to identify the conditions under which a problem occurs will be beneficial. See below for example:

No defrost document.write(languageText("posssources")); Possible Source(s): [*]No airflow to windshield
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Check blowers and flaps [/ul] document.write(languageText("posssources")); Possible Source(s): [*]No function in defrost mode
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Check A/CCM [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Mode selection not available
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Check control panel communication [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Airflow OK but no heat
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Check water pump and valve [/ul]Relevant criteria are: Weather conditions, ambient temperature, intermittent or continuous fault, airflow fault, temperature control fault, distribution fault and air inlet problem.

Functional Check newStep(0); This simple 'first line check' will allow you to ascertain whether the system is operating within its design parameters, without recourse to PDU.

stepNum(0); 1 . With the engine at normal running temperature.

stepNum(0); 2 . Presss AUTO to display selected temperature and illuminate AUTO and A/C state lamps.

stepNum(0); 3 . Rotate FAN to increase or decrease lower speed, verify bar graph representation.

stepNum(0); 4 . Select A/C to toggle on or off. (The compressor may be inhibited by the ECM should either the engine temperature NOT be normal or the ambient be < 2° C).

stepNum(0); 5 . Select RECIRC , state lamp should be lit and the recirculation flaps open.

stepNum(0); 6 . Select distribution buttons in turn, verify correct air distribution and relevant state lamp.

stepNum(0); 7 . Select DEFROST , check max fans and air to the windshield.

stepNum(0); 8 . Cycle TEMPERATURE to ' HI ' and ' LO ' to verify demanded variations and display operation. Note that extremes will provide max heat or cold independent of in-car temperature.

stepNum(0); 9 . Select EXT to toggle between ambient and control temperatures.

stepNum(0); 10 . Select F (where fitted) and R - noting exterior mirror; verify timer and operation (glass may be warm to the touch)

stepNum(0); 11 . Initiate system 'Self Test' to display stored faults should any of the above not perform as stated.

System Symptoms newStep(0); There are five basic symptoms associated with air conditioning fault diagnosis.

The following conditions are not in order of priority.

Symptom #1 newStep(0); No cooling document.write(languageText("posssources")); Possible Source(s): [*]Compressor seized [*]Compressor seal failure [*]Compressor valve or piston damage
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Renew compressor [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Compressor clutch / circuit faulty
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Refer to PDU [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Drive belt slack / broken
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Adjust or renew [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Blower motor / circuit faulty [*]Pressure switch / circuit fault
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Refer to PDU [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Total loss of refrigerant caused by broken pipe or joint
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Repair / renew. Check code 23 [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Partial loss of refrigerant caused by leaking joint or pipe
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Repair / renew, check fault code #23 [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Condenser damage
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Renew, check fault code #23 [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Blocked receiver / drier filter
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Renew receiver / drier [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Evaporator sensor / circuit faulty
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Refer to PDU, check fault code #13 [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Blocked pollen filter (if fitted)
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Clean or renew [/ul] Symptom #2 newStep(0); Insufficient cooling document.write(languageText("posssources")); Possible Source(s): [*]Compressor clutch slipping
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Renew clutch assembly [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Flaps or vents closed / seized
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Check fault codes #41 to 46 [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Blower circuit fault
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Refer to PDU [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Blocked condenser matrix / fins
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Check high / low side pressures / renew. Check / clean fins [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Blocked evaporator matrix
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Check high / low side pressures / renew [/ul] document.write(languageText("posssources")); Possible Source(s): [*]Blocked pollen filter (if fitted)
[b] document.write(languageText("actionstake"));

 

Control Components
newStep(0); Connector Pin Identity Chart for AC001 newStep(0);

Pin Number Circuit Circuit Function 001
Compressor ON signal 002
Coolant valve 003
RH Blower motor relay 004
Heated windshield relays (where fitted) 005
Heated door mirror relay 006
Defrost servomotor (positive) 007
Center vent servomotor (positive) 008
LH air intake servomotor fresh / recirculation (positive) 009
RH air intake servomotor fresh / recirculation (positive) 010
Not used 011
Not used 012
Foot servomotor (positive) 013
Cool air bypass servomotor (positive) 014
Not used 015
Not used 016
LH Blower motor relay 017
Coolant pump motor relay 018
Heated backlight relay 019
Defrost servomotor (negative) 020
Center vent servomotor (negative) 021
LH air intake servomotor fresh / recirculation (negative) 022
RH air intake servomotor fresh / recirculation (negative) 023
Not used 024
Not used 025
Foot servomotor (negative) 026
Cool air bypass servomotor (negative)
Connector Pin Identity Chart for AC002 newStep(0);

Pin Number Circuit Circuit Function 001
Solar sensor 002
Center vent servomotor feedback potentiometer 003
RH air intake servomotor feedback potentiometer fresh / recirculation 004
Not used 005
Cool air bypass servomotor feedback potentiometer 006
Coolant temperature signal 007
RH blower motor voltage feedback 008
RH blower motor drive signal 009
Not used 010
Defrost servomotor feedback potentiometer 011
LH air intake servomotor feedback potentiometer fresh / recirculation 012
Not used 013
Foot servomotor feedback potentiometer 014
Not used 015
LH blower motor voltage feedback 016
LH blower motor drive signal
Connector Pin Identity Chart for AC003 newStep(0);

Pin Number Circuit Circuit Function 001
Screen request to ECM 002
CLOCK signal to control panel 003
DATA OUT signal to control panel 004
Compressor lock signal 005
Exterior air temperature sensor 006
Heater matrix temperature sensor 007
DATA IN signal from control panel 008
START signal to control panel 009
Not used 010
Compressor lock select 011
In-car temperature sensor 012
Evaporator temperature sensor
Connector Pin Identity Chart for AC004 newStep(0);

Pin Number Circuit Circuit Function 001
Ignition positive supply 002
Battery isolate supply 003
Auxiliary ground 004
Auxiliary ground to control panel 005
Battery supply 006
Engine speed input 007
Electrical load drive inhibit 008
+5V sensors 009
Clutch request to ECM 010
Diagnostic L-line 011
Not used 012
Ignition (positive) to control panel 013
System ground 014
Ground to control panel 015
Air conditioning isolation relay 016
Vehicle speed 017
Pressure switch 018
Aspirator motor (In-car sensor) 019
Sensor ground 020
Logic ground for diagnostic lines 021
Diagnostic K-line 022
Not used
Connector Pin Identity Chart for FC043 newStep(0);

Pin Number Circuit Circuit Function 1
Input CLOCK 2
Input START 3
Input DATA IN 4
Output DATA OUT 5
Input ignition (positive) 6
Input auxiliary (negative) 7
Ground 8
Dimmer 9
Dimmer override 10
Not used 11
Not used 12
Not used
Control Panel Communication newStep(0); The control panel provides operator interface with the climate control system.

Control panel operation is described in detail in the D section.

Control Panel Inputs (I/P) / Outputs (O/P) newStep(0); Pin # Description Cable color 1 O/P clock Slate 2 O/P start Slate / Red 3 I/P data Slate / Yellow 4 O/P data Slate / Green 5 O/P ignition +ve White / Red 6 O/P auxiliary +ve White / Blue 7 O/P ground Black 8 Dimmer Red 9 Dimmer override Red / Green 10 Not used n/a 11 Not used n/a 12 Not used n/a
System Self-test newStep(0); Control Panel Interrogation Procedure newStep(0); The control panel has a self-diagnosis feature, and is capable of displaying and clearing stored fault codes.

Climate control is an integrated system, therefore it is recommended that the PDU is used for fault diagnosis. The fault codes displayed with the control panel self-diagnosis feature are not as comprehensive as those of the PDU. The PDU will display the relevant fault code, fault code description and information of the system peripherals at the time the fault occurred.

Fault Code Extraction and Deletion Procedure newStep(0); Error information is stored in the A/CCM up to a maximum of 5 faults. Should a sensor fault occur there will be an audible beep and the message Er will be displayed on the control panel display for 5 seconds after ignition on. Please note that this will happen only once in any ignition switch cycle. The error source may be accessed by the following procedure

This procedure must be completed through one complete cycle, 1 through 6

Step Result #1 Simultaneously hold AUTO and RECIRC - Switch ignition to ON Display element check #2 Press AUTO Display of stored fault (NUMERIC) code. If ZERO appears, there are no stored codes #3 Press FACE Scroll through stored faults (maximum of 5) #4 Simultaneously press FACE and R Clear stored fault codes (may need to be repeated for each fault) #5 Press RECIRC (Press FAN to skip actuator check) Initiate actuator check (Actuator codes 20 through 27 * ) #6 Press FAN Exit error check mode
document.write(languageText("note")); NOTE:
* Actuator codes do NOT equate to system fault codes.
document.write(languageText("note")); NOTE:
Only codes 11, 15 and 21 (see Fault Code Listing) will cause audible beep and 'Er' display.
document.write(languageText("note")); NOTE:
If '0' is displayed, there are no stored fault codes, wait 30 seconds to allow system self-test.
[ul][*]The control panel display will flash repeatedly indicating a list of two digit numbers (see table for code analysis).[*]Should a code be displayed accompanied by an audible beep, the fault is current and therefore still present within the system. A code displayed without an accompanying 'beep' indicates a fault had previously occurred but is not present within the system. [/ul] document.write(languageText("note")); NOTE:
It is advisable to check all areas indicated with cleared fault codes. Such faults may re-occur if intermittent problems are present in the system.
[ul][*]To delete stored and cleared fault codes press 'R' and 'FACE' buttons simultaneously.[*]After investigating and correcting all stored faults, press the 'Push Off' button to restore normal operation with default panel settings, ie AUTO at 24°C. [/ul] System Self-test newStep(0); 0 Normal operation no fault codes present document.write(languageText("posssources")); Possible Source(s): [*]None
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Wait 30 seconds for system self-check. [/ul] 11 Motorized in-car aspirator malfunction document.write(languageText("posssources")); Possible Source(s): [*]Harness / connector fault [*]Sensor open / short circuit
document.write(languageText("actionstake")); Action(s) to take:
[ul][*]Panel fault codes are not stored for motorized in-car aspirator motor failure. [/ul] [color="green"]12 Ambient tempe