Climate Control Issue

[McCann87]

Currently it only blows out hot air, even when i have it set to lo or with the air con on, any ideas?

 

[LEE69]

Flap motor broke? have a search was discussed recently

 

[McCann87]

sounds like could be that then as all the vents still work (i.e. i can hear them open and close when selecting them) is it easy to replace?

 

[Donny9835]

there is a way to do a diagnostic check on the Air con system.

Accessing On-Board Diagnostic codes

Press and hold the recirculation button. Then press the manual flow control up arrow. You should see a 1c. Press the temperature up ("+") or down ("-") buttons to select a code number. Then press the recirculation button again. The value should display. Press the temperature up or down button again to display another code.

NOTE: Air Flow Motor (V 71) and Potentiometer (G 113) are not installed in USA/Canada vehicles. Disregard values displayed for these components.

Code Displayed Value
1 System malfunction - displayed as a Diagnostic Trouble Code (DTC)
2 Digital value of Interior Temperature Sensor, in Headliner (G 86)
3 Digital value of Interior Temperature Sensor, in Instrument Panel (G 56)
4 Digital value of Fresh Air Intake Duct Temperature Sensor (G 89)
5 Digital value of Outside Air (Ambient) Temperature Sensor (G 17), front
6 Digital value of Outside Air (Ambient) Temperature Sensor
7 Digital value of Ambient Temperature Sensor At Fresh Air Blower (G 109)
8 Digital value of Temperature Regulator Flap Motor Potentiometer (G 92)
9 Delta value of Temperature Regulator Flap
10 Non-corrected specified value of Temperature Regulator Flap
11 Digital value of Central Flap Motor Potentiometer (G 112)
12 Specified value of Central Flap
13 Digital value of Footwell/Defroster Flap Motor Potentiometer (G 114)
14 Specified value of Footwell/Defroster Flap
15 Digital value of Air Flow Flap Motor Potentiometer (G 113)
16 Specified value of Air Flow Flap
17 Vehicle Speed (km/h)
18 Actual Air Blower voltage (Volts)
19 Specified Fresh Air Blower voltage (Volts)
20 A/C Compressor (A/C Clutch) voltage (Volts)
21 Number of low voltage occurrences, non-transient
22 Cycle condition of A/C Refrigerant High Pressure Switch (F 118)
23 Cyclings of the A/C Refrigerant High Pressure Switch (F 118)
24 Cyclings of the switches, absolute non-fluctuating
25 Analog/Digital value, Kick-Down Switch
26 Analog/Digital value, Engine Coolant Temperature (ECT) Warning Light
27 Coding value
28 Engine Speed (RPM)
29 A/C Compressor speed in rpm (Equals Engine Speed x 1.28)
30 Software version
31 Display check (all segments of A/C Control Head display light up)
32 Potentiometer malfunction counter, Temperature Regulator Flap
33 Potentiometer malfunction counter, Central Flap
34 Potentiometer malfunction counter, Footwell/Defroster Flap
35 Potentiometer malfunction counter, Air Flow Map
36 Feedback value, cold end-stop, Temperature Regulator Flap Motor Potentiometer (G 92)
37 Feedback value, hot end-stop, Temperature Regulator Flap Motor Potentiometer (G 92), max. stop
38 Feedback value, cold end-stop, Central Flap Motor Potentiometer (G 112)
39 Feedback value, hot end-stop, Central Flap Motor Potentiometer (G 112)
40 Feedback value, cold end-stop, Footwell/Defroster Flap Motor Potentiometer (G114)
41 Feedback value, hot end-stop, Footwell/Defroster Flap Motor Potentiometer (G114)
42 Feedback value, cold end-stop, Air Flow Map Motor Potentiometer (G 113)
43 Feedback value, hot end-stop, Air Flow Map Motor Potentiometer (G 113)
44 Vehicle operation cycle counter
45 Calculated interior temperature (internal software, in digits)
46 Outside (ambient) temperature, filtered, for regulation (internal software)
47 Outside (ambient) temperature, unfiltered, (internal software, in deg C)
48 Outside (ambient) temperature, unfiltered, (in digits)
49 Malfunction counter for speedometer (vehicle speed) signal
50 Standing time (in minutes)
51 Engine Coolant Temperature (ECT) in deg C
52 Graphics channel 1 - A/C compressor switch-off conditions are identified by illuminated segments of the "88.8" display.
53 Graphics channel 2 - Climate system electrical outputs are identified by illuminated segments of the "88.8" display.
54 Control characteristics
55 Outside (ambient) temperature, in deg C or deg F depending on setting on A/C control head
56 Temperature in deg C, from Interior Temperature Sensor, in Headliner (G 86)
57 Temperature in deg C, from Interior Temperature Sensor, in Instrument Panel (G 56)
58 Temperature in deg C, from Fresh Air Intake Duct Temperature Sensor (G 89)
59 Temperature in deg C, from Outside Air (Ambient) Temperature Sensor (G 17), front
60 Temperature in deg C, from Ambient Temperature Sensor At Fresh Air Blower (G 109)
61 Software version (latest)




Diagnostic Trouble Code Meanings



Diagnostic Trouble

Code (Sensor)


Malfunction Description

00.0


No malfunction present

02.1 (G86)


Interior Temperature Sensor, in Headliner, static open, *02.1

02.2


Interior Temperature Sensor, in Headliner, static short, see 02.1

02.3


Interior Temperature Sensor, in Headliner, sporadic open

02.4


Interior Temperature Sensor, in Headliner, sporadic short

03.1 (G56)


Interior Temperature Sensor, in Instrument Panel, static open, see 02.1

03.2


Interior Temperature Sensor, in Instrument Panel, static short, see 02.1

03.3


Interior Temperature Sensor, in Instrument Panel, sporadic open

03.4


Interior Temperature Sensor, in Instrument Panel, sporadic short

04.1 (G89)


Fresh Air Intake Duct Temperature Sensor, static open, *04.1

04.2


Fresh Air Intake Duct Temperature Sensor, static short, see 04.1

04.3


Fresh Air Intake Duct Temperature Sensor, sporadic open

04.4


Fresh Air Intake Duct Temperature Sensor, sporadic short

05.1 (G17)


Outside Air (Ambient) Temperature Sensor, front, static open, *05.1

05.2


Outside Air (Ambient) Temperature Sensor, front, static short, see 05.1, *05.2

05.3


Outside Air (Ambient) Temperature Sensor, front, sporadic open

05.4


Outside Air (Ambient) Temperature Sensor, front, sporadic short

06.1 (G110)


Engine Coolant Temperature (ECT), A/C static open, *06.1

06.2


Engine Coolant Temperature (ECT), A/C static short, see 06.1

06.3


Engine Coolant Temperature (ECT), A/C sporadic open

06.4


Engine Coolant Temperature (ECT), A/C sporadic short

07.1 (G109)


Ambient Temperature Sensor at Fresh Air Blower, static open, *07.1

07.2


Ambient Temperature Sensor at Fresh Air Blower, static short, see 07.1

07.3


Ambient Temperature Sensor at Fresh Air Blower, sporadic open

07.4


Ambient Temperature Sensor at Fresh Air Blower, sporadic short

08.1 (G92)


Temperature Regulator Flap Motor Potentiometer, static open, *08.1

08.2


Temperature Regulator Flap Motor Potentiometer, static short, see 08.1

08.3


Temperature Regulator Flap Motor Potentiometer, sporadic open

08.4


Temperature Regulator Flap Motor Potentiometer, sporadic short

08.5


Temperature Regulator Flap, static block, *08.5

08.6


Temperature Regulator Flap Motor Potentiometer, malfunction

08.7


Temperature Regulator Flap, sporadic block

11.1 (G112)


Central Flap Motor Potentiometer, static open, *11.1

11.2


Central Flap Motor Potentiometer, static short, see 11.1

11.3


Central Flap Motor Potentiometer, sporadic open

11.4


Central Flap Motor Potentiometer, sporadic short

11.5


Central Flap, static block, *11.5

11.6


Central Flap Motor Potentiometer, malfunction

11.7


Central Flap, sporadic block

13.1 (G114)


Footwell/Defroster Flap Motor Potentiometer, static open, *13.1

13.2


Footwell/Defroster Flap Motor Potentiometer, static short, see 13.1

13.3


Footwell/Defroster Flap Motor Potentiometer, sporadic open

13.4


Footwell/Defroster Flap Motor Potentiometer, sporadic short

13.5


Footwell/Defroster Flap, static block, *13.5

13.6


Footwell/Defroster Flap Motor Potentiometer, malfunction

13.7


Footwell/Defroster Flap, sporadic block

15.1 (G113)


Air Flow Flap Motor Potentiometer, static open, *15.1

15.2


Air Flow Flap Motor Potentiometer, static short, see 15.1

15.3


Air Flow Flap Motor Potentiometer, sporadic open

15.4


Air Flow Flap Motor Potentiometer, sporadic short

15.5


Air Flow Flap, static block, see *15.5

15.6


Air Flow Flap Motor Potentiometer, malfunction

15.7


Air Flow Flap, sporadic block

17.0


Vehicle Speed Signal faulty

18.1


Fresh air blower voltage, static

18.3


Fresh air blower voltage, sporadic

20.1


A/C compressor voltage not OK - static, *20.1

20.3


A/C compressor voltage not OK - sporadic

22.1 (F118)


A/C Refrigerant High Pressure Switch, static open, *22.1

22.3


A/C Refrigerant High Pressure Switch, sporadic open

22.5


A/C Refrigerant High Pressure Switch, 120X open, *22.5

29.1


Belt slip detection "soft", static

29.2


Belt slip detection "hard", static

29.3


Belt slip detection "soft", sporadic

29.4


Belt slip detection "hard", sporadic



Diagnostic Trouble Code Notes:

*02.1


Digital default value of 128 is programmed if sensor fails

*04.1


Value supplied by Temp. Sensor is used if sensor fails

*05.1


Value supplied by Temp. Sensor is used if sensor fails

*05.2


Digital default value of 128 is programmed if sensors G89 & G17 both fail

*06.1


Engine Coolant Temperature is calculated is sensor should fail or is not installed; diagnosis occurs only above 0 degrees Celsius

*07.1


Programmed corrective value = 0

*08.1


Temperature Regulator Flap Motor will no longer be controlled automatically; manual adjustment only

*08.5


Motor is cycled; software attempts to eliminate block

*11.1


Central Flap Motor will no longer be controlled automatically; manual adjustment only

*11.5


Motor is cycled; software attempts to eliminate block

*13.1


Footwell/Defroster Flap Motor will no longer be controlled automatically; manual adjustment only

*13.5


Motor is cycled; software attempts to eliminate block

*15.1


Digital value is internally programmed for limp-home mode

*15.5


Motor is cycled; software attempts to eliminate block

*20.1


Compressor remains off until voltage is greater than 10.8V for at least 25 seconds

*22.1


Compressor remains off until switch closes

*22.5


Compressor re-engagement circuit, VAG 1551 Scan Tool function