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Aircon problem

Discuss In Car Electronics / Electrical Systems - use with caution!
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Calum_9n3
New
Posts: 5
Joined: Mon Oct 26, 2015 10:10 pm
Drives: 9n3 1.4 tdi
Location: Scotland

Aircon problem

Post by Calum_9n3 » Wed Oct 28, 2015 8:30 pm

Hi all,

I am new to the forum, and hoping someone may be able to help. I have a 2006 polo 1.4 tdi 9n3 which has developed a problem with the aircon. When I press the aircon button it lights up but nothing else seems to happen. The air blowing out through the vents when the ac is on is not cold so I know something is not right. I have regased the system as I thought it may have been low on gas which it was, but this has still not fixed the problem. I used my friends vag com and it showed there are a few faults which are listed below.

Address 01: Engine Labels: Redir Fail!
Part No: 045 906 019 CA
Component: 1,4l R3 EDC 0000SG 7537
Coding: 00002
Shop #: WSC 00788
VCID: 56A37BDBB24CBB8E57-4AE8
WVWZZZ9NZ6Y167768 VWZ7Z0D0879525

1 Fault Found:
17911 - Load Signal from Alternator Term. DF
P1503 - 35-10 - Implausible Signal - Intermittent
Readiness: 0 0 0 0 0

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 6R0-907-37x-ABS80.lbl
Part No SW: 6Q0 907 379 AF HW: 6Q0 907 379 AF
Component: ABS 8.0 front H04 0002
Revision: 00000000 Serial number: 00000000000000
Coding: 0002190
Shop #: WSC 00788 785 00200
VCID: 010978875B42EC3652-5140

1 Fault Found:
18265 - Load Signal
P1857 - 000 - Error Message from ECU - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 2
Fault Frequency: 10
Reset counter: 244
Mileage: 155137 km
Time Indication: 0


-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 6Q0-820-045.lbl
Part No: 6Q0 820 045
Component: Klimaanlage X0840
VCID: 6ADB3F2B16340F6EE3-5140

1 Fault Found:
00819 - High Pressure Sensor (G65)
07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 6Qx-937-049-C.lbl
Part No: 6Q1 937 049 D
Component: 00BK BN-SG. 1S34
Coding: 09358
Shop #: WSC 00788
VCID: 3C77C9732C2041DE41-5140

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 1C0 909 605 K
Component: 18 AIRBAG VW51 0P 0008
Coding: 12600
Shop #: WSC 00788
VCID: 2C57F933DC40D15ED1-5140

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 6Q0-920-xxx-17.lbl
Part No: 6Q0 920 903 D
Component: KOMBI+WEGFAHRSP VDO V02
Coding: 01432
Shop #: WSC 00000
VCID: 326BE74BFE6487AE9B-5140
WVWZZZ9NZ6Y167768 VWZ7Z0D0879525

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: 0B7L GATEWAY CAN 1S34
Coding: 00014
Shop #: WSC 00788
VCID: 70EF2D4330E8F5BEAD-5140

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 6Q0-423-156.clb
Part No: 6Q0 423 156 AB
Component: LenkhilfeTRW V270
Coding: 10110
Shop #: WSC 00000
VCID: 6FED2E3F2DD6EA46B4-5140

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 6Q0-959-433.lbl
Part No: 6Q0 959 433 H
Component: 1N Komfortgerát 0002
Coding: 00019
Shop #: WSC 00788
VCID: 408FBD8340C8253E1D-4B00

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 1K0-035-1xx-56.lbl
Part No SW: 6Q0 035 152 A HW: 6Q0 035 152 A
Component: Radio BVX 005 0004
Revision: 00005000 Serial number: VWZ1Z5E2997335
Coding: 0020200
Shop #: WSC 00788 785 00200
VCID: 285F052398B8FD7E35-5140

1 Fault Found:
01044 - Control Module Incorrectly Coded

000 - -


From browsing the forum it could be the connector off the alternator which is giving the low load signal for one of the faults but I dunno.

Anyone have any ideas?

Cheers

Calum

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alexperkins
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Posts: 14233
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

Re: Aircon problem

Post by alexperkins » Wed Oct 28, 2015 10:23 pm

Can you hear the air con clutch engage when you press he button?

The high pressure fault won't be helping. That can stop the system workinng

Calum_9n3
New
Posts: 5
Joined: Mon Oct 26, 2015 10:10 pm
Drives: 9n3 1.4 tdi
Location: Scotland

Re: Aircon problem

Post by Calum_9n3 » Thu Oct 29, 2015 11:03 am

Thanks for your quick reply Alex. No I can't hear the clutch engage when I press the button.

User avatar
alexperkins
Site Admin
Posts: 14233
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

Re: Aircon problem

Post by alexperkins » Thu Oct 29, 2015 11:10 am

That'll be why it doesnt get cold then. No clutch = no circulation

Run the output tests on the auto hvac system if you can and see if it passes

Calum_9n3
New
Posts: 5
Joined: Mon Oct 26, 2015 10:10 pm
Drives: 9n3 1.4 tdi
Location: Scotland

Re: Aircon problem

Post by Calum_9n3 » Thu Oct 29, 2015 8:34 pm

I ran measuring blocks on the HVAC system and it was showing o.o bar for refrigerant pressure, which I'm not sure why as it should have pressure in the system.


Address 08: Auto HVAC (6Q0 820 045 )

11:40:11 Group 001
14.50 V Voltage (Terminal 15)
4.20 V Fresh Air Blower (V2) Position
OFF Coolant Fan (Stage 1)
OFF Coolant Fan (Stage 2)

11:40:11 Group 002
0.0 % Compressor Load
0.0 bar Refrigerant Pressure (G65)
3.0 Comprossor Shut-Off
14.0°C Temperature (G263) Evaporator

11:40:11 Group 003
16.0°C Temperature at Floor Outlet (G192)
14.0°C Temperature at Center Outl. (G191)
14.0°C Temperature at A/C Panel (G56)
ON Heat Exchanger Deactivation

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 08: Auto HVAC (6Q0 820 045 )

11:41:42 Group 004: Motor for Outside/Recirculated Air Flap (V154) / Potentiom. (G143)
225 Potentiom. (G143) (actual)
218 Potentiom. (G143) (specified)
218 Stop/Learned (Fresh Air)
48 Stop/Learned (Recirculated)

11:41:42 Group 005: Motor for Temperature Regulator Flap (V68) / Potentiom. (G92)
21 Potentiom. (G92) (actual)
21 Potentiom. (G92) (specified)
232 Stop/Learned (Heating)
21 Stop/Learned (Cooling)

11:41:42 Group 006
850 /min Engine Speed
ON Idle Speed Increase
0.0 km/h Vehicle Speed
Reverse OFF Reverse Gear engaged

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 08: Auto HVAC (6Q0 820 045 )

11:42:21 Group 007
00:01 Standing Time
ON Status Terminal X
0.0 % Dimming (Terminal 58d)
OFF Auxiliary Heater (Z35)

11:42:21 Group 008
11.0°C Outside Air Temperature (G17)
55.0°C Coolant Temperature (G62)
OFF Coolant Temperat. "too High"
OFF Compressor Load Limitation

Calum_9n3
New
Posts: 5
Joined: Mon Oct 26, 2015 10:10 pm
Drives: 9n3 1.4 tdi
Location: Scotland

Re: Aircon problem

Post by Calum_9n3 » Thu Oct 29, 2015 8:52 pm

I ran measuring blocks on the hvac system, and it showed 0.0 bar of refrigerant pressure? The system was pressurised to the correct psi when I regased it. I will double check tomorrow what pressure it is showing.

Address 08: Auto HVAC (6Q0 820 045 )

11:40:11 Group 001
14.50 V Voltage (Terminal 15)
4.20 V Fresh Air Blower (V2) Position
OFF Coolant Fan (Stage 1)
OFF Coolant Fan (Stage 2)

11:40:11 Group 002
0.0 % Compressor Load
0.0 bar Refrigerant Pressure (G65)
3.0 Comprossor Shut-Off
14.0°C Temperature (G263) Evaporator

11:40:11 Group 003
16.0°C Temperature at Floor Outlet (G192)
14.0°C Temperature at Center Outl. (G191)
14.0°C Temperature at A/C Panel (G56)
ON Heat Exchanger Deactivation

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 08: Auto HVAC (6Q0 820 045 )

11:41:42 Group 004: Motor for Outside/Recirculated Air Flap (V154) / Potentiom. (G143)
225 Potentiom. (G143) (actual)
218 Potentiom. (G143) (specified)
218 Stop/Learned (Fresh Air)
48 Stop/Learned (Recirculated)

11:41:42 Group 005: Motor for Temperature Regulator Flap (V68) / Potentiom. (G92)
21 Potentiom. (G92) (actual)
21 Potentiom. (G92) (specified)
232 Stop/Learned (Heating)
21 Stop/Learned (Cooling)

11:41:42 Group 006
850 /min Engine Speed
ON Idle Speed Increase
0.0 km/h Vehicle Speed
Reverse OFF Reverse Gear engaged

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 08: Auto HVAC (6Q0 820 045 )

11:42:21 Group 007
00:01 Standing Time
ON Status Terminal X
0.0 % Dimming (Terminal 58d)
OFF Auxiliary Heater (Z35)

11:42:21 Group 008
11.0°C Outside Air Temperature (G17)
55.0°C Coolant Temperature (G62)
OFF Coolant Temperat. "too High"
OFF Compressor Load Limitation

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