Went to use the Air Con in my 2003 1.4 16v saloon last week and found it would only output a minimal amount of chilled-air and only when the dashboard control was set to footwell output.

Did a VAG.Com scan which revealed some pre-existing faults (Highlighted orange) but some new ones (highlighted red). Also noted that some of the pre-existing faults had changed in comparison with an earlier scan (Nov 2008), see below, as had the coding highlighted in blue:-

22:26 03/07/2009Thursday,02,July,2009,09:19:51:08693

VCDS Version: Release 805.4

Data version: 20090602

Nick

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

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

Chassis Type: 6Y - Skoda Fabia I

Scan: 01 02 03 08 09 15 17 19 25 37 44 46 55 56 76

VIN: Mileage: 66350km/41227miles

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

Address 01: Engine Labels: 036-906-034-APE.lbl

Part No: 036 906 034 DF

Component: MARELLI 4MV 5020

Coding: 00031

Shop #: WSC 00000

SKZ7Z0B1485705

1 Fault Found:

18020 - Engine Control Module Incorrectly Coded

P1612 - 35-00 - -

Readiness: 0000 0000

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

Address 03: ABS Brakes Labels: 6Q0-907-37x-ASR.lbl

Part No: 6Q0 907 379 H

Component: ABS/ASR 5.7 FRONT V20

Coding: 00124

Shop #: WSC 13765

No fault code found.

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

Address 08: Auto HVAC Labels: 6Q0-820-045.lbl

Part No: 6Y0 820 045

Component: Klimaanlage X0830

3 Faults Found:

01596 - Motor for Outside/Recirculated Air Flap (V154)

30-10 - Open or Short to Plus - Intermittent

01596 - Motor for Outside/Recirculated Air Flap (V154)

41-10 - Blocked or No Voltage - Intermittent

01596 - Motor for Outside/Recirculated Air Flap (V154)

29-10 - Short to Ground - Intermittent-------------------------------------------------------------------------------

Address 09: Cent. Elect. Labels: 6Qx-937-049-C.lbl

Part No: 6Q1 937 049 C

Component: 00 BN-SG. 1S33

Coding: 17418

Shop #: WSC 25040

1 Fault Found:

01054 - Power Supply Relay; Terminal 30 (J317)

28-00 - Short to Plus

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

Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl

Part No: 1C0 909 601 C

Component: 02 AIRBAG VW51 0004

Coding: 12338

Shop #: WSC 13765

No fault code found.

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

Address 17: Instruments Labels: Redir Fail!

Part No: 6Y2 919 880 B

Component: KOMBIINSTRUMENT VDO V12

Coding: 16442

Shop #: WSC 25021

SKZ7Z0B1485705

No fault code found.

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

Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl

Part No: 6N0 909 901

Component: 33 GATEWAY CAN 1S33

Coding: 00014

Shop #: WSC 13765

No fault code found.

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

Address 44: Steering Assist Labels: 6Q0-423-156.lbl

Part No: 6Q0 423 156 M

Component: LenkhilfeTRW V210

Coding: 00140

Shop #: WSC 13765

No fault code found.

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

Address 46: Central Conv. Labels: 6Q0-959-433.lbl

Part No: 6Q0 959 433 E

Component: 31 Komfortgerát 0001

Coding: 00067

Shop #: WSC 13765

Part No: 6Q2959802

Component: 31 Tõrsteuer.FS TFK 0002

Part No: 6Q2959801

Component: 31 Tõrsteuer.BF TFK 0002

No fault code found.

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

VCDS Version: Release 805.1

Data version: 20081017

Nick

Friday,21,November,2008,20:36:31:08693

Chassis Type: 6Y - Skoda Fabia I

Scan: 01 02 03 08 09 15 17 19 25 37 44 46 55 56 76

VIN ******************** Mileage: 62130km/38605miles

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

Address 01: Engine Labels: 036-906-034-APE.lbl

Part No: 036 906 034 DF

Component: MARELLI 4MV 4842

Coding: 00071 Shop #: WSC 25040

***********************

No fault code found.

Readiness: 1110 0101

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

Address 03: ABS Brakes Labels: 6Q0-907-37x-ASR.lbl

Part No: 6Q0 907 379 H

Component: ABS/ASR 5.7 FRONT V20

Coding: 00124

Shop #: WSC 13765

No fault code found.

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

Address 08: Auto HVAC Labels: 6Q0-820-045.lbl

Part No: 6Y0 820 045

Component: Klimaanlage X0830

3 Faults Found:

01596 - Motor for Outside/Recirculated Air Flap (V154)

30-10 - Open or Short to Plus - Intermittent

01596 - Motor for Outside/Recirculated Air Flap (V154)

29-10 - Short to Ground - Intermittent

01596 - Motor for Outside/Recirculated Air Flap (V154)

28-10 - Short to Plus - Intermittent

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

Address 09: Cent. Elect. Labels: 6Qx-937-049-C.lbl

Part No: 6Q1 937 049 C

Component: 00 BN-SG. 1S33

Coding: 17418

Shop #: WSC 25040

1 Fault Found:

01054 - Power Supply Relay; Terminal 30 (J317)

28-00 - Short to Plus

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

Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl

Part No: 1C0 909 601 C

Component: 02 AIRBAG VW51 0004

Coding: 12338

Shop #: WSC 13765

No fault code found.

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

Address 17: Instruments Labels: Redir Fail!

Part No: 6Y2 919 880 B

Component: KOMBIINSTRUMENT VDO V12

Coding: 16442

Shop #: WSC 25021

No fault code found.

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

Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl

Part No: 6N0 909 901

Component: 33 GATEWAY CAN 1S33

Coding: 00014

Shop #: WSC 13765

No fault code found.

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

Address 44: Steering Assist Labels: 6Q0-423-156.lbl

Part No: 6Q0 423 156 M

Component: LenkhilfeTRW V210

Coding: 00140

Shop #: WSC 13765

No fault code found.

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

Address 46: Central Conv. Labels: 6Q0-959-433.lbl

Part No: 6Q0 959 433 E

Component: 31 Komfortgerát 0001

Coding: 00067

Shop #: WSC 13765

Part No: 6Q2959802

Component: 31 Tõrsteuer.FS TFK 0002

Part No: 6Q2959801

Component: 31 Tõrsteuer.BF TFK 0002

No fault code found.

End ---------------------------------------------------------------------

Skoda, Fabia 1.4 16V 2001 Air con not working

Reference info contained in the link above, I understand the codings in the VAG COM scans highlighted blue contain data that defines the functions of the car and that the current coding of this function on my car (00031) indicates that Air Con is not available.

WITHOUT AIR CON

000?x: CAN-Datenbus Teilnehmer

+1 - ABS

+2 - Airbag

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

1+2 = 3 => 0003x

000x?: Getriebevariante

1 - 5-speed gearbox

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

00031

WITH AIR CON

000?x: CAN-Datenbus Teilnehmer

+1 - ABS

+2 - Airbag

+4 - AC

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

1+2+4 = 7 => 0007x

000x?: Getriebevariante

1 - 5-speed gearbox

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

00071

The exam question is, if there is a real problem with the air con does the ECU fault software automatically recode these items ?

Can I re-code to 00071 using VAG. COM. Are there any risks to this i.e. if there is a genuine Air Con fault ?

Car was serviced, ecu software updated, by Skoda Main dealer between Nov 2008 and July 2009. And no, I haven't upset anybody in News International.

Nick

Its possible that after an update the coding gets reset, probably the dealer who missed that during the update. Just put it back to 00071 and you're fine when it comes to the engine. The A/C faults are quite common with the Polo/Fabia/Ibiza models, nothing you can do usually except replacing the flap motor in question.

I can see that's its possible that an ECU update may reset some coding to default values, but I've had at least two previous ECU updates, one of which was provided by this main dealer, and this mis-coding was never occured before.

Anyway the car had aircon installed from new - surely the default ECU settings, as set-up on the manufacturers production line would include aircon as one of the defaults ?

If it is a genuine ****-up then it don't say much about quality control in servicing.

Of course, If I hadn't had VAG COM or a fault code reader, I would not have been aware of the erroneous code and probably would now be happily paying £60 plus VAT for a system evacuation and re-gas, £50 for a ECU diagnostic and unknown amounts of £s for a leak test.

Nice little earner for dealers during the summer holiday season in the middle of a recession !

Perhaps I will start a poll to see if anyone else has been offered an ECU update on a Fabia 1 this year - seems to me to be a bit late in the day to be offering ECU updates on this model ?

Also, the flap motor fault codes have been there since the vehicle was purchased. I even had one dealer (Not my regular one) try to sort it out and he came back, after apparently consulting Skoda UK, and said that this was normal operation - typical UK motor industry - lazy barstewards.

Nick

Edited 9 July, 200916 yr by Clunkclick

The update is out for quite a while but what I find embarrassing is that they didn't even to put the latest version on there but instead used one which was much older. Probably used an old flash CD.

For 036-906-034-DF we have seen the versions 4563, 4592, 4842, 5020 and 5954 in the wild, the latest update changes the software part number as well and the new version then is 036-997-034-BD @ 7747. This 036-997-034-BD @ 7747 is available since mid 2007.

Anyway the car had aircon installed from new - surely the default ECU settings, as set-up on the manufacturers production line would include aircon as one of the defaults ?

You would have thought so, but Skoda did put in the wrong ECU codes for some of the early Fabias when they were built, resulting in the 18020 code and the air conditioning not working.

I've just noticed that the ECU component code has changed from MARELLI 4MV 4842 in the Nov 2008 scan to MARELLI 4MV 5020 in the July 2009 scan.

Does that mean that the ECU unit has been physically changed/swapped out for another unit ?

Nick

Please see my reply above.

Why wouldn't a main SKODA UK dealer use the latest version ?

Nick

Please see my reply above.

Quote: "Probably used an old flash CD." - Means, not used the latest one.