Greg2010

Anyone Experts out there that can help with this fault. recently my Audi A3 2.0 TDI developed an intermittent starting fault. Have had the car looked at by 3 garages , 5 Diags and 3 Auto Elec, glow plugs replaced, egr unit replaced, key changed, battery replaced but car still has fault and no one can pin point the problem. Had all the relays checked. Snap-on diags produce same report as vac-com diags.

See attached pictures for more help, first pic shows car not starting and the onboard computer not showing the mpg indicator.

Second pic shows everything ready to go and car will start fine. the problem is i have to put the key in and turn on ready to start and off again about 5 times until the car passes all startup checks before it will start.

VAC-COM diags results below :---

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Sporadic communication error 1000
03-ABS Brakes -- Status: Malfunction 0010
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: Malfunction 0010
56-Radio -- Status: Malfunction 0010
7D-Aux. Heat -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine Labels: 03G-906-016-BKD.lbl
Part No SW: 03G 906 016 G HW: 028 101 136 4
Component: R4 2,0L EDC 0000SG 5334
Revision: 12345678 Serial number: AUX7Z0C8FNM01U
Coding: 0000072
Shop #: WSC 06435 000 00000

No fault code found.
Readiness: 0 0 0 1 1

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Address 03: ABS Brakes Labels: 1K0-907-379-MK60-F.lbl
Part No: 1K0 907 379 D
Component: ESP FRONT MK60 0102
Coding: 0055942
Shop #: WSC 06435 000 00000

1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent

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Address 08: Auto HVAC Labels: 8P0-820-043.lbl
Part No SW: 8P0 820 043 HW: 8P0 820 043
Component: KlimavollautomatH11 0130
Shop #: WSC 00000 000 00000

1 Fault Found:
01592 - Air Quality Sensor (G238)
010 - Open or Short to Plus
Freeze Frame:
Fault Status: 01101010
Fault Priority: 3
Fault Frequency: 225
Reset counter: 142
Mileage: 42157 km
Time Indication: 0
Date: 2005.12.01
Time: 06:51:42

Freeze Frame:
Temperature: 7.5°C


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Address 09: Cent. Elect. Labels: 8P0-907-279-23-H.lbl
Part No SW: 8P0 907 279 A HW: 8P0 907 279 A*
Component: Bordnetz-SG 1.0 H29 0501
Revision: 00029000 Serial number: 00000000170986
Coding: 01884F00A2141000000000000000000000
Shop #: WSC 00000 000 00000

Part No: 8P2 955 119 C
Component: Wischer WWS Audi350 0180
Coding: 16711696
Shop #: WSC 00000

2 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
00526 - Brake Light Switch-F
008 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8P0-959-655-84.lbl
Part No SW: 8P0 959 655 F HW: 8P0 959 655 F
Component: Airbag 8.4ED H01 0130
Coding: 0011602
Shop #: WSC 06435 000 00000

No fault code found.

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Address 16: Steering wheel Labels: 1K0-953-549-MY8.lbl
Part No SW: 1K0 953 549 A HW: 1K0 953 549 A
Component: Lenksäulenmodul 009 0030
Coding: 0000012
Shop #: WSC 06435 000 00000

No fault code found.

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Address 17: Instruments Labels: 8P0-920-xxx-17-MY7.lbl
Part No SW: 8P0 920 980 H HW: 8P0 920 980 H
Component: KOMBIINSTR. VDO H25 0110
Revision: D07 Serial number: 2248CD07000911
Coding: 0004403
Shop #: WSC 00409 210 62006

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 1K0-907-530.lbl
Part No SW: 1K0 907 530 B HW: 1K0 907 951
Component: Gateway H08 0090
Revision: 08 Serial number: 24001038130518
Coding: 3D0F0B42070101
Shop #: WSC 06435 000 00000

1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 43
Reset counter: 182
Mileage: 160734 km
Time Indication: 0
Date: 2010.03.25
Time: 15:56:22


-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 1K0-920-xxx-25.lbl
Part No SW: 8P0 920 980 H HW: 8P0 920 980 H
Component: KOMBIINSTR. VDO H25 0110
Revision: D07 Serial number: AUX7Z0C8FNM01U
Shop #: WSC 00000 000 00000

No fault code found.

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Address 42: Door Elect, Driver Labels: 8P0-959-801-MIN1.lbl
Part No: 8P0 959 801 A
Component: Tuersteuerger. H10 0010
Coding: 0000048
Shop #: WSC 06435 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1Kx-909-14x.lbl
Part No: 1K1 909 143 L
Component: EPS_ZFLS Kl.7 0402
Shop #: WSC 00000 000 00000

1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent - MIL ON
Freeze Frame:
Mileage: 0 km
Temperature: -70.0°C
Voltage: 0.00 V
Voltage: 0.00 V


-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8P0-959-433.lbl
Part No: 8P0 959 433
Component: KSG H02 0040
Coding: 008800186D288505485AC63000
Shop #: WSC 06435 000 00000

Part No: 1K0 951 605 A
Component: LIN BACKUP HORN H01 1201

Part No: 1K0 907 719
Component: Neigungssensor 002 0002

Part No: 8P0 951 177
Component: Innenraumueberw.H03 0010

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System Labels: 8Px-035-382.lbl
Part No SW: 8P3 035 382 HW: 8P3 035 382
Component: AB2 SUBWOOFERBOXH23 0100
Revision: 00001 Serial number: 10000001061595
Shop #: WSC 00000 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. Labels: 8P0-959-802-MIN1.lbl
Part No: 8P0 959 802 A
Component: Tuersteuerger. H10 0010
Coding: 0000048
Shop #: WSC 06435 000 00000

1 Fault Found:
00933 - Electric Window Motor; Passenger Side (V148)
005 - No or Incorrect Basic Setting / Adaptation - Intermittent

-------------------------------------------------------------------------------
Address 56: Radio Labels: 8P0-035-1xx-56.lbl
Part No SW: 8P0 035 186 HW: 8P0 035 186
Component: concert II EU H53 0060
Revision: 07S Serial number: AUZ2Z3C1481983
Coding: 0001001
Shop #: WSC 06435 000 00000

2 Faults Found:
01317 - Control Module in Instrument Cluster (J285)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 5
Fault Frequency: 6
Reset counter: 143

Freeze Frame:
Bin. Bits: 10

01299 - Diagnostic Interface for Data Bus (J533)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 5
Fault Frequency: 3
Reset counter: 143


-------------------------------------------------------------------------------
Address 7D: Aux. Heat Labels: 1K0-963-235.lbl
Part No SW: 1K0 963 235 C HW: 1K0 963 235 C
Component: PTC-Element 0404
Revision: 00600000 Serial number:
Shop #: WSC 00000 000 00000

No fault code found.

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

All codes have been cleared about 50 times by different people but the same codes always return.

Greg2010

When the car won't start as in pic one attached above, after about 5 mins of the ignition left on in this state the engine fans start up.

When the car 'will start' as in pic two, (notice the mpg is displayed and the engine light is on) and key left in for 5 mins the fans don't start.

Also notice in picture one that the (mpg display is zero) does anyone know why this would be the case, how does this component get it's reading and from where, maybe this could be part of the problem. Someone had suggested the fuel pump as we hear a whistling noice just after the engine light shows indicating that the car is ready to start. (see engine light in pic 2)

Bottle of Champs for the person that fixes this fault

##### see original post for the pictures ######

chittychittybangbang

Feel free to check out my VW and Audi TDI specific forum, myturbodiesel.com. There are a few guys who have taken delivery of Audi A3 TDI there and there are many useful FAQ for TDI.

This sounds like either a bad ECU or bad battery or grounds because of the electrical problems.

I'm 95% sure the fuel pump does not prime when you turn the key to the ON position. It runs when you start the engine. Look through my FAQ on the fuel filter change article because there have been a few reports of bad high pressure fuel pumps (although this wouldn't explain the other problems).

If you are at a high pressure altitude and low temps you can have starting problems.

The whistling noise is probably the EGR self calibrating. When you hear it, put your ear to the EGR and listen. I'm not a frequent visitor to audiworld so please post a follow up on myturbodiesel.com, hope this helps!

MikeSS

From your description and the pictures it looks to me to be a problem in your instrument panel. Since it houses the immobilizer and the MFD computer it could keep you from starting and the first picture shows that the MFD is busted.

Greg2010

Thanks for the update, i've already had the battery replaced as this was one of the first signs of the problems starting.

Any thoughts on why the fans would start when. The other chap that has posted about the instrument panel. I should add that the ECON light did also come on for a short while about 3 months ago and then went off.

At the service , the Audi dealer said there was a fan fault and that the fans would need replacing.

Any thoughts on the Diags results, is the ECU unit the panel under the dashboard next to the internal fues set under the steering wheel?

Any idea how much they are and can they just be replaced without any programming?

this is going to be easier to replace than the clocks, which will need to be re-programmed for the alarm but need to consider what eliminating the faults.

Thanks for taking time to read and respond.

MDL_2010

Hi, sorry to hear your trouble. I am curious about your problem, and I'm a new owner of an Audi A3 (2005). Did anyone suggest changing the main CPU of the car? Is that an option? Have you solved this in some other way?

Greg2010

Have a look at this thread...this is where i've provided the most updates as more peoople have responded from here.

http://www.myturbodiesel.com/forum/s...3232#post13232

The problem was fixed by replacing the ECU - last restort and costly from the Audi deal.

Are

Greg2010

Have a look at this thread...this is where i've provided the most updates as more peoople have responded from here.

http://www.myturbodiesel.com/forum/s...3232#post13232

The problem was fixed by replacing the ECU - last restort and costly from the Audi deal.

Are you having problems with your Audi?

btw- my air con has now stopped.... not sure why yet..any ideas?