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Car won't start - electrical fault?


cheet22
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Just a wild thought here, just before I left the car for 2 weeks and all this happened, I had a new cambelt, water pump etc

Don't suppose anyone knows if theres any earths around that area that the garage might have not tightened, and hence cause my problem?

Tell me if I'm just being a desperate Dan now please...

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I've been checking out the manual and found this:

Immobilizer self-diagnosis - immobilizer III

Adaption following replacement of dash panel insert

Notes:

â—† The dash panel insert (with integrated immobilizer) is adapted to the engine control unit. Adaption to the engine control unit must be performed if the dash panel insert is replaced.

â—† After adapting dash panel insert to engine control unit, vehicle key matching is required => Page 01-180.

â—† If there is no authorized ignition key available, engine control unit and all keys must also be replaced=> Page 01-216.

Requirement:

â—Ź Vehicle diagnostic, testing and information system VAS 5051 connected up and vehicle self-diagnosis selected => Page 01-340

Sequence of operations

‒ Insert old (authorized) ignition key in ignition lock and switch on ignition.

‒ Establish immobilizer identification number by starting immobilizer self-diagnosis at old dash panel insert => Page 01-161.

If this is not possible:

‒ Establish immobilizer identification number by starting engine control unit self-diagnosis

TBH we're running blind from here on in until you get some codes read from vagcom; I'd offer to read the codes but seeing as were at opposite ends of the country... frown.gif

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[ QUOTE ]

you think i should check ECU before cluster?

[/ QUOTE ]

Wow this is so frustrating.... Im so close to just drivign up there to take a look as its hard to beleive its so fried after 2 weeks stood - but its still a good 3 hours each way, not to mention ÂŁ100 in fuel....

I'm assuming that *everything* else works on the car, from windows to mirrors to vanity lights, stereo, puddle lights, sunroof etc - If so, then I think we can stop chasing fuses, damp patches and dodgy earths.

It must be something to do with the immobiliser, either the ECU, Cluster or Key. Im assuming you've tried other keys if you have them, but the way the instrument cluster is behaving, thats got to be no 1 suspect - but why oh why...!!!

Can we get pictoral on this - Can you take a few photos of the dash in its half working state, and interior etc - It may all look spot on to you, but we might just spot something.

Ska is right though, Vag com right now would save so much guess work. I'd post mine up to you, but I'm using it extensively at the moment... :-(

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Guys, cannot thank you enough here. This is my baby, and I just have to get her back on the road!

I have VAG COM working now (albeit shareware) - do I need a full version to do what you need? Or can I do it with what I have (BTW its a cheapo cable too)

Something Ska said got me googling a bit more there - about fault codes. Found this on the Ross-tech site:

http://wiki.ross-tech.com/index.php/17978/P1570

Two things jump out:

1. ECU power relay - any idea where that is?

2. Cold boot note at bottom - gotta be worth a try

More than happy to get the camera out tomorrow AM - will do - anythings worth a try!

Cheers again chaps.

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I don't see the harm of trying that method of shorting the batter cables together (without touching the battery itself of course EEK2.GIF) But I'm thinking this is an adaption thing it would be good to see some pics of the semi lite dash especially if everything else is working ok 169144-ok.gif

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If you've got VAGcom working then try interogating the modules and see what you get. I can't remember what the Shareware version is limited to but its worth a shot. That pic doesn't look like right; in that it almost looks as if the DIS and trip info is being consealed perhaps because the key is not being reconised and the immoy/dash cluster needs the adaption doing to it, perhaps

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I can't connect to immob or instruments modules at all. I connected to all the modules I could, and on each, cleared the codes then checked again. Only errors now are as follows:

On Engine test I get error:

18058 - Powertrain Data Bus: Missing Message from Instrument Cluster

On ABS test I get error:

01203 - Electrical connection between ABS and Instrument Cluster 31-00 Open or Short to Ground

Ive tried connecting the battery terminals together - no joy there.

Ive tried leaving ignition on an hour, no joy either - although as I was sitting in the car thinking, I saw that the ABS light and the EPS light, and the Air Bag light (which were off after first couple seconds) slowly lit up - kinda faded in over 20 seconds or so, then stayed on. Weird.

Earlier in this post I also mentioned Seat Belt warning light came on the other day - spoeaking with the Mrs, we're sure this has NEVER been seen since we had the car (18months). Likewise with immob light. I guess they could have been there and gone so fast we dont notice, but I think I would have recognized it to be honest.

Ive not been leaving battery connected in case my new battery gets drained, but Im gonna leave it connected now for couple hours see if that does anything (really am clutching now)

Ive PM'd Pschye who might have a proper Vag Com cable - so maybe I can get further with that if he is able to lend it to me.

One thing Ive been reading is about this code I'd need to login and reset the immob or whatever (adaption?) - I have only one key, no code anywhere. Can I get this from somewhere, or is it a dealer job?

I'm getting to a very sick feeling this is gonna cost me dear......

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Perhaps that connection from the abs to instrument cluster is the cause seeing as its shorted; I'll see if I can find the wiring diagram 169144-ok.gif

These are all the codes pertaining to Immoby issues, so I don't think its the immoby any more but your open circuit:

Self-diagnosis of immobiliser - variable code version

Fault table for immobiliser

Notes:

; The following table lists all faults that can be recognised by immobiliser control unit and printed out by V.A.G 1551. The faults are listed in order according to their 5-figure code numbers.

; Fault codes appear only on print-out.

; Before replacing a component shown as faulty, check wiring and connections to component as well as earth connections according to current flow diagram.

; Once repairs have been completed, fault memory is always to be interrogated again with fault reader V.A.G 1551 and erased.

; The fault memory records all static and sporadic faults.

If a fault occurs and persists for at least 2 seconds, it is identified as a static fault. If fault does not occur again it is registered as a sporadic fault. "/SP" appears on right of display.

; When ignition is switched on, all existing faults are automatically reclassified as sporadic faults and will only register as static faults if they still occur after testing.

; Sporadic faults which no longer occur after 50 driving cycles (ignition on for at least 5 minutes, road speed of > 30 km/h) are erased automatically.

V.A.G 1551 print-out

Possible fault cause

Fault elimination

01128

immobiliser reader coil-D2

Open circuit in reader coil wiring or connector not attached at control unit.

- Check reader coil, wiring and connector (visual check); if necessary, replace reader coil.

=> Page

immobiliser control unit defective.

- Erase fault memory, then interrogate again ( => Page 01-76); if necessary, replace dash panel insert.

=> Page

01176

Key

Signal too low

Fault in wiring between reader coil and immobiliser control unit (contact resistance/loose contact).

- Check reader coil, wiring and connector (visual check); if necessary, replace reader coil.

=> Page

Electronic component (transponder) in key missing or not working.

- If other keys are OK, replace defective ignition key, match all ignition keys again and test => Page 01-85.

V.A.G 1551 print-out

Possible fault cause

Fault elimination

01176

Key

Not authorised

Ignition key fits in lock but has not been matched.

- Match all ignition keys again and test => Page 01-85. This fault is then erased automatically.

01177

Engine control unit

Not authorised

Engine control unit not adapted.

- Adapt engine control unit

=> Page 01-99.

Open circuit or short circuit in W wire

- Test W wire using current flow diagram

V.A.G 1551 print-out

Possible fault cause

Fault elimination

01179

Incorrect key programming

Fault has occurred during ignition key matching.

- Match all ignition keys again exactly as specified =>Page 01-85.

65535

Control unit

Defective

immobiliser control unit defective.

- Fit a new immobiliser control unit

=> Page

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Oh and this is what the manual says about the second code:

ARE YOU ABSOLUTELY SURE YOU'VE CLEANED PULLED APART AND CLEAN WITH CONTACT CLEANER AND SOME WIRE WOLL ETC THAT GREEN CONNECTOR IN THAT BLACK BOX!

1196238-ecuconnectors.JPG

V.A.G 1551 printer

Possible causes of fault

Fault remedy

Fault code

01203

ABS/dash panel insert electrical consumer

Open circuit/short circuit to earth

Continued next page.

- Open circuit in wiring from dash panel insert -218 to ABS control unit -J104.

- Short to earth in wiring from dash panel insert -J218 to control unit -J104.

- Check wiring between dash panel insert -218 (green connector, contact 11) and control unit -J104 (contact 32).

=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations

V.A.G 1551 printer

Possible causes of fault

Fault remedy

Fault code

01203

ABS/dash panel insert electrical consumer

Open circuit/short circuit to earth

Continued:

- ABS control unit -J104 defective.

Note: Replacement of the control unit is always the final option.

- If wiring is OK check TIM signal (standing time signal) on vehicles with automatic air conditioner both with control unit connected and disconnected using measured value blocks for air conditioner -J301. If air conditioner control unit -J301 signal is detected replace ABS control unit -J104.

Continued next page.

- Dash panel insert -J218 defective.

Note: Replacement of the control unit is always the final option.

- Replace dash panel insert -J218 if ABS control unit -J104 still does not recognise the TIM signal.

V.A.G 1551 printer

Possible causes of fault

Fault remedy

Fault code

01203

ABS/dash panel insert electrical consumer

Open circuit/short circuit to earth

Continued:

Continued next page.

- Control unit for air conditioner -J301 defective.

Note: Replacement of the control unit is always the final option.

- If TIM signal is also not recognised by air conditioner control unit -J301 disconnect control unit -J301 and check TIM signal using measured value blocks for ABS control unit.

Function 08 "Read measured value block" => Page 01-442.

Replace air conditioner control unit -J301 if control unit -J104 now recognises TIM signal.

V.A.G 1551 printer

Possible causes of fault

Fault remedy

Fault code

01203

Continued:

ABS/dash panel insert electrical consumer

No signal

- Short to positive in wiring from dash panel insert -J218 to control unit -J104.

- Check wiring between dash panel insert -218 (green connector, contact 11) and control unit -J104 (contact 32).

=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations

Continued next page.

- ABS control unit -J104 defective.

Note: Replacement of the control unit is always the final option.

- If wiring is OK check TIM signal (standing time signal) on vehicles with automatic air conditioner both with control unit connected and disconnected using measured value blocks for air conditioner -J301. If air conditioner control unit -J301 signal is detected replace ABS control unit -J104.

V.A.G 1551 printer

Possible causes of fault

Fault remedy

Fault code

01203

ABS/dash panel insert electrical consumer

No signal

Continued:

- Control unit for air conditioner -J301 defective.

Note: Replacement of the control unit is always the final option.

- If TIM signal is also not recognised by air conditioner control unit -J301 disconnect control unit -J301 and check TIM signal using measured value blocks for ABS control unit.

Function 08 "Read measured value block" => Page 01-442.

Replace air conditioner control unit -J301 if control unit -J104 now recognises TIM signal.

- Dash panel insert -J218 defective.

Note: Replacement of the control unit is always the final option.

- Replace dash panel insert -J218 if ABS control unit -J104 still does not recognise the TIM signal

post-5048-137914403712_thumb.jpg

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100%

Just checked it all again there, its clean and well connected. Checked them all again

Im kinda heading towards getting my cluster rebuilt as the next step, with so many lights not working etc. Even the backlight to the dash aint working when I turn the headlights on

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Yeah, the guy did say he thinks it needs "reset", so I'm gonna get it back to him.

I actually called Audi today and managed to get through to some technical guy to explain the problem. He told me he's seen this before when you have a dead battery and change it for another. So, I'm a little more hopeful now...but still, I dont get it...Ive had a flat battery before and it was ok when jumped etc - but maybe its coz it was off for 2 weeks and then jumped or summat...no idea

All I know is its time to get to the experts me thinks..

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  • 3 weeks later...

Ok,

My guy at A4Audi in Glasgow has identified this as a bust instrument cluster.

Hes got the code from it, just a case now of finding a second hand one with specific model/software apparently - which might not be quite so easy!

Anyone any ideas let me know. Its a 2000 A8 3.7 QS, part I need is below:

Instrument cluster

Audi part no: 4D0919931KX

VDO No: VDO110308904044

Software Version: D40

This has THREE multi plug sockets on rear.

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  • 14 years later...

So I came home from work today drove about 75 miles no problem parked the car came back 15 min later and tried starting it and nothing, thought it was my starter and then I tried it again 25 min later and it turned over but had to give it gas for it to fire it started but all my dummy lights came on and I have no power steering anyone have any thoughts 

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