2005 A4 B6 6speed quattro No Dash No Start

   #1  

rprellidzynr

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All,

Just wrapped up a bent valve / stripped timing belt repair on a 1.8t A4 B6 6speed quattro car. Ran fantastic for about two hours, 40mpg on cruise at 60, good power, etc.

Two things happened withing minutes of each other on the same drive. I believe them to be unrelated, but in the interest of full disclosure:

1) Boost pipe slipped off, causing driveability issue. Easy fix, tightened hose clamp.
2) Dash went dead. No gauges or LCD displays. The temp and fuel gauges were showing where they were, as these gauges don't move quickly anyway normally, so they were stuck / hung or they were actually reading normally, I don't know.

On reaching home, I tightened the boost hose clamp, and disconnected the battery for many minutes in an attempt to clear up whatever shut down the dash. Now I have these symptoms:

a) The only dash response / display is airbag and traction lights. No other indications.
b) Hand-held scanner says it can't communicate.
c) When trying to start, engine runs for one second and shuts off. Feels like an immobilizer issue.

VCDS Scan:

Code:
Monday,25,February,2019,07:48:02:28853
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 8.1 x64
VCDS Version: 18.2.1.2 (x64)  HEX-V2 CB: 0.4411.4
Data version: 20180518 DS287.1
www.Ross-Tech.com


VIN: WAULC68E35A021673   License Plate: 



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


Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
          67 69 75 76 77
 
VIN: WAULC68E35A021673   
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 06B-909-518-AMB.lbl
   Part No SW: 8E0 909 518 BC    HW: 8E0 909 018 A
   Component: 1.8L R4/5VT     G   0010  
   Revision: 00000000    Serial number: AUZ6Z0D0232993
   Coding: 0016711
   Shop #: WSC 63351 000 00000
   VCID: 72BD266498B82AC7773-5160

9 Faults Found:
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!) 
            P1297 - 002 -  - Intermittent
17519 - Oxygen (Lambda) Sensor Regulation: Bank 1 
            P1111 - 002 - System too Lean - Intermittent
17535 - Fuel Trim; Bank 1 (Mult) 
            P1127 - 002 - System too Rich - Intermittent
16556 - Fuel Trim; Bank 1 
            P0172 - 002 - System Too Rich - Intermittent
18107 - Powertrain Data Bus 
            P1699 - 008 - Missing Message from Steering Wheel Electronics
18058 - Powertrain Data Bus 
            P1650 - 004 - Missing Message from Instrument Cluster
18043 - Powertrain Data Bus 
            P1635 - 008 - Missing Message from A/C Controller
17978 - Engine Start Blocked by Immobilizer 
            P1570 - 008 - 
18010 - Power Supply Terminal 30 
            P1602 - 002 - Voltage too Low - Intermittent
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8E0-614-517.lbl
   Part No: 8E0 614 517 A
   Component: ABS/ESP allrad      4529  
   Coding: 04275
   Shop #: WSC 06435  
   VCID: 26150A3461F006672BB-51CE

2 Faults Found:
01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30 
            35-00 -  - 
01317 - Control Module in Instrument Cluster (J285) 
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
   Part No: 8E0 820 043 AD
   Component:   A4 Klimaautomat   1424  
   Coding: 00000
   Shop #: WSC 63351  
   VCID: 639353205242B34F0C5-5160

7 Faults Found:
00716 - Air recirculation Flap Positioning Motor (V113) 
            41-10 - Blocked or No Voltage - Intermittent
00819 - High Pressure Sensor (G65) 
            30-10 - Open or Short to Plus - Intermittent
00532 - Supply Voltage B+ 
            52-10 - Supply Voltage Too High - Intermittent
00532 - Supply Voltage B+ 
            53-10 - Supply Voltage Too Low - Intermittent
01317 - Control Module in Instrument Cluster (J285) 
            49-00 - No Communications
00474 - Control Module for Immobilizer 
            49-00 - No Communications
00474 - Control Module for Immobilizer 
            27-00 - Implausible Signal

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 8E0-907-279-8E2.lbl
   Part No: 8E0 907 279 F
   Component: int. Lastmodul  USA 0517  
   Coding: 00003
   Shop #: WSC 63351  
   VCID: 3537DD78AC567DFF921-4B00

4 Faults Found:
01317 - Control Module in Instrument Cluster (J285) 
            49-00 - No Communications
01317 - Control Module in Instrument Cluster (J285) 
            79-00 - Please Check Fault Codes
00474 - Control Module for Immobilizer 
            49-00 - No Communications
01332 - Door Control Module; Passenger Side (J387) 
            49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 8E0-959-655-84.lbl
   Part No: 8E0 959 655 K
   Component: Airbag 8.4EP        1001  
   Coding: 0010607
   Shop #: WSC 63351 000 00000
   VCID: 3FDBBF509B6AB7AF48D-5184

2 Faults Found:
00474 - Control Module for Immobilizer 
            004 - No Signal/Communication - MIL ON
01739 - Crash Sensor for Front Airbag; Pass. Side (G284) 
            011 - Open Circuit - Intermittent

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8E0-953-549.lbl
   Part No: 8E0 953 549 N
   Component: Lenksáulenmodul     0611  
   Coding: 01041
   Shop #: WSC 63351  
   VCID: 3E25C2549960BEA743B-4B00

2 Faults Found:
01317 - Control Module in Instrument Cluster (J285) 
            49-00 - No Communications
00474 - Control Module for Immobilizer 
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 8E0-959-433-MAX.clb
   Part No: 8E0 959 433 BB
   Component: Komfortgerát T7B    1612  
   Coding: 11788
   Shop #: WSC 63351  
   VCID: 72BD26649DB82AC7773-4B00

   Subsystem 1 - Part No: 8E1959801
   Component: Tõrsteuer.FS BRM 0205  

   Subsystem 2 - Part No: 8E1959802E
   Component: Tõrsteuer.BF BRM 0204  

   Subsystem 3 - Part No: 8E0959801A
   Component: Tõrsteuer.HL BRM 0205  

   Subsystem 4 - Part No: 8E0959802A
   Component: Tõrsteuer.HR BRM 0205  

7 Faults Found:
01330 - Central Control Module for Central Convenience (J393) 
            52-10 - Supply Voltage Too High - Intermittent
01330 - Central Control Module for Central Convenience (J393) 
            53-10 - Supply Voltage Too Low - Intermittent
01317 - Control Module in Instrument Cluster (J285) 
            49-00 - No Communications
00956 - Key 2 
            35-10 -  -  - Intermittent
01331 - Door Control Module; Driver Side (J386) 
            80-00 - Single-Wire Operation
01031 - Central Locking Key Switch; Driver Side; Unlock 
            27-10 - Implausible Signal - Intermittent
01332 - Door Control Module; Passenger Side (J387) 
            53-10 - Supply Voltage Too Low - Intermittent

End----(Elapsed Time: 06:17, VBatt start/end: 11.9V/12.0V. VIgn 11.9V)-----

It feels like some master fuse has failed, or some major basic component is not supplying power to the entire car's systems.

Thank you in advance for any help you can provide.
 
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Uwe

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The Immobilizer is integral to the Instrument Cluster, so if the cluster doesn't power up, the the negotiation between the ECU and the Immo will fail and the ECU will shut down the engine after a second or two.

Check fuses?

-Uwe-
 
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rprellidzynr

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The Immobilizer is integral to the Instrument Cluster, so if the cluster doesn't power up, the the negotiation between the ECU and the Immo will fail and the ECU will shut down the engine after a second or two.

Check fuses?

-Uwe-

Uwe,

I have checked fuses and removed and reseated the two instrument cluster connectors to no avail. The cluster failed while driving, and the car ran another 15 minutes without issue. Does the immobilizer only audit the key on startup?

Rob
 
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Jack@European_Parts

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rprellidzynr

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Jack,

This car is a touch north of 180k miles.

Just some further checking:

Three metal-bodied fuses on CCM check good. Replaced fuses, no change.
Removed and reseated three connectors on CCM. No change.
Checked fusebox fuse #15, 10A, checks good, with key on there is 12v on one leg in the fusebox for fuse #15. Replaced fuse, no change.

Rob
 
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rprellidzynr

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Jack,

This car is a touch north of 180k miles.

Just some further checking:

Three metal-bodied fuses on CCM check good. Replaced fuses, no change.
Removed and reseated three connectors on CCM. No change.
Checked fusebox fuse #15, 10A, checks good, with key on there is 12v on one leg in the fusebox for fuse #15. Replaced fuse, no change.

Rob

So if I were to push start this car (it is a stick), would the ECM know to ask the immobilizer to audit the key? Or if I test-wire commanded the starter to run? I'm looking for a way to segregate the immobilizer issue from the cluster issue.
 
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Jack@European_Parts

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So if I were to push start this car (it is a stick), would the ECM know to ask the immobilizer to audit the key? Or if I test-wire commanded the starter to run? I'm looking for a way to segregate the immobilizer issue from the cluster issue.

Nope you must fix the cluster and re-establish communications so the ECU will be authorized and so the MIL will illuminate when needed.
 
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Uwe

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I'm looking for a way to segregate the immobilizer issue from the cluster issue.
You can't really do that. Again, the immobilizer is an integral part of the instrument cluster in that car.

-Uwe-
 
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Radiosolutions

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Try a battery reset for about half hour. If not dash have to be repaired. Normally dry solder joints.
 
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rprellidzynr

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Try a battery reset for about half hour. If not dash have to be repaired. Normally dry solder joints.

Copy that. Yeah, I went battery disconnected for more than a hour. No change. This car sat outside broken for two years so anything's possible. Cluster repair.
 
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MartinsX

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I'd suggest to start with getting WD and checking GND, 30 and 15 supply and CAN lines to cluster. As well as charging battery, clearing all fault codes and posting a fresh autoscan after a starting attempt. That will give us clear view what is actually missing. From scan above its really hard to say are
Code:
00532 - Supply Voltage B+ 
            52-10 - Supply Voltage Too High - Intermittent
00532 - Supply Voltage B+ 
            53-10 - Supply Voltage Too Low - Intermittent
faults actual or from previous times when car was left alone broken fo a while.
 
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rprellidzynr

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I'd suggest to start with getting WD and checking GND, 30 and 15 supply and CAN lines to cluster. As well as charging battery, clearing all fault codes and posting a fresh autoscan after a starting attempt. That will give us clear view what is actually missing. From scan above its really hard to say are
Code:
00532 - Supply Voltage B+ 
            52-10 - Supply Voltage Too High - Intermittent
00532 - Supply Voltage B+ 
            53-10 - Supply Voltage Too Low - Intermittent
faults actual or from previous times when car was left alone broken fo a while.

Martin,

The car came to me with a dead battery. I drove it for approximately two hours and everything was fine. I'd have to say the VCDS scan represents a clear view of the current condition. All the 'no communication' faults fit a failed cluster. I have voltage and no blown fuses feeding the cluster. Also the car does not respond to the key fob, and I am unsuccessful trying to re-sync the key, telling me the immobilizer has gone to the big dash cluster in the sky.

Thank you for trying to help, sir, I do appreciate it.

Best,

Rob
 
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Jack@European_Parts

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The key FOB is sent an antenna charge from the cluster which contains the immobilizer to the key coil and if no cluster means no immobilizer.

I have clusters and can assist with a real data transfer & if credentials are submitted with continuity for ownership verification.
 
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Jack@European_Parts

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I have a brand new color information screen cluster for this car too if interested..........
 
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rprellidzynr

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I have a brand new color information screen cluster for this car too if interested..........

Ok, so this gets odder and odder. I stop by the wrecking yard today and pick up an A4 cluster. I don't care about part number, I just wanted a Gen 3 immobilizer I could communicate with. Figured I would sync the old key to the new cluster and even if the gauges were wonky I could drive the car while my cluster went out for repair. So I have the old and new clusters in the car, and for a sanity check I'll put the old cluster in one more time. Now take a wild guess what happened?! Of course, the old cluster lit right up and all my stars aligned. Car runs like a top. I'll now do a Controller Channels Map this weekend so I have the baseline info from the old cluster should this event reappear. Apparently having a replacement cluster on hand frightened to old cluster enough that she straightened up. For now.
 
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Jack@European_Parts

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Loose connection or solder joint as aforementioned by a prior collective participant.

Verify and investigate.
 
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Uwe

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Unplug, re-plug, and it works?

First thing I'd do is get some contact conditioner onto the harness plugs and cluster pins.

-Uwe-
 
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Jack@European_Parts

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Unplug, re-plug, and it works?

First thing I'd do is get some contact conditioner onto the harness plugs and cluster pins.

-Uwe-

Indeed!


Did you take apart and look for water and give a scrape with one of these but be careful with it and use caution?


51dLD8zrFDL._SR500,500_.jpg
 
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