Dead electronics ? Car immobilized...

[Tonios92]

Friends, got a tricky one with a Golf IV TDI 115 1J1 from 2001.

Left it standing for a year without starting it and when I reconnected the battery, the locked key symbol came up. No way to start it.
Then it said 'Airbag malfunction', Car locked and on top no electrical windows...
The car starts for 3s but then stops due to the active immobilizer.

Now I found that strange and pulled out my W7 with VCDS on it and gave it a try with autoscan.
As a result, every component in the car (AC, ABS, Engine, Airbags etc.) comes back with all possible errors listed as 'Faulty - Intermittent'.
Never had something like this on my good old Golf IV but it's stranded and I wonder where this issue is located.

Have a look at the VCDS autoscan report below. Every possible component comes back as faulty. There's something central that is bugging or dead.
Suggestions & ideas welcome.

Saturday,28,September,2019,18:50:32:39744
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 17.1.3.0 (x64)
Data version: 20170203 DS267.2
Ross-Tech: Home


VIN: WVWZZZ1JZ2W176050 License Plate:


Chassis Type: 1J (1J - VW Golf/Bora IV (1998 > 2006))
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76

VIN: WVWZZZ1JZ2W176050 Mileage: 219050km-136111miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 038-906-019-AJM.lbl
Part No: 038 906 019 CJ
Component: 1,9l R4 EDC 0000SG 1086
Coding: 00002
Shop #: WSC 01317
VCID: 61CE7EC6EBD2EA4986-4B18

5 Faults Found:
19561 - Valve for Intake Manifold Flap (N239)
P3105 - 35-10 - Open or Short to Ground - Intermittent
17957 - Boost Pressure Regulation Valve (N75)
P1549 - 35-10 - Open or Short to Ground - Intermittent
17849 - EGR Valve (N18)
P1441 - 35-10 - Open Circuit or Short to Ground - Intermittent
17948 - Vehicle Speed Signal
P1540 - 35-00 - Signal too High
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-00 -
Readiness: 0 0 X X X

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1C0-907-37x-ESP-F.lbl
Part No: 1C0 907 379 E
Component: ESP FRONT MK60 0104
Coding: 0019458
Shop #: WSC 01317 785 00200
VCID: 2C50DFF28C90772165-515A

4 Faults Found:
01276 - ABS Hydraulic Pump (V64)
012 - Electrical Fault in Circuit - Intermittent
01044 - Control Module Incorrectly Coded
000 - - - Intermittent
00778 - Steering Angle Sensor (G85)
004 - No Signal/Communication - Intermittent
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 3Bx-907-044.lbl
Part No: 3B1 907 044 C
Component: CLIMATRONIC C 2.0.0
Coding: 11000
Shop #: WSC 01317
VCID: 214E3EC6AB52AA49C6-5196

3 Faults Found:
01206 - Signal for Duration of Ignition Off Time
37-10 - Faulty - Intermittent
01272 - Positioning Motor for Central Flap (V70)
37-10 - Faulty - Intermittent
01274 - Air Flow Flap Positioning Motor (V71)
37-10 - Faulty - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 1C0 909 605 A
Component: 27 AIRBAG VW51 01 02
Coding: 12855
Shop #: WSC 01317
VCID: 224C31CAAE54B151DF-515A

2 Faults Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent
01299 - Diagnostic Interface for Data Bus (J533)
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1J0-920-xx5-17.lbl
Part No: 1J0 920 826 C
Component: KOMBI+WEGFAHRS. BPV V07
Coding: 01124
Shop #: WSC 00000
VCID: 295E26E6D36262099E-515A
WVWZZZ1JZ2W176050 VWZ6Z0A3718975

5 Faults Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01316 - ABS Control Module
49-10 - No Communications - Intermittent
01330 - Central Control Module for Central Convenience (J393)
49-10 - No Communications - Intermittent
01332 - Door Control Module; Passenger Side (J387)
49-10 - No Communications - Intermittent
01128 - Immobilizer Pickup Coil (D2)
35-00 - -

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00006
Shop #: WSC 01317
VCID: 70E80B82303853C119-513C

5 Faults Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01316 - ABS Control Module
49-10 - No Communications - Intermittent
00778 - Steering Angle Sensor (G85)
49-10 - No Communications - Intermittent
01330 - Central Control Module for Central Convenience (J393)
49-10 - No Communications - Intermittent
01332 - Door Control Module; Passenger Side (J387)
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1C0-959-799.lbl
Part No: 1C0 959 799 B
Component: 1C Komfortgerát HLO 0003
Coding: 00259
Shop #: WSC 01317
VCID: 3664FD9A12DC3DF103-4B18

Subsystem 1 - Part No: 1C1959801A
Component: 1C Tõrsteuer.FS KLO 0003

Subsystem 2 - Part No: 1C1959802A
Component: 1C Tõrsteuer.BF KLO 0002

Subsystem 3 - Part No: 1C0959811A
Component: 1C Tõrsteuer.HL KLO 0002

Subsystem 4 - Part No: 1C0959812A
Component: 1C Tõrsteuer.HR KLO 0002

11 Faults Found:
01389 - Tailgate Open Switch (F124)
27-10 - Implausible Signal - Intermittent
01332 - Door Control Module; Passenger Side (J387)
49-10 - No Communications - Intermittent
00849 - S-contact at Ignition/Starter Switch (D)
25-10 - Unknown Switch Condition - Intermittent
00932 - Electric Window Motor; Drivers Side (V147)
35-00 - -
00932 - Electric Window Motor; Drivers Side (V147)
62-10 - No or Incorrect Adjustment - Intermittent
00928 - Locking Module for Central Locking; Front Driver Side (F220)
27-00 - Implausible Signal
00933 - Electric Window Motor; Passenger Side (V148)
35-00 - -
01035 - Electric Window Thermal Protection Active; Passenger
35-10 - - - Intermittent
00934 - Electric Window Motor; Rear Left (V26)
35-00 - -
01036 - Electric Window Thermal Protection Active; Rear Left
35-10 - - - Intermittent
00935 - Electric Window Motor; Rear Right (V27)
35-00 - -

-------------------------------------------------------------------------------
Address 56: Radio Labels: 1J0-035-15x-56.lbl
Part No: 1J0 035 152 F
Component: Radio BNO 0005
Coding: 00003
Shop #: WSC 01317
VCID: 214E3EC6AB52AA49C6-4B00

1 Fault Found:
00852 - Loudspeaker(s); Front
36-10 - Open Circuit - Intermittent

End-------------------------(Elapsed Time: 05:01)--------------------------

[jonathanfenton]

I would do the basics first, make sure all main fuses haven’t corroded and that your earths are all intact and not dead, grab a mutimeter and check that your main rays have clicked to on and are powering all the modules correctly, also check the ecu isn’t sat in water if the plenum chambers have filled with leaves. My guess is the ECU either has a bad earth or it’s buggered. Presume you’ve tried clearing all the faults and done live metering on the core sensors?

[Tonios92]

I would do the basics first, make sure all main fuses haven’t corroded and that your earths are all intact and not dead, grab a mutimeter and check that your main rays have clicked to on and are powering all the modules correctly, also check the ecu isn’t sat in water if the plenum chambers have filled with leaves. My guess is the ECU either has a bad earth or it’s buggered. Presume you’ve tried clearing all the faults and done live metering on the core sensors?

Hey thanks for looking into that. Was away for a couple of days and got right back to the car this afternoon.

All fuses are ok (checked these actually before using the VAGCOM) and the car is dry (no leaves or humidity). I checked all connectors, disconnected & reconnected, battery is fully charged.
I've cleared all error messages and only the immobilizer remains now listed and active. Airbag error message is gone too.
Could it be that the ECU simply desynchronized with both keys ? Car keeps starting like a charm and dies 2 secs after as the immobilizer kills the engine.
I could maybe try to pair again the keys but I've never done that before and I believe I need also the login code that is specific to each ECU.

I could also unmount the ECU first and check its condition.Maybe have a look at the electronic board. I've read that it happens that age actually leads to porous or broken solderings and that redoing these solved the issue.

See the new report below :

Wednesday,09,October,2019,18:20:46:39744
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 17.1.3.0 (x64)
Data version: 20170203 DS267.2
Ross-Tech: Home


VIN: WVWZZZ1JZ2W176050 License Plate:


Chassis Type: 1J (1J - VW Golf/Bora IV (1998 > 2006))
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76

VIN: WVWZZZ1JZ2W176050 Mileage: 219050km-136111miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 038-906-019-AJM.lbl
Part No: 038 906 019 CJ
Component: 1,9l R4 EDC 0000SG 1086
Coding: 00002
Shop #: WSC 01317
VCID: 61CE7EC6EBD2EA4986-4B18

1 Fault Found:
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-00 -
Readiness: 0 0 X X X

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1C0-907-37x-ESP-F.lbl
Part No: 1C0 907 379 E
Component: ESP FRONT MK60 0104
Coding: 0019458
Shop #: WSC 01317 785 00200
VCID: 2C50DFF28C90772165-515A

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 3Bx-907-044.lbl
Part No: 3B1 907 044 C
Component: CLIMATRONIC C 2.0.0
Coding: 11000
Shop #: WSC 01317
VCID: 214E3EC6AB52AA49C6-5196

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 1C0 909 605 A
Component: 27 AIRBAG VW51 01 02
Coding: 12855
Shop #: WSC 01317
VCID: 224C31CAAE54B151DF-515A

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1J0-920-xx5-17.lbl
Part No: 1J0 920 826 C
Component: KOMBI+WEGFAHRS. BPV V07
Coding: 01124
Shop #: WSC 00000
VCID: 295E26E6D36262099E-515A
WVWZZZ1JZ2W176050 VWZ6Z0A3718975

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00006
Shop #: WSC 01317
VCID: 70E80B82303853C119-515A

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1C0-959-799.lbl
Part No: 1C0 959 799 B
Component: 1C Komfortgerát HLO 0003
Coding: 00259
Shop #: WSC 01317
VCID: 3664FD9A12DC3DF103-4B00

Subsystem 1 - Part No: 1C1959801A
Component: 1C Tõrsteuer.FS KLO 0003

Subsystem 2 - Part No: 1C1959802A
Component: 1C Tõrsteuer.BF KLO 0002

Subsystem 3 - Part No: 1C0959811A
Component: 1C Tõrsteuer.HL KLO 0002

Subsystem 4 - Part No: 1C0959812A
Component: 1C Tõrsteuer.HR KLO 0002

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 1J0-035-15x-56.lbl
Part No: 1J0 035 152 F
Component: Radio BNO 0005
Coding: 00003
Shop #: WSC 01317
VCID: 214E3EC6AB52AA49C6-4B00

No fault code found.

End-------------------------(Elapsed Time: 05:07)--------------------------

[jonathanfenton]

Pretty sure if you don’t have the plastic tag with the immobiliser code you have to use the proper VW VPN to get it synchronised. Could try a re-sync but if it were me I’d just get one off a scrapper and get it all coded to save repeat problems unless you’re a dab hand at soldering!