Immobilizer Help

[bryanmabbott]

My 02 Golf TDI is acting up and has me stumped. The immobilizer light (IMMO 3) is flashing and the car will not run as designed by the security system. Yes, battery is reading 12+ volts and about 2 years old.
Things I have done so far:
1) Tried all three keys (including valet key) and all still cause the immobilizer
2) Charged the battery with a smart charger
3) Disconnected battery; touched pos and neg cables to discharge capacitors
4) Checked fuses for resistance, all read <0.3 Ohms except for a ABS Hydraulic fuse on top of the battery, probably not related (and never had a warning for it) but replaced anyways
5) Left different keys in ignition for up to 2 hours --> no change
6) Cleared codes with VCDS --> keeps popping back
7) Cleared codes with VCDS while trying to start --> no change
Would appreciate any ideas. Thanks for all the help in keeping this car going strong.
Here's a VCDS scan if it helps

Sunday,22,September,2019,18:26:33:59772
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 19.6.1.0 (x64)
Data version: 20190529 DS308.0
www.Ross-Tech.com
VIN: 9BWGP61J224017033   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: 9BWGP61J224017033   Mileage: 448830km-278890miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 038-906-012-AGR.clb
Part No: 038 906 012 FD
Component: 1,9l R4 EDC G000SG  4102  
Coding: 00002
Shop #: WSC 00000  
VCID: 57BD95BFB5E418F788-4B00
9BWGP61J224017033     VWZ7Z0A3881907
1 Fault Found:
17978 - Engine Start Blocked by Immobilizer 
P1570 - 35-00 - 
Readiness: 0 0 1 0 1 
-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1C0-907-37x-ABS.lbl
Part No: 1C0 907 379 C
Component: ABS FRONT MK60      0103  
Coding: 0004097
Shop #: WSC 00000 785 00200
VCID: 2A5B1C4B8616551FE7-5140
1 Fault Found:
00668 - Supply Voltage Terminal 30 
008 - Implausible Signal - Intermittent
-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW5.lbl
Part No: 6Q0 909 605 F
Component: 08 AIRBAG VW6  0202 0004  
Coding: 12344
Shop #: WSC 00000  
VCID: 3A7B2C0B26B6E59F97-5106
1 Fault Found:
00532 - Supply Voltage B+ 
07-10 - Signal too Low - Intermittent
-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1J0-920-xx5-17.lbl
Part No: 1J0 920 906 L
Component: KOMBI+WEGFAHRSP VDO V02  
Coding: 07202
Shop #: WSC 00000  
VCID: 31690B27FBC026C726-5106
9BWGP61J224017033     VWZ7Z0A3881907
1 Fault Found:
01176 - Key 
07-00 - Signal too Low
-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901 
Component: Gateway K<->CAN    0001  
Coding: 00006
Shop #: WSC 00000  
VCID: 70EFCE23304A6FCF69-5122
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 1C0-959-799.lbl
Part No: 1C0 959 799 C
Component: 1Q Komfortger·t HLO 0003  
Coding: 00258
Shop #: WSC 00000  
VCID: 377D353F15A4F8F768-4AE8
Subsystem 1 - Part No: 1C1959801A
Component: 1Q Tırsteuer.FS KLO 0002  
Subsystem 2 - Part No: 1C1959802A
Component: 1Q Tırsteuer.BF KLO 0002  
Subsystem 3 - Part No: 1C0959811A
Component: 1Q Tırsteuer.HL KLO 0002  
Subsystem 4 - Part No: 1C0959812A
Component: 1Q Tırsteuer.HR KLO 0002  
1 Fault Found:
01330 - Central Control Module for Central Convenience (J393) 
53-10 - Supply Voltage Too Low - Intermittent
-------------------------------------------------------------------------------
Address 56: Radio        Labels: 3B7-035-1xx-56.lbl
Part No: 3B7 035 180 
Component:    Radio NP2        0005  
Coding: 00033
Shop #: WSC 00256  
VCID: 5DB18797D7D8F2A7D2-5106
No fault code found.
End-------------------------(Elapsed Time: 04:59)--------------------------

 

[bryanmabbott]

Looking at what I posted from the scan as a whole, I might have a ground issue. I cleaned the grounds earlier this year so I'll have to make sure everything is snug in the morning.

 

[Nero Morg]

It actually looks like you need to resync your keys to your car. Clearing the code won't fix this. You're going to need to get the SKC, then use it inside VCDS to code the keys back to the car. Either that, or send your ECM off to a tuner to delete the immobilizer.

 

[ToxicDoc]

Have you done anything to your car right before this happened?

Some of the guys posting have had success just by leaving the key in place and turned to on and leaving it there for several minutes (with a charger in place).

 

[BobnOH]

Yes, when you leave they key in it, you want it ON. Seems like I've read you leave it on for like 3 or 4 hours.
This always pisses me off that a car not stolen or with certain components replaced would require re-acquisition of the secret code. I mean that's just bull stuff.

 

[bryanmabbott]

Grounds were clean. I did leave the key in the ignition switched to on for more than 3 hours today while connected to a charger as suggested. No dice. Called the local TDI guru and he suggested an Immobilizer delete which I’m kind of iffy on doing. The alternative was buying a new cluster but from their experience the part is in short supply.

I did replace the drivers side inner cv joint and left the key in the ignition but off to prevent the steering wheel from locking. Was not connected to a charger. However car was fine the first five starts after the job.

 

[Tdijarhead]

I’d just get the immo delete. You have an 02 so it’s unlikely anyone will steal it, and if it’s a 5spd manual that shrinks the pool of potential car thieves by about %75 anyway.

My daughter has an immo delete on her 01 and after I covered the flashing immo light with a piece of electrical tape you wouldn’t even know the delete was done.

That still doesn’t address the reason for the no start condition in the first place though.

 

[jokila]

Grounds were clean. I did leave the key in the ignition switched to on for more than 3 hours today while connected to a charger as suggested. No dice. Called the local TDI guru and he suggested an Immobilizer delete which I’m kind of iffy on doing. The alternative was buying a new cluster but from their experience the part is in short supply.

I did replace the drivers side inner cv joint and left the key in the ignition but off to prevent the steering wheel from locking. Was not connected to a charger. However car was fine the first five starts after the job.

If you are going to replace the cluster you WILL HAVE to do the same work that it would take to resync the current ECU and cluster. I would try to do that before replacing a cluster.

immo delete is definitely a good option. You really have little likelihood of auto theft of a 18 year old car.