No start engine just cranking after water found in Engine fuse box under ECU

[Tommy5150]

Hi Guys,

Just wanted to see if anyone has any advice for me?

I have a 2005 Audi A4 B7 Avant V6 TDI 2.5

Just got the car recently, had a look at it today to see whats going on and found it did not start just cranked over and over. Found battery to be totally dead so replaced it. Still same just cranked. Next I scanned for faults and got:

Address 01: Engine Labels: 059-907-401-AKE.clb
Control Module Part Number: 8E0 907 401 AF
Component and/or Version: 2.5l V6 TDI G200SG 0060
Software Coding: 02002
Work Shop Code: WSC 40452
Additional Info: WAUZZZ8E25A422173 AUX6Z0D0462930
VCID: 698FBDB9206A1C9338D-4B1E
4 Faults Found

01318 - Control Module for Injection Pump (J399)
03-00 - No Signal
01318 - Control Module for Injection Pump (J399)
49-00 - No Communications
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-00 -
00532 - Supply Voltage B+
28-00 - Short to Plus - Intermittent

Readiness: 0 0 X X 1

Next I heard the radiator fan turning on randomly so I thought to myself short. Opened up the engine fuse box with the ECU and found the relays that sit under the ECU in water (about 1cm on the high side and more on the lower side. The ECU was dry and also it's connections. Just the relays underneath and the fuses. So after drying everything up and cleaning up everything and all the contacts bought all new Relays and also fuses that where there (one big blue one and a small 15a one) check connections with multi-meter continuity mode and all good. Continuity was there at fuses.

Put everything back together and tried to start it and got same thing.

Address 01: Engine Labels: 059-907-401-AKE.clb
Control Module Part Number: 8E0 907 401 AF
Component and/or Version: 2.5l V6 TDI G200SG 0060
Software Coding: 02002
Work Shop Code: WSC 40452
Additional Info: WAUZZZ8E25A422173 AUX6Z0D0462930
VCID: 698FBDB9206A1C9338D-4B1E
4 Faults Found

01318 - Control Module for Injection Pump (J399)
03-00 - No Signal
01318 - Control Module for Injection Pump (J399)
49-00 - No Communications
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-00 -
00532 - Supply Voltage B+
28-10 - Short to Plus - Intermittent only thing that changed was this code went from 28-00 to 28-10

Readiness: 0 0 X X 1

First thing I would like to do is fix the short to plus on supply Voltage B+. Does anyone know where to find this? Does the B+ mean a certain area I can look?

Second thing would love to know why I'm getting an immobilizer block code?

Does the no signal and no communications i'm getting from the injection pump mean the pump itself is gone? Is it possible? And could this be causing the "Engine Start Blocked by Immobilizer" code?

I really thought that after drying and clearing everything the short codes would clear.

Does anyone have any experience with this? Any advice would be very much appreciated.

Thanks