Won't Crank After ECU removal,w/logs

[Tmparry01]

Hi all, been into the e-box to diagnose faulty temp sensor wiring. So battery out, ebox open, some relays out and ecu removed. Buttoned it all back together and now it won't even crank over.

Have the following errors. Any ideas?


Friday,31,January,2025,20:37:26:11262
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 24.7.1.0 (x64) HEX-V2 CB: 0.4643.5
Data version: 20240919 DS356.3
www.Ross-Tech.com


VIN: WV1ZZZ7HZJH169588 License Plate: Y8TTP
Mileage: 48630 Repair Order:



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Address 01: Engine Labels: 04L-907-309-V2.clb
Control Module Part Number: 04L 906 056 KL HW: 04L 907 445
Component and/or Version: R4 2.0l TDI H02 6166
Software Coding: 00194014432401090000
Work Shop Code: WSC 02762 790 50316
ASAM Dataset: EV_ECM20TDI03004L906056KL 004012 (VN75)
ROD: EV_ECM20TDI03004L906056KA.rod
VCID: 01585A20918BB5E2505-8054
5 Faults Found:

28254 - Fuel Pump Relay Control Circuit
P0627 00 [10100011] - Open Circuit
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 78265 km

Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 20 °C
Intake air temperature: 0 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 11.734 V
Unlearning counter according OBD: 40
Mass airflow sensor 1 bank 1 airflow: raw value: 0.0 mg/stroke
Fuel temperature sensor 1: B1: raw value: 12.2 °C
Fuel level: 0 l


27277 - System Voltage
P0562 00 [00100011] - Too Low
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 78265 km

Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 19 °C
Intake air temperature: 0 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 11.867 V
Unlearning counter according OBD: 40
Air mass at air mass meter 1: 0.0 kg/h
Standardized air flow ratio: 1.000 counts
Exhaust recirc.valve 1 bank 1: posit.feedback - Actual value: -0.28 %
Throttl.valve adapt. 1 bank 1: posit feedback - Actual value: 0.00 %
Charge air pressure: specified value: 0.000 bar
Absolute intake pressure: 100 kPa abs
Mean injection quantity: 0 mg/stroke
Index of current engine mode: 0
Index of next requested engine mode: 0
Index of engine target mode: 0

25670 - Control Circuit for Starter Relay 2
P3049 00 [00100011] - Open Circuit
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 0 km
Date: 2076.01.31
Time: 00:02:32

Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 20 °C
Intake air temperature: 3 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 11.687 V
Unlearning counter according OBD: 40
Starter control: terminal 50 feedback-Terminal 50 on CAN: not active
Starter control: terminal 50 feedback-Terminal 50 CAN valid: active
Starter control: terminal 50 feedback-Terminal 50 via cable: not active
Starter control: terminal 50 feedback-Starter relay: not active
Starter control: terminal 50 feedback-Starter operation read back wire T50Ret: not active
Starter control: terminal 50 feedback: 8
Status of starter activation relay-Relay 1 activated: not active
Status of starter activation relay-Relay 2 activated: not active
Starter control: shut-off conditions 1-Immobilizer: not active
Starter control: shut-off conditions 1-Starter shift malfunction: not active
Starter control: shut-off conditions 1-Speed: not active
Starter control: shut-off conditions 1-Drivetrain: not active
Starter control: shut-off conditions 1-Speed: active
Starter control: shut-off conditions 1-RPM aborted starts: active
Starter control: shut-off conditions 1-Engag. duration: not active
Starter control: shut-off conditions 1-Engag. duration aborted starts: not active
Starter control: shut-off conditions 1-Engag. duration panic start: not active
Starter control: shut-off conditions 1-new errors: not active
Starter control: shut-off conditions 1-manual start/error: not active
Starter control: shut-off conditions 1-ignition: not active
Starter control: shut-off conditions 1-Clutch error/terminal 50 malfunction: not active
Starter control: shut-off conditions 1-Direct start function: not active
Starter control: shut-off conditions 1-Engag. duration defrost.: not active
Starter control: shut-off conditions 1: 768

25672 - Control Circuit for Starter Relay 2
P3048 00 [10100011] - Short to Ground
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 78265 km

Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 19 °C
Intake air temperature: 0 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 11.875 V
Unlearning counter according OBD: 40
Starter control: terminal 50 feedback-Terminal 50 on CAN: not active
Starter control: terminal 50 feedback-Terminal 50 CAN valid: active
Starter control: terminal 50 feedback-Terminal 50 via cable: not active
Starter control: terminal 50 feedback-Starter relay: not active
Starter control: terminal 50 feedback-Starter operation read back wire T50Ret: not active
Starter control: terminal 50 feedback: 8
Status of starter activation relay-Relay 1 activated: not active
Status of starter activation relay-Relay 2 activated: not active
Starter control: shut-off conditions 1-Immobilizer: not active
Starter control: shut-off conditions 1-Starter shift malfunction: not active
Starter control: shut-off conditions 1-Speed: not active
Starter control: shut-off conditions 1-Drivetrain: not active
Starter control: shut-off conditions 1-Speed: not active
Starter control: shut-off conditions 1-RPM aborted starts: active
Starter control: shut-off conditions 1-Engag. duration: not active
Starter control: shut-off conditions 1-Engag. duration aborted starts: not active
Starter control: shut-off conditions 1-Engag. duration panic start: not active
Starter control: shut-off conditions 1-new errors: not active
Starter control: shut-off conditions 1-manual start/error: not active
Starter control: shut-off conditions 1-ignition: not active
Starter control: shut-off conditions 1-Clutch error/terminal 50 malfunction: not active
Starter control: shut-off conditions 1-Direct start function: not active
Starter control: shut-off conditions 1-Engag. duration defrost.: not active
Starter control: shut-off conditions 1: 512


Readiness: N/A

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Address 01: DTCs cleared
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Address 01: DTCs cleared
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Address 01: DTCs cleared

 

[oldiebut goodie]

Start with the basics I should have thought - everything above says flat battery to me before we get to a short to ground.

 

[Tmparry01]

I'll try jumping another battery onto it but see the voltage readings above as Voltage terminal 30: 11.875 V

 

[Tmparry01]

Start with the basics I should have thought - everything above says flat battery to me before we get to a short to ground.

Ok tried jumping another battery no better. I have vcds so can runsome tests if I know which blocks to look at....

 

[Dellmassive]

Charge the battery over night.

RE connect it. Then re scan for codes.

Make a note of any codes, then clear them all.

Cycle ignition and see what codes come back.


.......

If you had the battery and ebox open, it may be a relay in the wrong place, or blown fuse, loose connection etc.

 

[Pauly]

That’s exactly what I would do ^^^^

 

[Tmparry01]

That’s exactly what I would do ^^^^

I've put on charge, see what happens in the morning

 

[Tmparry01]

Major crisis overted.... All back together and original problem fixed. Mice had got to the ecu plug pins

 

[Dellmassive]

two bent pins?

 

[Tmparry01]

two bent pins?

Yep struggled a bit plugging back in the first time and must have done it then.