Q 7 3.0 tdi / engine code BUG possible ECU fail

[andreo]

Hello DK members,
I have a situation with an Audi Q 7 model 2006 3.0 tdi BUG engine code- BUG
-engine car shut down while driving – switch of ignition and started again –engine started run for 2 miutes and stops again and never starts.
-afted ECU scan found some fault codes (see attached below)
Actions taked
-measured all 6 fuel inectors wires – ok
-checked fuel pressure on rail while crancking the engine – no fuel
-checked the regulator from rail with Osciloscop – square signal ok
-checked the CR fuel pump regulator with Osciloscope-square signal ok
- checked when ignition is put to on position if fuel pump from fuel tank runs - no fuel pump noise
- if i close the fuel pump relay manualy fuel tank pump runs feed fuel to fuel filter
Questions:

1. if I am not wrong when ignition is on engine ECU command the fuel tank fuel pump relay, in this condition Engine ECU is bad ?
2. it is possibile that the steering colum start autorisation module to be bad (relay or switch inside)?

Note:

• when ignition is on all instrument cluster light are ok
• when key is turn to crank the engine engine is cranking but no start and no fuel

3. what is th meaning of : 005648 - Internal Control Module
P1610 - 006 - Memory Check Sum Error - MIL ON
4. next step is to open the ECU to see if is any damage inside ?


Saturday,27,June,2020,13:31:31:05031
Data version: 20141022


License Plate: Q7Q7Q7
Mileage: 224858
--------------------------------------------------------------------------------
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Address 01: Engine Labels: Redir Fail!
Control Module Part Number: 4L0 910 401 K HW: 4L0 907 401
Component and/or Version: 3.0L V6TDI G001AG 0030
Software Coding: 0011779
Work Shop Code: WSC 80093 222 69422
VCID: 2A5C9A8785EC8E7111F-807F
8 Faults Found:
004160 - Supply Voltage A for Injectors
P1040 - 003 - Circuit Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100011
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 224855 km
Time Indication: 0
Date: 2020.06.24
Time: 08:15:25

Freeze Frame:
RPM: 798 /min
Torque: 97.5 Nm
Speed: 0.0 km/h
Inj. Quantity: 9.3 mg/str
Voltage: 14.29 V
Pressure: 291.1 bar
Temperature: 19.8°C
004162 - Supply Voltage B for Injectors
P1042 - 003 - Circuit Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100011
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 224855 km
Time Indication: 0
Date: 2020.06.24
Time: 08:15:25

Freeze Frame:
RPM: 798 /min
Torque: 97.5 Nm
Speed: 0.0 km/h
Inj. Quantity: 9.3 mg/str
Voltage: 14.29 V
Pressure: 291.1 bar
Temperature: 19.8°C
001379 - System Voltage
P0563 - 000 - Too High - Intermittent
Freeze Frame:
Fault Status: 00110000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 224856 km
Time Indication: 0
Date: 2020.06.24
Time: 08:20:48

Freeze Frame:
RPM: 2268 /min
Torque: 343.2 Nm
Speed: 20.2 km/h
Duty Cycle: 40.8 %
Voltage: 17.18 V
Bin. Bits: 00001000
Temperature: 45.9°C
004611 - Fuel Injector for Cylinder 3 (N32)
P1203 - 002 - Electrical Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 224857 km
Time Indication: 0
Date: 2020.06.24
Time: 09:58:29

Freeze Frame:
RPM: 798 /min
Torque: 124.8 Nm
Speed: 1.1 km/h
Inj. Quantity: 11.5 mg/str
Voltage: 14.14 V
Pressure: 284.0 bar
Temperature: 32.4°C
004610 - Fuel Injector for Cylinder 2 (N31)
P1202 - 002 - Electrical Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 224857 km
Time Indication: 0
Date: 2020.06.24
Time: 09:58:40

Freeze Frame:
RPM: 1008 /min
Torque: 132.6 Nm
Speed: 0.0 km/h
Inj. Quantity: 13.7 mg/str
Voltage: 13.68 V
Pressure: 404.7 bar
Temperature: 31.5°C
004609 - Fuel Injector for Cylinder 1 (N30)
P1201 - 002 - Electrical Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 224857 km
Time Indication: 0
Date: 2020.06.24
Time: 09:58:40

Freeze Frame:
RPM: 1008 /min
Torque: 132.6 Nm
Speed: 0.0 km/h
Inj. Quantity: 13.7 mg/str
Voltage: 13.68 V
Pressure: 404.7 bar
Temperature: 31.5°C
000512 - Fuel Injectors
P0200 - 003 - Circuit Malfunction
Freeze Frame:
Fault Status: 01100011
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Torque: 0.0 Nm
Speed: 0.0 km/h
Inj. Quantity: 0.0 mg/str
Voltage: 11.55 V
Pressure: 0.0 bar
Temperature: 36.0°C
005648 - Internal Control Module
P1610 - 006 - Memory Check Sum Error - MIL ON
Freeze Frame:
Fault Status: 11100110
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Torque: 0.0 Nm
Speed: 0.0 km/h
Inj. Quantity: 0.0 mg/str
Voltage: 11.55 V
Time: 0.00 ms
Temperature: 31.5°C


Readiness: 0 0 0 0 0


Any help is appreciated

[andreo]

1.Open the ECU - no damage inside.
- charge the battery, ecu installed back - clear all codes - engine crancks well but no engine start and no new fault codes were stored.
-replaced CR pump and R/H fuel rail ( with the fuel pressure regulator ) feeded the pump with fuel gravitationally - fuel pressure 7 bar initially then 120 and 300 bar in fuel rail while engine crancks /when stop crancking the fuel pressure drops to 0 bar (all fuel goes out from the rail return line )

2. - Need wiring diagrams for the fuel system (fuel tank pump - ecu - relay) AUDI Q7 3.0L V6 TDI ENGINE CODE: BUG .
- Need procedure for removal/installation of the engine
- Need timing procedure for this engine ( not from autodata om if possible).

[eprst]

hello, friend, you need to open the ecu, completely, from the inside you will see the consequences after water gets through the plastic plug

[andreo]

Initially opened the ECU on the back side - all ok.

- after dk member: eprst recomandation - opened the ECU on the top (plastic pug side) and found Water damage - see attached photos.
Conclusion:
1. ECU is damaged.
2. With the ECU damaged was possible to connect with the scan tool clear codes perform all actuation test
3. Symptoms of the defect:
- With ignition on no power to the fuel tank pump relay
- when crancking the engine no signal to the fuel injectors


I will return with the next steps.

[eprst]

Check this contact

[andreo]

Hello again,

1. Measurments performed on the ECU board - continuity from two points as previous post is ok.
2. Next step and probably the best step is to do a cloning job.
- found another ECU from a scrap car (see attached photos)
- the question is the P/N are interchangeable ?
3. Best tool to do this cloning joob is the KTAG?
- to copy the immo data from the eeprom and the flash via BDM from one to other, how about the component protection-the engine will start, will change gears and will run?
thumbnail 11.jpgthumbnail 12.jpgthumbnail 13.jpg

[eprst]

Hi, write full Ktag - and all will be well

[andreo]

Problem solved after ECU replacement

- full Ktag read from damaged ECU and full ktag write to the donor ECU - all went well - used the Optican for Bosch EDC 16 BDM adapter No.101
- engine start ok, car runs fine, changing gears ( see attached photo)
thumbnail (2).jpg
Many thanks to eprst

for providing necessary support !!!

[eprst]

how much did you buy the ECU for?

[andreo]

how much did you buy the ECU for?

Hello my friend,

- I bought the ECU with 340 Euro. ( the seller offer 30 days return if not ok )
- On the market price is between 300 and 400 euros. If i were to buy it from Bucharest the price would ben 400 euros plus delivery for sure.
- In my opinion i made o good job overall - excluding the long time when the car was in unserviceable condition.

Thanks again for help !!!

[andreo]

Hello all,

Attached the Donor ecu - full read and separated Ktag files, maybe it's useful to someone !
-for the ECU P/N se previously posts.

[rq7]

Good day. Iam also having trouble with my 2007 audi q7 BUG engine. The engine will suddenly stop and cut off. Then will start again after a few mins.
I have done scanning, and it showed P1040 005, itermittent circuit malfunction.
All wiring harness were tested for continuity as well as injectors. All seems fine.
Have anyone had this problem? I need help, thank you.

[sendo1998]

hi. a had same problem with my father´s Q7. water damaged ECU. i tried to clean it as much as possible, replace capacitors witch were bad and it hepled, but only for about month. oxidation destroyed layers on PCB so i was forcet to swap ECU. but guys! DO NOT FORGET TO CLEAN DRAIN UNDER THE ECU!!! this drain often gets clogged and water can literally drown the ECU (my case )