Q7 e-tron hauled away: Drivetrain error

[FortyPlus]

Hi
My Q7 e-tron was hauled away on a truck today back to Audi. Did about 400Km faultlessly on Saturday, got home, parked up & plugged in. Got in this morning it gave a drive-train error, and advised me to stop and not exceed 2150RPM.
Considering nothing was moving, and no engine running, this was strange.
Audi Assist hauled off the car, but before it went I did a quick scan. The 2 relevant parts are below. So it looks to be something to do with electric motor controller?
Really strange as the car completed the last Km of the trip home (250Km) on EV, and everything was perfect.
In fairness the local Audi garage were helpful, but busy, so it might be a few days before I get a diagnosis. Needless to say there are very few e-trons about

But somehow this feels like a glitch. I would have been tempted to clear the messages and see what happened, but that might have been difficult to explain.
I have 45,000 Km covered and it's been totally fault free, not a hint of an issue. A bit worrying when something potentially leaves you stranded.



Address 01: Engine (J623-CVZA) Labels: Redir Fail!
Part No SW: 4M0 907 401 A HW: 059 907 309 F
Component: 3.0TDI MD1 H21 0009
Revision: C7H21---
Coding: 2A2A4032056E050334082B00000000000000000000000000
Shop #: WSC 55802 001 1048576
ASAM Dataset: EV_ECM30TDI0114M0907401A 001017
ROD: EV_ECM30TDI0114M0907401A.rod
VCID: 270BF82B4F69037FFF7-8072


Active accelerator pedal:
Subsystem 1 - Part No SW: 4M2 723 523 HW: 4M2 723 523
Component: J1115 - FFP H03 0007
Serial number: 123456789ABCDEFGHIJK


Clutch Control Unit Sub:
Subsystem 2 - Part No SW: 0D7 142 057 D HW: 0D7 142 057 D
Component: J1128 CCU H03 0031


1 Fault Found:
24512 - Control Module for Electric Drive Power Output
U0411 00 [167] - Implausble Message
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 45177 km
Date: 2019.04.23
Time: 09:19:33


Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 13 °C
Intake air temperature: 13 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 11.400 V
Unlearning counter according OBD: 40
Engine status: COENG_READY
Engine status-Test_Program_Co Eng st COMPU VERB UBYTE: 1


Readiness: 0 0 0 0 0


Address 51: Electric Drive (J841) Labels: None
Part No SW: 4M1 907 080 A HW: 4M1 907 080 A
Component: A73P7827R6000 H03 0016
Revision: --H03---
Coding: 01000000000000000000
Shop #: WSC 31414 790 00001
ASAM Dataset: EV_DMCM08530214M1907080A 001010
ROD: EV_DMCM08530214M2907080.rod
VCID: 2B03041B5381271F1BF-807E


1 Fault Found:
29309 - Internal Control Module
P0606 00 [039] - Processor Fault
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 6
Mileage: 45177 km
Date: 2019.04.23
Time: 09:19:32


Unlearning counter according OBD: 40
SMF 3 state [31..28] and safety error logical value field for FailSptMon [27..0]-u32StateSftyErrAct3Mon: 1054340479
SMF SPT states common: inverter: DCDC [4bit each]-u16StateSptCmnInvtDcdcMon: 2306
SMF Common SPT subtest step [4bit each]-u16StepSptCmnMon: 31984
SMF Inverter SPT subtest step [4bit each]-u16StepSptInvtMon: 3873
SMF DCDC SPT subtest step [4bit each]-u16StepSptDcdcMon: 43232
SMF Inverter SPT subtest step extended [4bit each]-u8StepSptInvtExtdMon: 134
SMF DCDC SPT subtest step extended [4bit each]-u8StepSptDcdcExtdMon: 62

[Crasher]

Arn’t These going to be fun when they are 10 years old and driven by the school must milf who can’t afford a light bulb at £200 (soright, me new boyfriend will fii itttt) never mind a new high voltage battery at £11k, plus VAT, installation and coding..... glad I will be retired by then and restoring old Land Rovers in a barn somewhere in Wales...

[Crasher]

You may not like it but it is what happens on my side of the counter, old Q7's are a nightmare, most bought by people who want an image they can't afford.

[FortyPlus]

You may not like it but it is what happens on my side of the counter, old Q7's are a nightmare, most bought by people who want an image they can't afford.

I don't see what these comments do to contribute to a forum discussion. I seem to recall these views are previously aired.

Cars will most likely end up electric, whether we like it or not, and there are many issues surrounding that, not for discussion here.

I posted the information to potentially be of benefit to other owners that may encounter something similar, no other reason.

Regards to all :-)

[inchshort]

I went to test drive one from Audiband was told they (Q7 etron) are not made anymore.

they trued to push me into a fully electric what looked like A6 Allroad.

Audi are moving towards fully electric instead of hybrid.

[kpytou]

Hi
My Q7 e-tron was hauled away on a truck today back to Audi. Did about 400Km faultlessly on Saturday, got home, parked up & plugged in. Got in this morning it gave a drive-train error, and advised me to stop and not exceed 2150RPM.
Considering nothing was moving, and no engine running, this was strange.
Audi Assist hauled off the car, but before it went I did a quick scan. The 2 relevant parts are below. So it looks to be something to do with electric motor controller?
Really strange as the car completed the last Km of the trip home (250Km) on EV, and everything was perfect.
In fairness the local Audi garage were helpful, but busy, so it might be a few days before I get a diagnosis. Needless to say there are very few e-trons about

But somehow this feels like a glitch. I would have been tempted to clear the messages and see what happened, but that might have been difficult to explain.
I have 45,000 Km covered and it's been totally fault free, not a hint of an issue. A bit worrying when something potentially leaves you stranded.



Address 01: Engine (J623-CVZA) Labels: Redir Fail!
Part No SW: 4M0 907 401 A HW: 059 907 309 F
Component: 3.0TDI MD1 H21 0009
Revision: C7H21---
Coding: 2A2A4032056E050334082B00000000000000000000000000
Shop #: WSC 55802 001 1048576
ASAM Dataset: EV_ECM30TDI0114M0907401A 001017
ROD: EV_ECM30TDI0114M0907401A.rod
VCID: 270BF82B4F69037FFF7-8072


Active accelerator pedal:
Subsystem 1 - Part No SW: 4M2 723 523 HW: 4M2 723 523
Component: J1115 - FFP H03 0007
Serial number: 123456789ABCDEFGHIJK


Clutch Control Unit Sub:
Subsystem 2 - Part No SW: 0D7 142 057 D HW: 0D7 142 057 D
Component: J1128 CCU H03 0031


1 Fault Found:
24512 - Control Module for Electric Drive Power Output
U0411 00 [167] - Implausble Message
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 45177 km
Date: 2019.04.23
Time: 09:19:33


Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 13 °C
Intake air temperature: 13 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 11.400 V
Unlearning counter according OBD: 40
Engine status: COENG_READY
Engine status-Test_Program_Co Eng st COMPU VERB UBYTE: 1


Readiness: 0 0 0 0 0


Address 51: Electric Drive (J841) Labels: None
Part No SW: 4M1 907 080 A HW: 4M1 907 080 A
Component: A73P7827R6000 H03 0016
Revision: --H03---
Coding: 01000000000000000000
Shop #: WSC 31414 790 00001
ASAM Dataset: EV_DMCM08530214M1907080A 001010
ROD: EV_DMCM08530214M2907080.rod
VCID: 2B03041B5381271F1BF-807E


1 Fault Found:
29309 - Internal Control Module
P0606 00 [039] - Processor Fault
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 6
Mileage: 45177 km
Date: 2019.04.23
Time: 09:19:32


Unlearning counter according OBD: 40
SMF 3 state [31..28] and safety error logical value field for FailSptMon [27..0]-u32StateSftyErrAct3Mon: 1054340479
SMF SPT states common: inverter: DCDC [4bit each]-u16StateSptCmnInvtDcdcMon: 2306
SMF Common SPT subtest step [4bit each]-u16StepSptCmnMon: 31984
SMF Inverter SPT subtest step [4bit each]-u16StepSptInvtMon: 3873
SMF DCDC SPT subtest step [4bit each]-u16StepSptDcdcMon: 43232
SMF Inverter SPT subtest step extended [4bit each]-u8StepSptInvtExtdMon: 134
SMF DCDC SPT subtest step extended [4bit each]-u8StepSptDcdcExtdMon: 62

I faced the same problem with block 4m1907080b, I solved the problem by re-balling the processor TC277TP. The state of the processor contacts due to soldering tin falls off within 3-5 years ago... ****ing factory soldering of Continental, cost of a new unit 15000$. I have Jtag pinout on the board of this unit.

[FortyPlus]

I faced the same problem with block 4m1907080b, I solved the problem by re-balling the processor TC277TP. The state of the processor contacts due to soldering tin falls off within 3-5 years ago... ****ing factory soldering of Continental, cost of a new unit 15000$. I have Jtag pinout on the board of this unit.

That's really interesting! Mine was under warranty at the time, and fully resolved by Audi by module replacement. I always felt it was probably a €20 component or some other basic electronic error that could have a low cost repair. If it happened again I would take a different route for resolution :-).
May I ask how you approached this; do you have personal expertise, or did you find a specalist repair company.
Thanks

[VAG-Abound]

Far better to get it done by a proper rig if possible, but my son was quite amazed when I fixed his PC graphics card by stripping it of all plastic parts and popping it in the oven at 220C with a few coins on top of the GPU. It was fine for a couple of years afterwards. I've previously fixed XBoxes with a hot air gun and aluminum foil masks to protect other parts as well.

[Crasher]

I used to have to use my Playstation 1 upside down so the heat could escape, then we got burgled so I got a new one on the insurance...

[kpytou]

That's really interesting! Mine was under warranty at the time, and fully resolved by Audi by module replacement. I always felt it was probably a €20 component or some other basic electronic error that could have a low cost repair. If it happened again I would take a different route for resolution :-).
May I ask how you approached this; do you have personal expertise, or did you find a specalist repair company.
Thanks

I spent 3 months studying this system, including electrical circuits with Elsa. It all started with the BJB of the 4M0915253C unit, initially the 300 amp fuse was killed. Brand New PEC 300A DC450V BC6000A New Energy High Voltage Automotive Fuse | eBay look this. Error code: U059B00 in J840 address word 008C.