Car cutting out when going over bumps - sportback 1.9tdi

[tates1979]

As above-

My 05 sportback loses power/cuts out (has stalled twice) occasionally- the common denominator seems to be when I go over bumps/pothole infused roads. Doesn't happen every time, but a speedbump/bump/pothole is always the catalyst for it!

Any thoughts? Have scanned via vcds but no fault codes relating to the prob (one for a electric window, one for aircon I already knew about).

Any thoughts??

 

[tates1979]

Bumpage!

 

[mike foster]

I see you have bumped the page mate - I would suggest that the lack of replies are due to nobody having had the same problem

I have certainly not heard of it !

Only thing I can think of is a loose connection somewhere, possibly in the injector loom or the fuel pump, causing an intermittent fault.

Hope you get it sorted

 

[tates1979]

Cheers Mike - No joy checking connections - its still the same.

I scanned with VCDS - apart from probs with aircon / lights i knew about - its throwing up a 01314 code regarding the engine control module - might this be affecting it?

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 1K0
Scan: 01 03 08 09 15 16 17 19 25 42 44 46 47 52 56 62 72 7D


00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Sporadic communication error 1000
03-ABS Brakes -- Status: Malfunction 0010
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door,Rear Left -- Status: Malfunction 0010
72-Door, Rear Right -- Status: OK 0000
7D-Aux. Heat -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine Labels: 03G-906-016-BKC.lbl
Part No SW: 03G 906 016 CC HW: 028 101 183 2
Component: R4 1,9L EDC 0000SG 6231
Revision: 12345678 Serial number: AUX7Z0D9FND0BK
Coding: 0000071
Shop #: WSC 06314 000 00000

No fault code found.
Readiness: 0 0 0 0 0

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1K0-907-379-MK70.lbl
Part No: 1K0 907 379 N
Component: ASR FRONT MK70 0103
Coding: 0017025
Shop #: WSC 06435 000 00000

1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8P0-820-043.lbl
Part No SW: 8P0 820 043 D HW: 8P0 820 043 D
Component: KlimavollautomatH12 0150
Revision: 105846 Serial number: 8P0820043D
Shop #: WSC 06314 000 00000

1 Fault Found:
00819 - High Pressure Sensor (G65)
009 - Open or Short to Ground
Freeze Frame:
Fault Status: 01101001
Fault Priority: 3
Fault Frequency: 198
Reset counter: 119
Mileage: 226825 km
Time Indication: 0
Date: 2010.09.18
Time: 21:59:02

Freeze Frame:
Temperature: 4.5°C
Voltage: 12.10 V
RPM: 0 /min
Load: 0.0 %
Load: 9.0 %


-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8P0-907-279-23-H.lbl
Part No SW: 8P0 907 279 C HW: 8P0 907 279 C
Component: Bordnetz-SG H34 0301
Revision: 00H34000 Serial number: 00000001126281
Coding: 01884F02B214100000160000160000000000FE0F5C
Shop #: WSC 00000 000 00000

Part No: 8P2 955 119 B
Component: Wischer AU350 H01 0130
Coding: 00062736
Shop #: WSC 00000

3 Faults Found:
02195 - Dimmer Switch Instrument Panel & Switch Lighting (E20)
009 - Open or Short to Ground
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
00188 - Control Circuit 1; Relay for Supply Voltage Terminal 50
010 - Open or Short to Plus - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8P0-959-655-94.lbl
Part No SW: 8P0 959 655 C HW: 8P0 959 655 C
Component: Airbag 9.41 H10 2620
Revision: 91H10262 Serial number: 00362000RVWF
Coding: 0033622
Shop #: WSC 06314 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 1K0-953-549.lbl
Part No SW: 1K0 953 549 HW: 1K0 953 549
Component: Lenksäulenmodul 012 0030
Coding: 0000002
Shop #: WSC 06314 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8P0-920-xxx-17-MY7.lbl
Part No SW: 8P0 920 900 F HW: 8P0 920 900 F
Component: KOMBIINSTR. VDO H72 0210
Revision: D03 Serial number: 1249DD03013973
Coding: 0004448
Shop #: WSC 00411 210 03906

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 1K0-907-530.lbl
Part No SW: 1K0 907 530 D HW: 1K0 907 951
Component: Gateway H08 0100
Revision: 08 Serial number: 25001049270233
Coding: 3D3F0B42072103
Shop #: WSC 06314 000 00000

2 Faults Found:
00469 - Infotainment Databus in Single Wire Operation
011 - Open Circuit
Freeze Frame:
Fault Status: 01101011
Fault Priority: 3
Fault Frequency: 3
Reset counter: 119
Mileage: 232699 km
Time Indication: 0
Date: 2011.02.11
Time: 17:20:30

01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 2
Reset counter: 159
Mileage: 233477 km
Time Indication: 0
Date: 2011.02.28
Time: 18:53:32


-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 1K0-920-xxx-25.lbl
Part No SW: 8P0 920 900 F HW: 8P0 920 900 F
Component: KOMBIINSTR. VDO H72 0210
Revision: D03 Serial number: AUX7Z0D9FND0BK
Shop #: WSC 00000 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver Labels: 8P0-959-801-MIN.lbl
Part No: 8P0 959 801 E
Component: Tuersteuerger. H10 0030
Coding: 0000016
Shop #: WSC 06314 000 00000

1 Fault Found:
00912 - Window Regulator Switch; Front Left (E40)
008 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1Kx-909-14x.lbl
Part No: 1K2 909 144 G
Component: EPS_ZFLS Kl.9 1301
Shop #: WSC 00000 000 00000

1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Mileage: 3440 km
Temperature: 20.0°C
Voltage: 12.50 V
Voltage: 12.30 V


-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8P0-959-433.lbl
Part No: 8P0 959 433 E
Component: KSG H04 0050
Coding: 188000186D088505489F016000
Shop #: WSC 06314 000 00000

Component: Sounder n.mounted

Component: NGS n.mounted

Component: IRUE n.mounted

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System Labels: 8Px-035-382.lbl
Part No SW: 8P4 035 382 HW: 8P4 035 382
Component: AB2 SUBWOOFERBOXH02 0160
Revision: 00001 Serial number: 10000001189590
Shop #: WSC 00000 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. Labels: 8P0-959-802-MIN.lbl
Part No: 8P0 959 802 E
Component: Tuersteuerger. H10 0030
Coding: 0000016
Shop #: WSC 06314 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: Redir Fail!
Part No SW: 8P0 035 186 C HW: 8P0 035 186 C
Component: concert II EU H51 0100
Revision: 01S Serial number: AUZ2Z3D1535597
Coding: 0001001
Shop #: WSC 06435 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door,Rear Left Labels: 8P4-959-801.lbl
Part No: 8P4 959 801 B
Component: Tuer-SG H10 0010
Coding: 0000144
Shop #: WSC 06314 000 00000

1 Fault Found:
00934 - Electric Window Motor; Rear Left (V26)
005 - No or Incorrect Basic Setting / Adaptation - Intermittent

-------------------------------------------------------------------------------
Address 72: Door, Rear Right Labels: 8P4-959-802.lbl
Part No: 8P4 959 802 B
Component: Tuer-SG H10 0010
Coding: 0000144
Shop #: WSC 06314 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 7D: Aux. Heat Labels: 1K0-963-235.lbl
Part No SW: 1K0 963 235 E HW: 1K0 963 235 E
Component: PTC-Element 0404
Revision: 00800000 Serial number:
Shop #: WSC 00000 000 00000

No fault code found.

End ---------------------------------------------------------------------

 

[mike foster]

This might help :- 01314 - Ross-Tech Wiki

 

[tates1979]

Cheers Mike

So there seems to be an issue with the ECU judging by the Ross-Tech site, connection problem (either internal or external).

The other code 00188 appears to be related to the ignition - if I'm right, if this is dodgy it'll kill the power, yes?

I'll get my brother in law to have a look at the car at the weekend - I've heard you need a heatgun to remove the ECU shroud!

Failing that, can I check terminal 50 - is that a relay switch?

 

[mike foster]

Not sure about terminal 50 mate - sorry

Just noticed that at address #44 mileage is shown as 3440km

Has something been replaced to your knowledge ?

 

[tates1979]

I replaced the battery around the start of December - would this have caused it?
I also slid into a kerb around this time, knocked the wheel a bit but no damage - would this have affected the ABS signal problem

 

[tates1979]

Cleared the DTCs - haven't popped up since yesterday anyways.
Totally stuck. The car only judders and stalls if I have my foot on the throttle over the bumps, if I coast over them using the clutch in then it continues over them as it normally would.

Does this narrow it down any?

Cheers for the help guys - at a total loss here!

 

[tates1979]

Right, went a week with the car as normal. Quit
Stalling just as my mechanic took a look at it - sods law and couldn't recreate it!
He checked over all connections and everything seemed ok.
Until today, stalled badly going over bumps and on the dual carraigeway. At one point it stalled pretty badly, with the glowplug light flickering in the dash and a clicking sound coming from behind/under the steering wheel. Then, within a few seconds, it returned to normality again!

Any thoughts on this? Is there anything I could measure with live data via vcds? Is it a relay (have heard there are some below the dash?)

 

[a8 tech back]

50 terminal is the starter cranking feed but shares the same multi plug connection under the engine bay fuses and relay plate as the voltage supply relay for the engine ecu, so you have a small indication your fault may lie there.

You need to establish if the ecu is losing its 30,31 and 15 inputs when it cuts out

You can do this by back probing the ecu and connection a voltmeter or checking the voltage supply with vcds

In both cases you will need to drive around with either connected to monitor but I would simply check all connections on this circuit for loose pins or corrosion

Also don't ignore the can crashing again you can check this in mvb 125 in address 19 amongst others as there's a drop between abs and engine ecu.

The benefit of address 19 shows you all the drive train status with 1 = working and 0= not working but if it flickers between 1 and 0 then you have a contact problem either internally or externally on the highlighted control unit (in your case engine ecu)

Good luck and yes you will need to remove the tamper bolts by applying heat then use mole grips to remove them but not to much heat as your heating the ecu casing (they are a ******)

 

[tates1979]

Cheers A8 tech - will get on it.

Update - the car had a bit of bother starting and the glowplug light was flickering. Scanned and it came up with a fault:

16705 Engine Speed Sensor G28 : Implausible Signal.

According to Ross-Tech this means the sensor is kaput/faulty or the wiring attached to it!

Does this sound like i might have found the solution to this annoying problem??? Hope so!!!

On the offchance, does anyone have the part no for this bad boy (G28 sensor)??


Thanks all for the assistance - hopefully getting near the end!

 

[mike foster]

What's your engine code mate ?

 

[tates1979]

What's your engine code mate ?

BKC.

Thanks a million. Sound like a cure?

 

[mike foster]

Could be the problem but substitution is the only real way of checking I think.

If somebody could confirm that another name (ETKA name) for G28 speed sensor is 'Impulse sensor crankshaft' then the part number is :-

036 906 433 B.

 

[tates1979]

Update on this:

Mike, cheers - that was indeed the part number, got the G28. After getting it, and with the car nigh on impossible to start, it threw a 16706 No Signal code. This was accompanied by serious power loss and revving.

My brother in law went to fit it this weekend, thought it would be a fifteen minute job. Boy, were we wrong!

It was located next to the flywheel, so a lot of stripping out had to be done before getting near to it. Even then, the sensor, approximately 2" in depth, was in some sort of hole that an allen key had to be inserted, blind, into. Even then the allen key had to be worked at an angle due to the shape of sensor but could get no purchase on it!! sensor here: http://images.esellerpro.com/2366/I/437/6/036906433E.JPG

So, to get at it - the gearbox had to come out. Long story short, it's in and the car is driving dandy again - actually better than i can ever remember. Cold starts are really smooth (the car used to jolt when starting) so am happy!

Thanks to everyone for the help!

 

[mike foster]

Thanks for the update mate - glad you got it sorted !