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Q7 q7 3.0 tdi wont start please help

bolt123 Jul 14, 2016

  1. bolt123

    bolt123 New Member

    3
    1
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    Hi we have a q7 in at the min with a non start issue. The vehicle cranks just will not fire.

    So far we have found on vcds that there is no fault codes apart from glow plugs 6 open circuit we are however getting no fuel pressure. We are getting a good flow from tank to the pump the belt on the pump is ok.

    The cranking rpm was slow 147 rpm so we have replaced the starter now it's cranking alot better at 250 rpm.

    The pump has been taken off and checked the shaft and the imv for swarf all seems fine. If we have the imv in no fuel will come through however pulling the plug off allows diesel to flow through into the hp pipes. Still no pressure.

    If we unplug the pressure sensor we are getting default 350 bar. We have also connected it to the airline getting about what the compressor is reading (that's while connected to the car)

    I've now blanked the fuel return valve at the end of the fuel Rail which is still hasn't helped.

    My next move is to do a leak test and my worry is ecu failure? Can any shed any light or suggest anything that I should be doing? I'm pritty new on the vcds.

    Kind regards
     
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  3. bolt1234

    bolt1234 New Member

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

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



    Chassis Type: 4L (4L0)

    Scan: 01 02 03 05 07 08 09 0E 15 16 17 18 19 34 37 42 46 47 4F 52

    56 61 62 6D 6F 72 76

    VIN: WAUZZZ4L97D033911 Mileage: 274050km-170286miles

    00-Steering Angle Sensor -- Status: OK 0000

    01-Engine -- Status: Malfunction 0010

    02-Auto Trans -- Status: OK 0000

    03-ABS Brakes -- Status: Malfunction 0010

    05-Acc/Start Auth. -- Status: OK 0000

    07-Control Head -- Status: Malfunction 0010

    08-Auto HVAC -- Status: Malfunction 0010

    09-Cent. Elect. -- Status: OK 0000

    0E-Media Player 1 -- Status: OK 0000

    15-Airbags -- Status: OK 0000

    16-Steering wheel -- Status: OK 0000

    17-Instruments -- Status: OK 0000

    18-Aux. Heat -- Status: OK 0000

    19-CAN Gateway -- Status: OK 0000

    34-Level Control -- Status: OK 0000

    37-Navigation -- Status: OK 0000

    42-Door Elect, Driver -- Status: OK 0000

    46-Central Conv. -- Status: OK 0000

    47-Sound System -- Status: OK 0000

    4F-Centr. Electr. II -- Status: OK 0000

    52-Door Elect, Pass. -- Status: OK 0000

    56-Radio -- Status: OK 0000

    61-Battery Regul. -- Status: OK 0000

    62-Door, Rear Left -- Status: OK 0000

    6D-Trunk Elect. -- Status: OK 0000

    6F-Centr. Conv. II -- Status: OK 0000

    72-Door, Rear Right -- Status: OK 0000

    76-Park Assist -- Status: OK 0000



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

    Address 01: Engine Labels: 059-907-401-ASB.clb

    Part No SW: 4L0 910 401 M HW: 4L0 907 401

    Component: 3.0L V6TDI G001AG 0030

    Revision: --H03--- Serial number:

    Coding: 0011775

    Shop #: WSC 00502 210 91521

    VCID: 2C509C9F8F18905ED1-8078

    1 Fault Found:

    005663 - Glowplug for Cylinder 6 (Q15)

    P161F - 001 - Open Circuit

    Freeze Frame:

    Fault Status: 01100001

    Fault Priority: 0

    Fault Frequency: 1

    Reset counter: 255

    Mileage: 274053 km

    Time Indication: 0

    Date: 2006.03.16

    Time: 09:56:31

    Freeze Frame:

    RPM: 0 /min

    Torque: 0.0 Nm

    Speed: 0.0 km/h

    Duty Cycle: 1.0 %

    Voltage: 11.48 V

    Duty Cycle: 15.0 %

    Temperature: 15.3°C

    Readiness: 0 0 1 1 1

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

    Address 02: Auto Trans Labels: 09D-927-750.lbl

    Part No SW: 09D 927 750 FK HW: 09D 927 750 FK

    Component: AL 750 6A 0940

    Revision: 00H52000 Serial number:

    Coding: 0000504

    Shop #: WSC 31414 790 00001

    VCID: 7CF06CDF3FF8C0DE01-8028

    No fault code found.

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

    Address 03: ABS Brakes Labels: 4L0-910-517-V1.clb

    Part No SW: 4L0 910 517 A HW: 4L0 614 517 A

    Component: ESP ALLRAD MK25E1 0130

    Revision: 00H21001

    Coding: 0038033

    Shop #: WSC 31414 790 00001

    VCID: 2858608F9BE0BC7E35-807C

    1 Fault Found:

    01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30

    000 - -

    Freeze Frame:

    Fault Status: 01100000

    Fault Priority: 2

    Fault Frequency: 1

    Reset counter: 180

    Mileage: 274053 km

    Time Indication: 0

    Date: 2006.03.16

    Time: 10:07:13

    Freeze Frame:

    Count: 128

    Count: 4353

    Count: 297

    Count: 44544



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

    Address 05: Acc/Start Auth. Labels: 4F0-910-852.clb

    Part No SW: 4F0 910 852 HW: 4F0 905 852 B

    Component: FBSAUDIC6 ELV H31 0220

    Revision: 31050601 Serial number: 10601000480461

    Coding: 0000147

    Shop #: WSC 00502 210 91535

    VCID: 63C237A3A2461F2620-8036

    Subsystem 1 - Part No: 4F0 910 131 E

    Component: FBSAUDIC6 EZS H45 0080

    Subsystem 2 - Part No: 4F0 910 220 D

    Component: FBSAUDIC6 IDG H01 0040

    No fault code found.

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

    Address 07: Control Head Labels: 4L0-910-7xx-07-H.lbl

    Part No SW: 4L0 910 731 K HW: 4E0 035 729

    Component: Interfacebox H43 4220

    Revision: 00000000 Serial number: 386GW067515732

    Coding: 0002002

    Shop #: WSC 31414 790 00001

    VCID: 306888EFA330F4BEED-8064

    Subsystem 1 - Part No: 4F0 910 609 E

    Component: Bedienteil MMIC6H02 0050

    Subsystem 2 - Serial number: 00000000220048

    Subsystem 3 - Serial number: 0125.08.050000000100010441ÿ

    Subsystem 4 - Serial number: 010441ÿ

    1 Fault Found:

    00658 - Control Head

    008 - Implausible Signal

    Freeze Frame:

    Fault Status: 01101000

    Fault Priority: 7

    Fault Frequency: 1

    Reset counter: 180

    Mileage: 274053 km

    Time Indication: 0

    Date: 2006.03.16

    Time: 10:07:57

    Freeze Frame:

    Bin. Bits: 100



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

    Address 08: Auto HVAC Labels: None

    Part No SW: 4L0 910 043 HW: 4L0 820 043 E

    Component: KLIMABETAETIGUNGH05 0040

    Revision: 00---008 Serial number: 00000000050068

    Coding: 0001046

    Shop #: WSC 31414 790 00001

    VCID: 61CE3DABB85A0D3632-8034

    3 Faults Found:

    01810 - Actuating Motor for Temperature Flap; Right (V159)

    003 - Mechanical Failure

    Freeze Frame:

    Fault Status: 01100011

    Fault Priority: 3

    Fault Frequency: 1

    Reset counter: 180

    Mileage: 274053 km

    Time Indication: 0

    Date: 2006.03.16

    Time: 10:08:20

    Freeze Frame:

    Voltage: 12.20 V

    Temperature: 18.0°C

    (no units): 193.0

    (no units): 73.0

    Temperature: 18.0°C

    00712 - Right Footwell Flap Positioning Motor (V109)

    003 - Mechanical Failure

    Freeze Frame:

    Fault Status: 01100011

    Fault Priority: 3

    Fault Frequency: 1

    Reset counter: 180

    Mileage: 274053 km

    Time Indication: 0

    Date: 2006.03.16

    Time: 10:08:20

    Freeze Frame:

    Voltage: 12.20 V

    Temperature: 18.0°C

    (no units): 18.0

    (no units): 130.0

    Temperature: 18.0°C

    01809 - Actuating Motor for Temperature Flap; Left (V158)

    003 - Mechanical Failure

    Freeze Frame:

    Fault Status: 01100011

    Fault Priority: 3

    Fault Frequency: 1

    Reset counter: 180

    Mileage: 274053 km

    Time Indication: 0

    Date: 2006.03.16

    Time: 10:08:20

    Freeze Frame:

    Voltage: 12.20 V

    Temperature: 18.0°C

    (no units): 183.0

    (no units): 140.0

    Temperature: 18.0°C



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

    Address 09: Cent. Elect. Labels: 4F0-910-279.lbl

    Part No SW: 4F0 910 279 K HW: 4F0 907 279

    Component: ILM Fahrer H17 0240

    Revision: 00000000 Serial number: 4F0907279

    Coding: 0011101

    Shop #: WSC 31414 790 00001

    VCID: 316E8DEBA83AFDB6E2-8064

    Subsystem 1 - Part No: 4L2 910 113 Labels: 1KX-955-119.CLB

    Component: Wischer AU716 H08 0080

    Coding: 00064792

    Shop #: WSC 31414

    Subsystem 2 - Part No: 4E0 910 557 A Labels: 8K0-955-559.CLB

    Component: REGENLICHTSENSORH13 0090

    Coding: 00150059

    Shop #: WSC 31414

    No fault code found.

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

    Address 0E: Media Player 1 Labels: 4E0-910-111.lbl

    Part No SW: 4L0 910 111 A HW: 4L0 035 111

    Component: CD-Changer H41 0100

    Revision: 00000000 Serial number: AUZ5ZBF3026191

    Shop #: WSC 00000 000 00000

    VCID: 1E344657C9A472CE4F-804A

    No fault code found.

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

    Address 15: Airbags Labels: 4L0-910-655.lbl

    Part No SW: 4L0 910 655 B HW: 4L0 959 655

    Component: 31 AIRBAG AUDI8RH38 0120

    Revision: 05H38000 Serial number: 0037GD06DNNI

    Coding: 0013105

    Shop #: WSC 31414 790 00001

    VCID: 2C509C9F8F18905ED1-8078

    Subsystem 1 - Serial number: 6332QSME124C7739K

    Subsystem 2 - Serial number: 6342QSME10233C131

    Subsystem 3 - Serial number: 6352QSME124D4571E

    Subsystem 4 - Serial number: 6362QSME12544B2DK

    Subsystem 5 - Serial number: 63734SME116E3E5BD

    Subsystem 6 - Serial number: 63834SME11782811V

    No fault code found.

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

    Address 16: Steering wheel Labels: 4F0-910-549.lbl

    Part No SW: 4F0 910 549 HW: 4F0 953 549 A

    Component: Lenksäulenmodul H08 0230

    Revision: 00H08000 Serial number: 90054061900604

    Coding: 0102142

    Shop #: WSC 31414 790 00001

    VCID: 66C42EB751746A0EC7-8032

    Subsystem 1 - Part No: XXXXXXXXXXX

    Component: Lenkradmodul H07 0090

    No fault code found.

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

    Address 17: Instruments Labels: 4L0-910-xxx-17.lbl

    Part No SW: 4F0 910 930 C HW: 4L0 920 980 G

    Component: KOMBIINSTR. M73 H17 0110

    Revision: 00300000 Serial number: 5HJ30XM76

    Coding: 2593443

    Shop #: WSC 80093 222 71269

    VCID: 234277A3E2C65F2660-8076

    No fault code found.

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

    Address 18: Aux. Heat Labels: None

    Part No SW: 4L0 910 105 HW: 4L0 815 071 C

    Component: Heizgeraet H07 0060

    Revision: 0000000E Serial number: 00000009011043

    Coding: 0000002

    Shop #: WSC 31414 790 00001

    VCID: 60C838AFB350043E3D-8034

    No fault code found.

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

    Address 19: CAN Gateway Labels: 4L0-910-468.lbl

    Part No SW: 4L0 910 468 HW: 4L0 907 468

    Component: J533__Gateway H06 0040

    Revision: 00H06000 Serial number: 0900B067178099

    Coding: F55BBE5F302202

    Shop #: WSC 00502 210 91521

    VCID: 6CD05C9F4F98505E91-8038

    No fault code found.

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

    Address 34: Level Control Labels: None

    Part No SW: 4L0 910 553 B HW: 4L0 907 553

    Component: LUFTFDR.-CDC H03 7550

    Revision: --H03001 Serial number: 15.1528-0095.2

    Coding: 0015510

    Shop #: WSC 31414 790 00001

    VCID: 295E658B80EA85762A-807C

    No fault code found.

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

    Address 37: Navigation Labels: 4E0-910-88x-37.lbl

    Part No SW: 4E0 910 887 Q HW: 4E0 919 887 D

    Component: MNS ECE H48 0850

    Revision: 00000000 Serial number: 399GV067530424

    Shop #: WSC 31414 790 00001

    VCID: 3B72AFC37A7607E648-806E

    No fault code found.

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

    Address 42: Door Elect, Driver Labels: 4L0-910-793-42.lbl

    Part No SW: 4L0 910 793 B HW: 4L0 959 793 B

    Component: TSG FA H12 0130

    Revision: 00000000 Serial number: ˆy


    Coding: 0002651

    Shop #: WSC 31414 790 00001

    VCID: 2F6A8B93BE0EEB46F4-807A

    No fault code found.

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

    Address 46: Central Conv. Labels: 4L0-910-289.lbl

    Part No SW: 4L0 910 289 F HW: 4L0 907 289 C

    Component: Komfortgeraet H08 0060

    Revision: 0060 --- Serial number: 01903971940000

    Coding: 7348475

    Shop #: WSC 80093 222 69422

    VCID: 336287E35226CFA690-8066

    Subsystem 1 - Part No: 1K0 951 605 C

    Component: LIN BACKUP HORN H03 1301

    Subsystem 2 - Part No: 4F0 910 177

    Component: Innenraumueberw.H01 0020

    No fault code found.

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

    Address 47: Sound System Labels: Redir Fail!

    Part No SW: 4L0 910 223 B HW: 4L0 035 223

    Component: DSP-AU716 H20 0100

    Revision: 11S00001 Serial number: 01607060321714

    Coding: 0000003

    Shop #: WSC 31414 790 00001

    VCID: 234277A3E2C65F2660-8076

    No fault code found.

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

    Address 4F: Centr. Electr. II Labels: 4F0-910-280.lbl

    Part No SW: 4F0 910 280 HW: 4F0 907 280 E

    Component: ILM Beifahrer H10 0080

    Revision: Serial number: 00000000002404

    Coding: 0011101

    Shop #: WSC 31414 790 00001

    VCID: 5EB40657892432CE0F-800A

    No fault code found.

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

    Address 52: Door Elect, Pass. Labels: 4L0-910-793-52.lbl

    Part No SW: 4L0 910 793 B HW: 4L0 959 792 B

    Component: TSG BF H12 0130

    Revision: 00000000 Serial number: 3 ‚

    Coding: 0002651

    Shop #: WSC 31414 790 00001

    VCID: 2F6A8B93BE0EEB46F4-807A

    No fault code found.

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

    Address 56: Radio Labels: 4E0-910-541.lbl

    Part No SW: 4E0 910 541 Q HW: 4E0 035 541 P

    Component: TUNER EU/US/RDW H42 0620

    Revision: 00000000 Serial number: 388G4067539883

    Coding: 0000001

    Shop #: WSC 31414 790 00001

    VCID: 2E549697B904E24EFF-807A

    No fault code found.

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

    Address 61: Battery Regul. Labels: 4F0-910-181.lbl

    Part No SW: 4L0 910 181 HW: 4L0 915 181

    Component: J0644 BEM H12 0530

    Revision: -------- Serial number: 00000000030231

    Shop #: WSC 31414 790 00001

    VCID: 64C034BFA748181ED9-8030

    Subsystem 1 - Part No: 4F0 915 105 D

    Component: von VA0 2607171156

    Coding: 344630393135313035442056413032363037313731313536

    Shop #: WSC 31414 790 00001

    No fault code found.

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

    Address 62: Door, Rear Left Labels: 4L0-910-795.lbl

    Part No SW: 4L0 910 795 B HW: 4L0 959 795 B

    Component: TSG HL H21 0050

    Coding: 0002058

    Shop #: WSC 31414 790 00001

    VCID: 316E8DEBA83AFDB6E2-8064

    No fault code found.

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

    Address 6D: Trunk Elect. Labels: None

    Part No SW: 4L0 910 945 HW: 4L0 827 851 A

    Component: ValeoHeckdeckel H20 0280

    Revision: --H20001 Serial number: E5030000B

    Shop #: WSC 98765 666 38354

    VCID: 6CD05C9F4F98505E91-8038

    Subsystem 1 - Part No: 4L0 910 946

    Component: ValeoHeckdeckel H20 0280

    Subsystem 2 - Serial number: E5030100B

    Subsystem 3 - Serial number: RD25.07.06--H20001000B0200ÿ


    Subsystem 4 - Serial number: 0B0200ÿ

    No fault code found.

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

    Address 6F: Centr. Conv. II Labels: 4L0-910-290.lbl

    Part No SW: 4L0 910 290 HW: 4L0 907 290

    Component: ILM HINTEN 2 H05 0060

    Revision: AAH05061 Serial number: 001845038-----

    Coding: 0000001

    Shop #: WSC 31414 790 00001

    VCID: 65C629BBAC726116CE-8030

    No fault code found.

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

    Address 72: Door, Rear Right Labels: 4L0-910-795.lbl

    Part No SW: 4L0 910 795 B HW: 4L0 959 794 B

    Component: TSG HR H21 0050

    Coding: 0002058

    Shop #: WSC 31414 790 00001

    VCID: 316E8DEBA83AFDB6E2-8064

    No fault code found.

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

    Address 76: Park Assist Labels: 4Fx-910-283.lbl

    Part No SW: 4F0 910 283 G HW: 4F0 919 283 G

    Component: Parkhilfe 8-Kan H12 0060

    Revision: 00H12000 Serial number: 06320620100569

    Coding: 0201146

    Shop #: WSC 31414 790 00001

    VCID: 2858608F9BE0BC7E35-807C

    No fault code found.

    End-------------------------(Elapsed Time: 03:18)--------------------------
     
  4. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User Audi A4 Audi Avant Owner Group quattro TDi

    6,530
    3,090
    113
  5. bolt1234

    bolt1234 New Member

    2
    0
    1
    Hi thanks for the reply im just trying not to waste to much money as it has now had a battery and starter. It all seems to be down to the metering valve n290 when connected the vehicle is not allowing any fuel through and from what I gather it will only allow a small quantity through when disconnected. I don't think we have an immobiliser issue as ive read the car will start and shut off with a symbol on the dash.

    The early events on this vehicle was that it did crank a fair while before starting this was put down (by the owner) to the battery not being full, However a new battery didn't cure it but a new starter has definitely made a big difference the car sounds a lot more lively but still failing to start
     
  6. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User Audi A4 Audi Avant Owner Group quattro TDi

    6,530
    3,090
    113
    Yes if there is an immo problem cars usually start for a few seconds before cutting out an will raise a CEL with an associated code.
     
  7. bolt123

    bolt123 New Member

    3
    1
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    Yer I'm sort of moving away from the immobiliser. It's this fuel problem where nothing will come through if the metering valve (n290) is connected and does when you unplug it. I've read that when unplugged it will allow a small amount of fuel through. Not sure weather it is enough to start it though. I wonder if there's a fuel cut off switch that be triggered.
     
  8. adamss24

    adamss24 Well-Known Member

    4,584
    411
    83
    Ecu failure on the q7 is common due to where the ecu is positioned. Had one in a month ago and it has blown the ecu however I had no contact with it on the scanner...
     
  9. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User Audi A4 Audi Avant Owner Group quattro TDi

    6,530
    3,090
    113
  10. bolt123

    bolt123 New Member

    3
    1
    1
    Yes pump has been off and valve out I've also made a blanking plate to totally do away with it hoping to get something.
    The thing that is bugging me is that it's showing no fuel pressure but there is no fault code. Now Inless it's stopping the fuel pressure itself so knows that it isn't a fault as it's doing it
     
    Skids1 likes this.
  11. Skids1

    Skids1 New Member

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    1
    Hi did you get the problem sorted as my Q7 is doing the same thing?
     
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  13. Skids1

    Skids1 New Member

    2
    0
    1
    Hi did you get the problem sorted? My Q7 is doing the same with no faults
     
  14. Al1609

    Al1609 New Member

    1
    0
    1
    Hello,
    I have the same problem : won't start

    Starter turn but engine won't start
    I have no pressure after HP pump!
    No fault find with VCDS.
    Engine bks 2007.

    If you have any information or if you have find the problem I'am interested!
     
  15. i3oricua

    i3oricua Active Member Team Brill Red Audi A4 Saloon

    249
    91
    28
    Reviving this thread because I’m having this problem. Anyone get their Q7 to work? I’ve changed glow plugs, fue filter, and crank position sensor. I’m running out of ideas and money.


    Sent from my iPhone using Tapatalk
     
  16. Mokesh Singh

    Mokesh Singh New Member

    3
    1
    3
    I’m in the same position - the diesel engineers here have confirmed the hpfp is pumping within spec when they bench test it but on the car, no fuel pushes out on the other end... there must be a sensor or trigger somewhere that tells the pump to work???
     
  17. i3oricua

    i3oricua Active Member Team Brill Red Audi A4 Saloon

    249
    91
    28
    Mine ended up being a coolant temp sensor that was messing my Q7 up. Not fuel related but could work I guess.


    Sent from my iPhone using Tapatalk
     
  18. Mokesh Singh

    Mokesh Singh New Member

    3
    1
    3
    I have seen some posts saying that the coolant sensor could be it - I will have to pull mine out and get a new one and keep my fingers crossed!
    I do have VCDS but I have no clue as to which measuring block to check for my 3.0 TDI (BUG engine) for the coolant temp
    There is however a temp reading that shows over 500 degrees celcius (so I may as well change the sensors and swing it)
     
  19. Mokesh Singh

    Mokesh Singh New Member

    3
    1
    3
    So I got the coolant sensor today - just shy of R900 (South African Rands) including the o-ring and spring clip and I’ll drop it in soon - maybe tomorrow morning if the weather permits. Hopefully I have the same luck as you :)
     
    i3oricua likes this.

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