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Thread: 2012 Passat 2.0 TDI sport will not start or turn over

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  1. 2012 Passat 2.0 TDI sport will not start or turn over 
    #1
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    Hi

    Looking for some advice/help

    About a week ago my Passat had issues in starting. It would start but with low revs only and the engine management light on, second handbrake light on amber with line through it and warning that ESC was not operating. engine cut out after about 5secs.

    On the third attempt of trying to start it started normally without any errors on display. took it for a test drive and all appeared to be ok.

    Couple of days later went to use car and the display comes on when you insert the key and the above warnings appear on display. when you push the start button to fire up engine display blanks out and nothing happens except after about 5 seconds the radiator fans come on full blast and will not stop until the key is removed.

    on trying to test with code reader the first one could not communicate but an alternative one gave the following information

    ABS:
    01314 - Engine Control Module (ECM)

    Parking brake:
    01314 - Engine Control Module (ECM)
    03200 - Button for Electrical Parking Brake (E538)

    Power steering:
    01314 - Engine Control Module (ECM)
    Instrument cluster:
    12648448

    Immobilizer:
    01176 - Key Faulty

    Central electronics:
    00526 - Brake Light Switch (F)
    00907 - Intervention load Management
    01314 - Engine Control Module (ECM)
    03678 - Co-ordinator Start-Stop Function

    Driver's door:
    68108

    Front passenger's door:
    68108

    Heater & air conditioning:
    13701376

    CAN network gateway:
    01314 - Engine Control Module (ECM)

    Media player:
    01314 - Engine Control Module (ECM)

    Our local mechanic suggested we try battery which we replaced with a new AGM battery but no difference.

    He came to house and has checked all fuses and relays and also checked for the 3 earths and 3 lives at ecu which are present. also checked two inputs for 2.5v plus and minus square wave which are also present.

    he is sure that ECU is at fault

    1 - is there anything else that we have missed

    2 - can the ECU be repaired and can you suggest an agent for this or is it VW only for this repair.

    Geoff



     
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  2. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
    #2
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    Get a scan done with VCDS, if you can locate someone with it, those codes look like they are from a generic reader. What voltage do you have at the battery terminals when the car is off and then when engine running? those codes look related to low voltage at first glance and not all of them relating to engine ECU, there are codes from other modules there, plus the fact your dash warning lights cleared once it was running. BBS reman do ECU's if you're sure sure though
     
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  3. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
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    Hi

    Codes given are from generic reader and we originally thought it was battery so the new one was put on but not difference. Cannot give volts when started as it will not start or even turn over but the original battery charged is 12.7v and the replacement battery is now at 12v.

    warning lights are there now when ignition switched on but when you press start button the display goes off as if you have removed key from slot.

    Geoff
     
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  4. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
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    Sorry I can't be much more help, other than thinking it is still voltage related, can you try carefully connecting to another vehicle with jump leads, as your original and new battery might be showing good voltage under no load but dipping when ignition is turned on.
     
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  5. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
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    Hi

    Thanks for help. e did try a jump start early on but no joy. battery voltage is static when we try to start at 12v or 12.7 which ever one is fitted. Just going to have to bit the bullet and send off the ecu for testing.

    Thank you again
     
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  6. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
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    hi, something similar with my passat - 2013 2.0tdi 174 - was driving perfectly fine then all of a sudden loss of power, followed 10 seconds later by the car dying. since then it wont start, and has a ESC fault. ive tried jumping it, it wont jump, ive charged the battery for 16 hours, with a stable voltage of 12.5v prior to an attempted start. when i put the fob in and attempt a start it sounds as if the car doesn't even attempt to start but the radiator fan comes on.

    any ideas?
     
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  7. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
    #7
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    Quote Originally Posted by simpz7 View Post
    hi, something similar with my passat - 2013 2.0tdi 174 - was driving perfectly fine then all of a sudden loss of power, followed 10 seconds later by the car dying. since then it wont start, and has a ESC fault. ive tried jumping it, it wont jump, ive charged the battery for 16 hours, with a stable voltage of 12.5v prior to an attempted start. when i put the fob in and attempt a start it sounds as if the car doesn't even attempt to start but the radiator fan comes on.

    any ideas?
    Did you ever get to the bottom of this because I have the exact same issue!
     
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  8. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
    #8
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    Quote Originally Posted by Pandaman5005 View Post
    Did you ever get to the bottom of this because I have the exact same issue!
    Not been active for 2 years...
    2013 B7 Passat BlueMotion Sport Estate 2.0 TDi 177PS (CFGC), 6 speed Manual, Metallic Night Blue, Fontana alloys, Start/Stop, RNS-510 (HW H09, SW 5238 V13 maps, 8316) Nav DAB, ACC, XDS, TPM, Westfalia Tow bar, Rear View camera, Keyless Entry, Easy Open/close Electric Tailgate, Park Assist, Electric Parking Brake, DRL's, Amb light, Zebrano wood, Tinted Glass, mud flaps, 61K. Cheat emission software. Nextbase 402G iN-CAR CAM.
     
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  9. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
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    Quote Originally Posted by Pandaman5005 View Post
    Did you ever get to the bottom of this because I have the exact same issue!
    Hi, did anyone solved this problem please. I have the same problem with my passat b7 2.0tdi. Any help please.
     
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  10. Re: 2012 Passat 2.0 TDI sport will not start or turn over 
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    Hi, yes I did, the ECU failed and was not recoverable. In the end I had to buy an ECU set from eBay and change about 4 bits of kit on the car.
     
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