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Thread: HELP! i'm at my wit's end. No throttle response at all. 2001 A4 Audi Avant Quat

  1. #1
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    HELP! i'm at my wit's end. No throttle response at all. 2001 A4 Audi Avant Quat

    I have just swapped transmissions from auto to 5 speed. After reading every forum I could find on the subject, I have not found anyone who has had this problem after performing the swap so I think that it may be somewhat unrelated. The ecu accepted recoding so my instrument cluster now instructs me to depress the clutch to start instead of displaying the shifter position.

    There is no response when the accelerator pedal is depressed. Also no change in VCDS readings when the pedal is manipulated. It does, however, seem to respond favorably to adaption but nothing changes after the adaption is complete. (Please see the following)

    VIN WAUKC68D71A0429889, engine code AWM

    Code:
         Address 01: Engine  (4B0 906 018 M)
    
    13:50:36
      800 /min   Engine Speed (G28)
      16.5 %   Engine Load 
      4.3 %   Throttle Valve Angle 
      4.3 %   Throttle Valve Angle 
      1.2 %   Accel. Pedal Pos. Sensor 1 (G79)
      0.0 %   Accel. Pedal Pos. Sensor 2 (G185)
      1.2 %   Accel. Pedal Pos. Sensor 1 (G79)
      86.7 %   Kick-Down Alignment Value
          Kick-Down Switch
      ADP. O.K.   Kick-Down Alignment Status
    Monday,15,February,2016,17:13:34:21552
    This is the screen I get after running adaption:
    Code:
                    Address 01: Engine  (4B0 906 018 M)
    
    17:13:31 Group 060: Throttle Body Alignment
      16.4 %  Throttle Valve Sensor 1 (G187)
      83.6 %  Throttle Valve Sensor 2 (G188)
      8  Throttle Adaptation Steps Counter
      ADP. O.K.  Throttle Body Alignment Status

    Code:
    VCDS Version: Release 15.7.2 (x64) Running on Windows 7 x64
    Data version: 20151124
    www.Ross-Tech.com
    
    Monday,15,February,2016,16:47:29:21552
    
    Chassis Type: 8D - Audi A4/S4/RS4 B5 (1995 > 2001)
    Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77
     
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 058-906-018-ATW.lbl
       Part No: 4B0 906 018 M
       Component: 1.8L R4/5VT     G   0003  
       Coding: 16201
       Shop #: WSC 00402  
       VCID: 2B5B0A0BD9510066EE-515A
    
    No fault code found.
    Readiness: 0110 1101
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 8E0-614-111-EDS.lbl
       Part No: 8E0 614 111 A
       Component: ABS/EDS 5.3 QUATTRO D10  
       Shop #: BB 24334  
       VCID: 1C39D9D78CFFF7DE97-515A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8D0-820-043-1D.lbl
       Part No: 8D0 820 043 Q
       Component: A4     KLIMAAUTOMAT D58  
       Coding: 00140
       Shop #: WSC 06435  
       VCID: 2E5D031FEA43754EC9-25B2
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 8D0-959-655-AI8.lbl
       Part No: 8D0 959 655 G
       Component: Airbag Front+Kopf  1002  
       Coding: 00306
       Shop #: WSC 06435  
       VCID: 3A753F4F260BA9EE65-5178
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 8D0-920-xxx-17.lbl
       Part No: 8D0 920 980 Q
       Component: B5-KOMBIINSTR. VDO D12   
       Coding: 02244
       Shop #: WSC 20209  
       VCID: 39772043230DA2F66C-515A
    
    2 Faults Found:
    00849 - S-contact at Ignition/Starter Switch (D) 
                31-10 - Open or Short to Ground - Intermittent
    01315 - Transmission Control Module 
                49-00 - No Communications
    
    -------------------------------------------------------------------------------
    Address 35: Centr. Locks        Labels: 8D0-862-257.lbl
       Part No: 8L0 862 257 N
       Component: CV-Pump             D11  
       Coding: 16140
       Shop #: WSC 06435  
       VCID: 40814DA740D7F33E2B-4EE6
    
    7 Faults Found:
    01367 - Central Locking Pump Run Time Exceeded (Likely Leak) 
                35-00 -  - 
    01371 - Alarm triggered by Door Contact Switch; Driver's Side 
                35-00 -  - 
    01374 - Alarm triggered by Terminal 15 
                35-00 -  - 
    01370 - Alarm triggered by Interior Monitoring 
                35-00 -  - 
    01365 - Lock/Unlock Switch; Interior 
                29-00 - Short to Ground
    00991 - Interior Lights 
                28-00 - Short to Plus
    00955 - Key 1 
                09-00 - Adaptation Limit Surpassed
    
    -------------------------------------------------------------------------------
    Address 45: Inter. Monitor        Labels: 4B0-951-173.lbl
       Part No: 4B0 951 173 
       Component: Innenraumueberw.    D03  
       Coding: 00102
       Shop #: WSC 06435  
       VCID: 60C1AD27E017933E0B-4B4A
    
    3 Faults Found:
    01381 - Alarm triggered by Anti-Theft Sensor; Rear Right 
                35-00 -  - 
    01382 - Alarm triggered by Anti-Theft Sensor; Front Left 
                35-00 -  - 
    01383 - Alarm triggered by Anti-Theft Sensor; Front Right 
                35-00 -  - 
    
    -------------------------------------------------------------------------------
    Address 55: Headlight Range        Labels: 4B0-907-357-AUT.lbl
       Part No: 4B0 907 357 
       Component: LEUCHTWEITEREGLER  D004  
       Coding: 00012
       Shop #: WSC 06435  
       VCID: 65CFBC33FF35F616F8-51D0
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 8D0-035-1xx-56.lbl
       Part No: 8D0 035 195 A
       Component:  Radio              D00  
       Coding: 00110
       Shop #: WSC 06435  
       VCID: 2449E137B48FCF1E2F-4B4A
    
    No fault code found.
    
    End-------------------------(Elapsed Time: 03:27)--------------------------
    Last edited by Doug; 02-16-2016 at 10:30 AM.

  2. #2
    NostraJackAss Jack@European_Parts's Avatar
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    ECU is smoked or TV is bad.

    Most likely had codes for OXS Heater shorts before the beloved swap or you damaged one when playing trans swap.

    Unplug OXS sensors and see if the TV comes back online via the pedal...........

    Cause verse effect or it happens again.


    Fuse the tracks ........... which are responsible!

    Starter cranks right? Get the S contact in "D" sorted.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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  3. #3
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    Thank you for the quick reply Jack. I will try unplugging the O2 sensors and see what happens.

    I will look into the D to S also but yes, it does start and run just fine. Just won't rev above idle. Could the D to S issue possibly be that I have jumped the neutral safety relay?

  4. #4
    NostraJackAss Jack@European_Parts's Avatar
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    Is the thing wired as per the WD for a stick?

    www.erwin.vw.com

    Otherwise I'd say change the D ( ignition switch )

    It less likely that a TV is bad........ since it adapts and this also means the fuses related are powered.

    We have the ECU if needed.

    http://www.ebay.com/itm/NEW-AUDI-A4-...e=STRK:MESE:IT

    http://www.ebay.com/itm/AUDI-A4-A4Q-...e=STRK:MESE:IT
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  5. #5
    Benevolent Dictator Uwe's Avatar
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    OK, the first set of measuring values you posted:

    Code:
        Address 01: Engine  (4B0 906 018 M)
    
    13:50:36
      800 /min   Engine Speed (G28)
      16.5 %   Engine Load 
      4.3 %   Throttle Valve Angle 
      4.3 %   Throttle Valve Angle 
      1.2 %   Accel. Pedal Pos. Sensor 1 (G79)
      0.0 %   Accel. Pedal Pos. Sensor 2 (G185)
      1.2 %   Accel. Pedal Pos. Sensor 1 (G79)
      86.7 %   Kick-Down Alignment Value
          Kick-Down Switch
      ADP. O.K.   Kick-Down Alignment Status
    Monday,15,February,2016,17:13:34:21552
    Are you saying that the Accelerator Pedal Position sensor values do not change when you press the pedal?

    If so, get WD, pull ECU harness, check values coming from pedal position sensors with a DVOM while someone presses pedal. If the resistances are within spec and change as the the pedal is pressed, but the ECU doesn't see this, then indeed the ECU is shot. That's a relatively common problem on that generation of ECUs. The way I understand it is the analog inputs are only rated for 5V and not protected against over-voltage. If 12V is applied to any of them, including (for example) if the 12V oxygen sensor heater power gets shorted to the signal coming back from the sensor, then other analog inputs will also go dead.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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  7. #6
    NostraJackAss Jack@European_Parts's Avatar
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    Sometimes a quick visual inspection of the ECU board will reveal damage you can see.......however, not always.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
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  8. #7
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    Quote Originally Posted by Uwe View Post
    OK, the first set of measuring values you posted:



    Are you saying that the Accelerator Pedal Position sensor values do not change when you press the pedal?

    If so, get WD, pull ECU harness, check values coming from pedal position sensors with a DVOM while someone presses pedal. If the resistances are within spec and change as the the pedal is pressed, but the ECU doesn't see this, then indeed the ECU is shot. That's a relatively common problem on that generation of ECUs. The way I understand it is the analog inputs are only rated for 5V and not protected against over-voltage. If 12V is applied to any of them, including (for example) if the 12V oxygen sensor heater power gets shorted to the signal coming back from the sensor, then other analog inputs will also go dead.

    -Uwe-
    Thank you Uwe,
    I am trying to find a wiring diagram and will give it a check as soon as I find one. You are correct. The values do not change when the pedal is pressed. I fear that it's looking more and more like the ecu at this time.

  9. #8
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    I'm still at work but I had my neighbor unplug the o2 sensors and try running it. No change in pedal response. Still nada.

  10. #9
    NostraJackAss Jack@European_Parts's Avatar
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    Doug if you want ...........send me the ECU and I will test the unit NC and report what I find........
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

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  12. #10
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    Wow! That's awesome! Thank you Jack

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