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

   #1  

Doug

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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. :banghead: 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)--------------------------
 
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   #2  

Jack@European_Parts

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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.
 
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Doug

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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?
 
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Jack@European_Parts

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Uwe

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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-
 
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Jack@European_Parts

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Sometimes a quick visual inspection of the ECU board will reveal damage you can see.......however, not always.
 
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Doug

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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.
 
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Doug

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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.
 
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Jack@European_Parts

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Doug if you want ...........send me the ECU and I will test the unit NC and report what I find........
 
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   #10  

Doug

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Wow! That's awesome! Thank you Jack
 
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   #11  

Doug

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Is Bentley the best source for wiring diagrams so I can properly check the voltages to the ecu?
 
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DrPeter

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Hello,


Is Bentley the best source for wiring diagrams so I can properly check the voltages to the ecu?
Bentley repair manuals are fine to use for this year of vehicle, they did supplied the NAR dealers with the same information called AESIS up to about 2005/6.

- You can also have a look here for the Official Factory Repair Information links.

Beyond 2009 model years will need to refer to the erWin websites for the Official Factory Repair Information.


We also have provided you 'How to read wiring diagrams - the videos '


Hope that helps,


drpeter
 
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ivagp

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did u have any issues before the swap
 
   #14  

Doug

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Thanks for the links DrPeter

Hello,




Bentley repair manuals are fine to use for this year of vehicle, they did supplied the NAR dealers with the same information called AESIS up to about 2005/6.

- You can also have a look here for the Official Factory Repair Information links.

Beyond 2009 model years will need to refer to the erWin websites for the Official Factory Repair Information.


We also have provided you 'How to read wiring diagrams - the videos '


Hope that helps,


drpeter
Very helpful! I ended up using erwin from your links. The videos were a nice refresher too! I'm trying to learn how to fully navigate erwin now but I have found the schematics I need. I think I have enough data to do some tests tomorrow.
Sorry for the slow reply. I didn't realize that we were on page two so I didn't see the new posts.
 
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   #15  

Doug

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No previous issues before the swap

did u have any issues before the swap
No issues at all. Aside from a leaky automatic, it ran great. I should say that I have had the neighbor kid helping. I'm not as spry as I used to be. Lord knows what he might have done as I didn't watch the whole time. It should have worked with no issues from all that I have read about doing this swap. One thing that I know of was that he wired the main positive alternator lead to ground on the starter. Fortunately it didn't fry the alternator. I don't see any obvious link from that to the current issue though. Perhaps he got rough with the o2 sensor wiring. I understand that is a common cause of this sort of problem is caused by shorting the higher voltage heater wire to the low voltage wire and blasting the ecu. Could be he dropped the accelerator pedal in a bucket of water for all I know though.

Again, sorry for the slow reply. I didn't get a notice of reply in my email and whenever I checked the thread, I didn't look for a second page.
 
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