1999 A6 2.8 FWD

The INSP light had been on for a while - I ignored it for a thousand miles or so. I was doing some work on it and had the battery cable off for a couple days ( I was replacing the stalk switches on the column). When I reconnected the battery, it started up rough and only would idle at 250 rpm or so. I hear in a previous post it could be throttle body related, and I tried the hold down the gas/key on thing. It did not help. Anyway, I was able to get someone (who is gone now) to pull a scan for me, but I do not know how to interpret it. Any experts out there that might be able to help.

Thanks... ...Mike


VCDS
Windows Based VAG/VAS Emulator
VCDS Version: Release 908.1 Data version: 20091018
w w w . R o s s - T e c h . c o m
Dealer/Shop Name:
Workshop Code: 000 00000
Self-Diagnosis Log
Saturday,20,February,2010,14:45:19:24960
VIN: WAUAA24B8XN999999 License Plate:
Mileage: 208850km-129773mi Repair Order:
Chassis Type: 4B - Audi A6 C5

Scan: 01 02 03 06 08 15 16 17 18 34 35 36 37 45 55 56 57 65 67 75
------------------------------------------------------------------------------- Address 01: Engine Labels: 078-907-551-AHA.lbl
------------------------------------------------------------------------------- Address 02: Auto Trans Labels: 01V-927-156.lbl
------------------------------------------------------------------------------- Address 03: ABS Brakes Labels: 8E0-614-111-ASR.lbl
-------------------------------------------------------------------------------
76 77
Mileage: 208850km/129773miles
Part No: 4D0 907 551 AH
Component: 2.8L V6/5V MOTR AT D04
Coding: 06152
Shop #: WSC 40536
3 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
17967 - Throttle Body (J338): Fault in basic settings
P1559 - 35-10 - - - Intermittent
17953 - Throttle Valve Controller: Malfunction
P1545 - 35-00 - -
Readiness: 0110 1101
Part No: 4B0 927 156 F
Component: AG5 01V 2.8l5V USA 8509
Coding: 00000
Shop #: WSC 00000
1 Fault Found:
00526 - Brake Light Switch-F
27-00 - Implausible Signal
Part No: 8E0 614 111 C
Component: ABS/ASR 5.3 FRONT D00
Coding: 00003
Shop #: WSC 02325
No fault code found.VCDS


Self-Diagnosis Log
Saturday,20,February,2010,14:45:20:24960
Page 2
VIN: WAUAA24B8XN999999 License Plate:
Address 08: Auto HVAC Labels: 4B0-820-043-MY1.lbl
------------------------------------------------------------------------------- Address 15: Airbags Labels: 4B0-959-655-AI8.lbl
------------------------------------------------------------------------------- Address 17: Instruments Labels: 4B0-919-xxx-17.lbl
-------------------------------------------------------------------------------
Part No: 4B0 820 043 P
Component: A6-Klimavollautomat D62
Coding: 00160
Shop #: WSC 02325
No fault code found.
Part No: 4B0 959 655 H
Component: Airbag Front+Seite 0002
Coding: 00106
Shop #: WSC 02324
No fault code found.
Part No: 4B0 919 930 RX
Component: C5-KOMBIINSTR. VDO D18
Coding: 07262
Shop #: WSC 19411
No fault code found.
VCDS



Self-Diagnosis Log
Saturday,20,February,2010,14:45:20:24960
Page 3
VIN: WAUAA24B8XN999999 License Plate:
Address 35: Centr. Locks Labels: 4B0-962-258.lbl
09-10 - Adaptation Limit Surpassed - Intermittent
09-10 - Adaptation Limit Surpassed - Intermittent
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
Part No: 4B0 962 258 J
Component: Central Lock/Alarm D32
Coding: 15885
Shop #: WSC 00000
17 Faults Found:
01366 - Opened Due to Crash Signal
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01572 - Alarm triggered by Door Contact Switch; Passenger Side
35-00 - -
01374 - Alarm triggered by Terminal 15
35-00 - -
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01368 - Alarm triggered by Luggage Compartment Switch
35-00 - -
01558 - Contact Switch in Locking Cyl; Driver Side; Close (F241)
29-00 - Short to Ground
01557 - Contact Switch in Locking Cyl; Driver Side; Open (F241)
29-00 - Short to Ground
01389 - Tailgate Open Switch (F124)
29-00 - Short to Ground
01563 - Interior Lock Switch; Driver Side (E150); Lock
29-00 - Short to Ground
01564 - Interior Lock Switch; Driver Side (E151); Unlock
29-00 - Short to Ground
00947 - Trunk Lid remote Control Switch (E188)
29-10 - Short to Ground - Intermittent
01565 - Luggage Compartment Light (W3)
29-10 - Short to Ground - Intermittent
00955 - Key 1
00956 - Key 2
01574 - Alarm triggered by Door Contact Switch; Right Rear
35-00 - -
01573 - Alarm triggered by Door Contact Switch; Left Rear
35-00 - -
Address 36: Seat Mem. Drvr Labels: None
Part No: 4B0 959 760 A
Component: Sitzmemory D05
No fault code found.
VCDS



Self-Diagnosis Log
Saturday,20,February,2010,14:45:20:24960
Page 4
VIN: WAUAA24B8XN999999 License Plate:
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
-------------------------------------------------------------------------------
End ---------------------------------------------------------------------
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00001
Shop #: WSC 02325
No fault code found.
Address 56: Radio Labels: None
Part No: 8N0 035 186 A
Component: Radio D03
Coding: 00207
Shop #: WSC 40536
No fault code found.

 

Go to www.ross-tech.com and www.BentleyPublishers.com
My Bentley does not cover the 1999 model year.

 

To be honest with you 90% of these codes are caused by having the battery disconnected. I would imagine that if you erased all the codes the only ones that would return is the throttle body code and brake switch code. The brake switch code is important for cruise control, braking, ABS reasons etc. but it won't cause the engine to idle weird. That will lie with the throttle body. To do a throttle body alignment without a vag com scanner just turn the key to the ON position and leave the car alone for 12-15 minutes, the throttle body should set itself. I would recommend cleaning the throttle body valve with brake cleaner before doing the aligment though.

 

Not knowing much about the scans, the

3 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low -P1602 - 35-10 - - - Intermittent
17967 - Throttle Body (J338): Fault in basic settings-P1559 - 35-10 - - - Intermittent
17953 - Throttle Valve Controller: Malfunction-P1545 - 35-00 - -

would seem to indicate that its TB related,

I have tried a few of the key/timing ( 2 minutes, 15 minutes, etc) tricks now, and none of them even make any noise at the TB. Are the gimmicky resets 'official' ? If they do not work, should I even hope that a VAG-COM based TBA would be better ? ( If so, I'll look out on vag tool finder dot com and see if I can rustle up a unit near Cary. NC.

Thanks...

 

Correct, the voltage too low fault is from the battery, the throttle body will usually throw those codes when the battery is removed. If the key cycle trick isn't working for you, it needs to be done with a vag com. You could also have the dealer re-set it for you but that could be pricey.

 

Did you disconnect the battery first, reconnect and do the throttle body alignment using the procedure? You should.

 

throttle body calibration guaranteed............... adaptation channel 61 in the ECM if i'm not mistaken

 

I will have access to a vag-com tomorrow.
I am unfamiliar with its use, but found a procedure at

www dot ross-tech dot com
/vag-com/cars/throttlebody.html

One of the pre-reqs says there should be
* No DTC's in the Engine Controller

I am very new at this (but want to learn)
Do the codes listed here mean I can't do this?

Address 01: Engine Labels: 078-907-551-AHA.lbl
Part No: 4D0 907 551 AH
Component: 2.8L V6/5V MOTR AT D04
Coding: 06152
Shop #: WSC 40536
3 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
17967 - Throttle Body (J338): Fault in basic settings
P1559 - 35-10 - - - Intermittent
17953 - Throttle Valve Controller: Malfunction
P1545 - 35-00 - -
Readiness: 0110 1101

Also - I'm supposing I have motorized throttle control and not drive by wire - is that right ? Its a 99 A6 (C5) AHA 2.8 30v

Thanks again - I will let you all know how it works out.

...Mike