Recently purchased VAG-COM - full version & cable to resolve a Convenience module problem.
That's all sorted, but I also found an error relating to the engine,
"18325 - Relay for Coolant After-=Run (J151): Open Circuit"

Here is an extract from the log.......

Saturday,24,November,2007,17:04:50:25429
VAG-COM Version: Release 704.1
Data version: 20071016
Chassis Type: 01 - MY Audi A4
Scan: 01 02 03 08 09 15 16 17 45 46 56

VIN: WAUZZZ8E22xxxxxxx Mileage: 83800km/52070miles
--------------------------------------------------------
Address 01: Engine Labels: None
Part No SW: 8E0 909 559 H HW: 8E0 909 059
Component: 3.0L V6/5V G 0003
Coding: 0011751
Shop #: WSC 00088
1 Fault Found:
18325 - Relay for Coolant After-Run (J151): Open Circuit
P1917 - 004 - No Signal/Communication
Readiness: 0110 1101
--------------------------------------------------------
Address 02: Auto Trans Labels: 01V-927-156.LBL
Part No: 8E0 927 156 G
Component: AG5 01V 3.0l5V RdW 0808
Coding: 0000001
Shop #: WSC 63351
No fault code found.
--------------------------------------------------------

I have consulted the workshop manual to locate the suspect item (J151), which I suspected was located in the waterproof housing with the ECM & Bosch Motronic control modules and relays/fuses. Workshop manual show it here on the relay / fuse block.

However, although I have found a physical relay where (J151) should be it does not connect to the after run pump.
I suspected this since all the documented wire colours were different to the realy?
What I deduced is the relay in place is the starter motor relay - i.e. control signal from ECM and momentary +12v off the ignition key switch drives the starter motor.
(I guess the ECM signal is part of the immobilizer circuit to prevent engine starting.)
This circuit variation is not documented in the circuits I have.
Now reading the *note and small print on the circuits indicates that (J151) and associated circuitry is for Hot Countries only.
I would guess that the UK is not catergorized as a Hot Country?

I can only deduce that my ECM is not "adapted" correctly - hence the error message since the J151 circuit is not present.
Alternatively, this circuit is implemented in another way with other hardware elsewhere?

I query the adaption as I purchased the car 2nd hand in 2003 (2 years old), and the ECU was replaced under warranty within 4 weeks of this owing to "Oil Level Low" warning popping up every 50 miles. This was found to be an ECU software problem. At that time I recall going back to the Audi garage since they had not enabled my Cruise Control when fitting the new ECU.

[My Car: Audi A4 3.0L (B6) Quattro Sport - 5 speed Tiptronic - 4 dr Saloon]

Anybody got any ideas?