Check engine light

[quk@sievers.com (Phil Payne)]

In message <970423182211_75363.2524_EHI60-1@CompuServe.COM> Joe Yakubik writes:

> I got a momentary check engine light this morning.  Is it possible to read the
> codes on the 3B motor w/ Motronic ignition via a test LED?  The Bentley lists
> this procedure only for the K-Jetronic motors.  Or do I need the 1551 wonder
> tool?

The following is in preparation for the ur-quattro 20V.  Yours may be similar:
==============================================================================
Nasty.  Buy a VAG 1551.  Otherwise - time for some ASCII art:
 
         1       2       3
       /---\   +---\   +---\
       | O |   | O |   | O |  2
       +---+   +---+   +---+
       | O |   | O |   | O |  1
       +---+   +---/   +---/

1 is black, 2 is brown and 3 is blue.

This connector is (in a German car) in the driver's footwell.  I assume it 
will be on the passenger side in a UK car.


The pin assignments are:
  
      1.2  Positive
      1.1  Chassis
      2.2  J220 or VAG 1598 pin 13
      2.1  J220 or VAG 1598 pin 55   

Connect a diode test lamp between 1.2 and 3.2.  Attach leads or a push-button
between 1.1 (A) and 2.1 (B). 

Connect A and B for four seconds.  The diode should light up.

Break A and B.  A code will be blinked out.  To get the next code,
touch A and B together for four seconds again.  The end is signalled
by 0000 - pulses 2.5 seconds apart.  Code 2111 should be ignored if
the ignition is on and the engine is not turning, unless an unsuccessful
attempt has been made to start it. 
============================================================================
Let us know what the codes are - the table is too long to post.  Well,
too long to type, anyway.

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club