UrQ low-temp idiot light sensor

[quk@sievers.com (Phil Payne)]

In message <199609041451.KAA16096@urq.East.Sun.COM> Robert Houk - SMCC Bos Desktop Hardware writes:

> That's current track 144, with 143 claiming to be the overtemp warning
> (for the "1984" model year Bentley). The actual overtemp warning is the
> one sandwiched into the coolant "expansion/overflow" return line, and
> not shown in the Bentley at all. This one also engages the high-speed
> radiator fan relay.

I'm not surprised if Bentley is inconsistent.  I don't have the Bentley 
manuals, but from other discussions they seem to be very strongly modelled on 
the European documentation with Audi's approval.

The 1984/5 wiring documentation is a mess.  Basically, the German system starts 
with Schematic No. 1, and obsoletes this in stages.  The numbering gives some 
idea of how their ideas developed:

Audi quattro 1980/1                  1
Central Locking                      2
Electric windows & mirrors           4
Cruise control                       5
Rear wiper                           6
Air conditioning                     7


Audi quattro 1982                    3
Central Locking                      2
Electric windows & mirrors           4
Cruise control                       5   
Rear wiper                           6
Air conditioning                     7

Audi quattro 1983                   13
Electronic instruments               8
Auto-check system                    9
etc.

When you get down to the 1984/5 years, the 1984 plan is number 21 and the 1985 
plan is number 17.  Was the 1984 plan issued _after_ the 1985 one?  It's 
partly hand-written.  Putting together a diagram for a specific vehicle is 
essentially a custom operation - you need to establish a _time_ point in the 
diagrams, and then go backwards to accumulate all of the pieces you need.

I've filed my diagrams, as the factory recommend, in descending number order.  
This isn't, of itself, a guarantee of success because some of the diagrams are 
not thereby in date order.  You have to put together the relevant ones from the 
index.

The relevant numbers for my vehicle are 39 (base), 28, 29, 33, 37, 41.

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