conversion info needed...

[Ti Kan]

OK, take the knock sensor wire as an example.  According to the
1986 5000 turbo quattro (MC engine) wiring diagram in my copy of
the Bentley manual, the knock sensor wire in the engine
compartment has a 3-pin connector that has three colors for its
wires (black, yellow, brown).  The signal lead is the black wire,
and is supposed to go to pin 15 of the ECU plug, the other two
wires are ground.

Thus, you set your multimeter to the resistance (ohms) mode with
the lowest scale, place one test lead of the multimeter on pin 15
of the ECU plug, then place the other lead on one of the unidentified
connectors' pins which has the black wire on it, and see which one
will cause the meter to register a reading that's close to zero ohms
(it won't be exactly 0, but should be a fraction of an ohm due to
wiring resistance).  Found it?

You do a similar thing to verify the other unidentified plug(s).
BTW, the Bentley shows three such 3-wire plugs with the same
color coding.  One for the knock sensor, one for the timing sensor,
and one for the RPM sender.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
--
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.amb.org/ti/
///

luke writes:
> i know this is a dumb question... but how do i test continuity?
>
> luke
>
> > luke writes:
> > > the tape distinguishing my TDC and knock sensors fell off :(
> > > how evil is that?
> > > i opened the connectors but both have identical coloured wires...
> > > how can i tell whats right? what problems can this cause etc?
> > > does it need TDC sensor to run?
> >
> > Sort it out by testing for continuity between the appropriate ends
> > using an ohmmeter.  You know which pin at the ECU each of these
> > sensors are supposed to be wired to, right?