RE: Help - Code for 94 90Q

[lawrence_e_renaud@reed.aon.ca]

Hi guys,

Phil was right in that error code 2111 is normal when running the onboard
diagnostic with the car not started (any fault related to the Engine Speed
Sensor, Camshaft Position Sensor and Crankshaft Position Sensor will
prevent the car from starting).

I found this out through the online version of Alldata
(www.alldatadiy.com). For $20 I was able to access all sorts of information
and shop manual for my model (info available for nearly all makes and
models!). At that site I was able to find out how to cycle through the
onboard diagnostic.

Not only did error 2111show up, but with the new info I also found error
3112. This indicated a fault relating to the Camshaft Position Sensor.
Alldata gave me all the specs for the sensor as well as test procedures (I
used a multimeter). As this sensor works in conjunction with the Engine
Speed Sensor and the Crankshaft Position Sensor, I tested all the wires and
sensors for the possibility of a short, before actually buying and
replacing the Camshaft sensor. After all units showed no faults, I replaced
the Camshaft sensor and... bingo! The car started up on the first crank!

Thanks the help, advice and info.

- Lawrence






"Buchholz, Steven" <Steven.Buchholz@kla-tencor.com> on 08/23/99 02:52:42 AM

To:   Chris Newbold <cnewbold@earthlink.net>, Lawrence E Renaud/ARS/CA/AON,
      quattro@audifans.com
cc:
Subject:  RE: Help - Code for 94 90Q




> Code 2111 is the engine speed sensor. If it goes bad, the engine
> will continue to run (I think by using alternate data, such as
> cam and crank position to derive RPM). However, the engine will
> not start with a bad RPM sensor.

... no ... the engine's "speed sensor" is the one that is looking at the
flywheel teeth ... and provides the precise position information used for
firing the plugs.  The engine cannot run without it.  As I have been
experiencing on the PT (3.6l v8) over the past couple days ... the tach
will
drop to -0- if the speed sender stops working.  The V8 doesn't need the
flywheel "reference sender" (the one that indicates TDC) to start and/or
run, and I would imagine that the V6 would have the same characteristic.
At
least the 2111 code is quite familar to me ...

Steve Buchholz
San Jose, CA (USA)