Power supply to intake temp sensor

[Matt twentyV]

According to SJM, pins 44 to 30 should show ~500ohms.
(http://www.sjmautotechnik.com/20vairt.html)
I would recommend confirming the pin ##s with
Bentley, but I do recall this is the correct
procedure.  The Bentley will also tell you which
colored wire at the sensor connects to which ECU pin.
And as I said, you need to wiggle the sensor boot
while the ohmmeter is attached as the weld connection
can be intermittent, BT and got fooled the first
time.  I stuck some 2-lead speaker wire into the ECU
connector and strung it into the engine bay where
I attached the ohmmeter.
Matt

--- Derek Pulvino <dbpulvino at hotmail.com> wrote:
> Yes, I've been getting the error code since, well
> for a long time.  I've
> checked at the connections on the temp sensor and
> have not seen any frayed
> wires.  I had the connector off the ECU a coupe of
> weeks ago, and then
> realized that only one connection is listed for the
> temp sensor at this
> interface.  I assume this is the output from the
> resistor.  Not knowing
> which wire provided the input power to the sensor, I
> could't think where to
> attach the other connection on the ohm meter.
> You're saying that power is
> supplied to the temp sensor from the ECU, but from
> which connection?  Is
> there one catch all power supply wire?
>
> Also, anybody know what the input voltage to the
> sensor is supposed to be?
>
> Derek P
>
> >Are you getting an error code for the sensor?
> >I recently traced an error code to a broken solder/
> >weld where the wire leads attach to the sensor.
> >Exactly as described by SJM.  The contact was
> >intermittent so the first time I checked with a
> meter
> >it ohmed good.  Need to wiggle the sensor wire tail
> >a bit to insure it has good integrity.  The sensor
> >is just  2-wire, it is powered and sensed by the
> ECU
> >itself.
> >You can and should ohm out the sensor connections
> >at the ECU connector.  SJM has a good writeup on
> >this, and Bentley also describes the procedure,
> just
> >find the section for troubleshooting the sensor
> error
> >code.
> >Matt Rooke
> >'91cq//20vt
> >'00S4//30vtt
> >
> >--- Derek Pulvino <dbpulvino at hotmail.com> wrote:
> > > Before I spend an hour digging through some
> > > schematics, can anybody direct
> > > me to the above listed location?
> > >
> > > Was going to measure continuity at the ECU
> > > connector, and then realized that
> > > there's only one temp sensor connection at the
> > > ecu...so power's got to come
> > > from somewhere else and not to easy to measure
> > > continuity on an uncompleted
> > > circuit.  Thinking this is a bad connection
> > > somewhere as resistance at the
> > > resistor, and at the connection side of the
> sensor
> > > is always spot on.
> > >
> > > Derek P
> > >
> > >
>
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