Power supply to intake temp sensor

Derek Pulvino dbpulvino at hotmail.com
Tue Aug 5 10:50:29 EDT 2003

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
>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
>Matt Rooke
>--- 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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