Power supply to intake temp sensor
matt_20v at yahoo.com
Tue Aug 5 11:24:18 EDT 2003
According to SJM, pins 44 to 30 should show ~500ohms.
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.
--- 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
> >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
> >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,
> >find the section for troubleshooting the sensor
> >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
> > > is always spot on.
> > >
> > > Derek P
> > >
> > >
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