Question about 2001 Jeep Grand Cherokee

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2001 jeep grand cherokee the compass/temp reads -40F the compass seems to be fine its just the temperature that is not working

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Before replacing the module ($$$$) check the temperature sensor at the front of the vehicle behind the bumper or grill. A reading of -40 indicates a high resistance (NTC resistor sensor). This is probably due to water ingress on a connector causing the high resistance. But could be a bad sensor too. You can also check the module by unplugging the temperature sensor and shorting the two wires that go back to the module together. Shorting the two wires together should show an off scale high reading like 120 or 130 degrees. If it does then the module is OK the problem is the wiring or the sensor. You can use this method to check the wiring all the way up to the module incase there is high resistance in the wiring between the module and the temperature sensor.

Posted on Sep 22, 2008

Need overhead module

Posted on Aug 17, 2008

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2001 jeep grand Cherokee every time I start it Idles rough and cuts out until warm and if heater is turned on when cold it cuts out really bad and dies. but after completely warmed up runs fine. (?)


ok no engine stated?
if gas engine, ?
I bet never tuned-up up in decade,right?> that gets 99% here.
but it can be far more complex, not guessing,,
what if , the ECT reads wrong.
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all EFI cars do that ,everyone, like that.'

forget heater (that blow'r motor sucks 15amps and alternator puts that load on the engine, breaking the CAMELS back, for get that
fix MISFIRE COLD that is the problem.!! real.

and new spark plugs top that list????
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and scanning the ECT.
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yes ECT can be scanned keyon, not started.

correct means if last night was 40f, the ECT is 50f in morning
or lower. say 41f.
-20f wrong, 0f wrong , got that? not blow average of last nights
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the air cleaner can be packed.up
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How can I reset jeep compass comput(er) after replacing battery?


is this a compass car?
or are you say fiddling he electronic compass on a grand Cherokee.
or the compass on a compass, OMG.

if fiddling the electronic compass
the operators guide covers that.
lost that.
its here.
2004 and up

http://www.jeep.com/en/owners/manuals/


read the manual first, then ask for help of lost.

it is there, read it.

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there are many temp sensors. on jeeps. and more each year it seems.
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post symptoms, then ask how to diagnose car.

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