Question about 1994 Jeep Cherokee

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97 Jeep cherokee country 4x4.It will not start the check engine light is on and as a code on the odemeter "no bus".

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It may be that the pcm also called the computer located under the hood is unplugged i left mine unplugged once and the dash said no buss

Posted on Aug 12, 2008

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Loss speedometer and tackmoter in my 2005 jeep grand Cherokee what could it be odemeter still works


the cluster in the the car, is standalone,
its just a display and has self test you can do.
http://www.fixkick.com/Jeeps/jeeps.html#cluster

Check both cluster fuses in the fuse box yet?
one is power other is memory.

if that test passes, and you
THEN PCM, did you scan it yet? (any modern $10 scan tool works here) can-bus rated, scan tools are Ubiquious now.
not scanning the car, and missing can-bus errors is bad idea.
or missing PCM can't talk to the display(cluster) misses the boat.
or VSS errors, or any TCM errors, or other errors, DO SAY THEM.


the PCM sees RPM or the engine can't run , with dead cam or crank sensors. so right off the bat I know PCM is sending RPM .(tacho)

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plug in scan tool and drive, and have helper read the PID called, SPEED . (vss speed) cheap tools can do live data stream.
on ANY PID. (pids are live parameters by number)

do not guess. here, scan it first.
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Remove battery connectors for 5 minutes and reconnect them back.

That should do the trick.

Cheers.

Rate this solution please.

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I just had the same problem of my 2001 jeep cherokee not starting with no gauges responding and a "no bus" reading. After reading the responses I changed out the CPS and my jeep now runs great! however, it was not as hard as I thought it would be. Very easy with 7/16 bit and a 10inch extender. In and out in less than 5 minutes. Finding it was the hardest part. Blends in with the bell housing. I did this from under the jeep with a good shop light. I paid about $80 for the part here in Atlanta, GA

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