bobtnt3

Help!!!

My son's cherokee classic '99 wont start. He went fast over a speed bump(as a dad I think very fast), said steering wheel locked up..stopped car, turned it off. Car wont start, no respose from voltage guage or fuel gauge. Parking brake light is on even though its off, park is the only gear that keeps car from rolling. All other gears allow car to roll forward and back. When key is turned to on position, electric fan now runs. Car cranks, but no spark or fuel (i think). Is there some sort of reset in cases of impact?

Any help would be greatly appreciated...


Thanks

XJ Stryker

Woah Nice fault. Torwards the end it started to sound like he may have knocked the CPS loose. Check that connection. Back drivers side of the valve cover. There is only one connector back there might be the problem.

Not too sure though tell him to drive slower or you will kick his

XJ Stryker

Also moved to Cherokee Chat

bobtnt3

CPS connector is intact. Borrowed code tester from work. Pulled a P1694, (manufacturer controlled computer), PCM I assume. Fan runs constantly while key is in on position. I'm thinking it's dealer bound unless any insight....

Thanks again

XJ Stryker

I am at a loss you can try www.Naxja.org they have a huge tech section and an enormous user base I bet they may be able to help you further.

BlueXJ

See if the computer plug was jarred loose. And check the relays on the passenger inner fenderwell.
HTH
Blue

98 JeepJeep

so the car cranks?? but is geting no fuel?? My money is on the Inertia fuel switch....I tripped it once on my mustang when doing a burn out. It should be some where in the 12V power system to the fuel pump.. Its meant to break the circuit and shut the pump off incase of a roll over.

BlueXJ

Unless the later models have an inertia switch then I doubt that is it. I acknowledge I have not worked on a Jeep newer than a 96 but this code seems to point to a disruption of the ECUs signals.
P1694 (M) No CCD Messages Received From ECM Bus communication failure to PCM.

98 JeepJeep

true...Im not 100% sure they have one either...I found out the hard way where my Mustangs Switch was located.

BlueXJ

Yeah I had one on a Bronco I had that was under the dash on the passenger side. Got rid of that vehicle when the timing belt went south on a trip. Good thing I didn't have the engine revving when it popped.

98 JeepJeep

If that was a "interferance" motor that could have got costly real quick.

bobtnt3

Have found no indication that there is such a switch on this model. Traced fuel from tank to engine and read repair manual and no talk of an interrupt circuit. Car is not getting fuel (fuel pump not making usual noise). Checked all tranny elec. connections to engine /computer. Not sure how to check relays in engine compartment.

Love all the great insight though...keep it coming!!!

BlueXJ

The relays are all the same so switch the fuel pump and the A/C ones and see if it makes a difference.

As I alluded to earlier I don't think that XJs have those rollover safety switches.

98 JeepJeep

have the fuses been checked?

bobtnt3

all fuses have been checed. I am chickening out and having car towed to dealer this morning. Getting tired of carting son around. I'll keep everyone posted as to results

thanks for all your help