Question about 1999 Jeep Cherokee

Open Question

1999 jeep cherokee crank no start, no bus communication

Fuel pump stays on continuously when switch is on, no bus displayed on odometer, fuel pressure is now all of a sudden between 15-20 psi. and ofcourse snapon scanner will not communicate.The first time it acted up i checked the fuses and found the iod fuse blown, i replaced it, with no different results. i was able to get it started by hitting the press. release on fuel rail. that only worked once. Are all of these related symptoms of a bad pcm?

Posted by on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 2 Answers

SOURCE: 96 jeep grand cherokee wont start

Ok, I had a very similar trouble. It cost me a lot in diagnostic time, but here's what my mech. found.
Symptom, no fuel flow. I don't remember the guages status. Fuses and relays were good. but had blown fuel pump fuse in the past.

Found: Hose connector (A.C.) in vicinity of the fuse box under the hood. (underneath) was chafing the harness from the fuse block to fuel pump, guages, etc. wiggle adjustment temp fixed. Mech found short/ground/ exposed copper wire and repaired the connections. also, protected wire from future damage.

A poorly place connector / harness and vibration were the contributors to the incident. Fix was good and so far permanent.

Posted on Oct 03, 2008

  • 49 Answers

SOURCE: new pump, no fuel pressure at fuel rail??

fuel pump relay

Posted on Oct 04, 2009

J R Dizzle
  • 17 Answers

SOURCE: 2007 Jeep Wrangler Unlimited Crank-No Start. Replaced FP.

Its the TIPM in the PCM. Its part of the recall. That is what's causing the fuel pump to not turn on. What ever you do, DO NOT reroute power to the fuel pump because that will fry the TIPM and cost you $500.00 to fix. Just tow it into the dealer and they will fix the recall for free.

Posted on Jul 13, 2009

  • 3600 Answers

SOURCE: 2001 jeep cherokee sport 6 cyl 4 wdr cranks want start

If the data link is not talking to the computer check your ground at the computer and at the data link connector to see if the computer is even alive ground pin 3 on DLC with the key off then turn key to the run position if it flashes the check engine codes record them, if no engine light, does the engine light come on when you turn the key on then go off? if not, check fuses if not check power for pin on computer, if it has power you have a bad computer. But TEST THE GROUNDS IT IS THE BIGGEST FAILURE For these rigs or any manufacture. check that you have power also at the DLC too. if not you need a digital ohm meter and a subscription to http:///.www.alldatadiy.com and start reading the campaigns on that vechile for computer and trouble tree for dead DLC and computer. I don't have that subscription or I could tell you more where to look, if you need anymore help let me know. Also if the crank sensor could cause it not to run the fuel pump but so can the cam sensor. You need to find out if the computer gets it's pulse for the pump at the computer if it does then you need to test them both. There are three wires a ground a colored power wire and a wire to go to the computer you can test these sensors with a meter to see if there is a pulse to each. sometimes the fuel pump gets it's signal from the coil pack so it's important to have the subscription, you can do a search for each item and test them as needed and has a wiring diagram.

Posted on Jul 27, 2009

  • 159 Answers

SOURCE: 2000 Jeep Grand cherokee Laredo

sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered

Posted on Sep 27, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Tracing an electrical issue with my 1999 Jeep Cherokee sport. when ignition is turned on after a few seconds my odometer says, " no bus" what does this mean ?


The instrument cluster or ignition switch module,
lost communication with the electrical bus or wiring
system & can not be seen by other modules!

Need wiring diagrams & factory trouble charts to diagnose
the fault

May be something on the internet about it ,on your vehicle

Google the issue

Jul 21, 2014 | 1999 Jeep Cherokee 4WD

1 Answer

Jeep still not starting


check the ignition module and the cam sensor.

Dec 02, 2013 | Cars & Trucks

1 Answer

Have no power to coil or fuel pump wont start speedomater say no bus


blown fuse?
my 2002 has no way for speedo to say or display that.
no power, what does that mean.
1: cant hear it.
2: my voltmeter shows 0v cranking.
what?

here is a little rule on pumps fuel
no spark no fueling. so spark is first.
always
and rule 2, the pump on most (1/2?) never pump until cranked.
(fire prevention and other reason, ask)

Nov 28, 2013 | 1999 Jeep Cherokee

1 Answer

My 2000 jeep grand cherokee larado stalled at a red light yesterday just like some one just turn off a switch now gages arnt working right it wont start cranks strong but no spark no fuel presure fuel...


Fuel pump is good, but no fuel pressure? How did you determine that the pump is good?
The ff
Failing gages point towards a problem with the PCI data bus or the PCM itself. This takes quite some troubleshooting to find the cause.
There are many components connected to the PCI bus and any of them could bring the bus down. You can measure the voltage on pin 2 of the data connector on the left side of the drivers footwell area. A good bus voltage is around 2.5 V. There is a PCI bus disconnect plug under the steering tube. By removing the shorting cap, you will disconnect almost all components from the bus. PCM and SKIM will still be connected and you could try to run the engine. You will ot have instruments nor most of the other systems, but this is only to see if the PCM works ok. If it runs, then you will have to look which component or bus wire gives the problem.

Oct 31, 2013 | 2000 Jeep Grand Cherokee

1 Answer

2000 jeep wrangler won't start, good crank, no bus


Check fuses first, but could be needs new CPU

Jun 14, 2012 | 2000 Jeep Wrangler

2 Answers

2001 jeep cherokee want start


Dont worry about wire checks at this point. If the "no bus" message went away after disconnecting the sensor, then the sensor is bad. Replace the crank sensor and all will be good in the world again.

Jul 27, 2009 | 2001 Jeep Grand Cherokee

1 Answer

I have a 99 jeep cherokee sport will not start


Seems to be a chronic problem with crank position sensors... On yours it is tested between b&c terminals and should have no continuity there. (should show an open circuit if good)

Jun 05, 2009 | 1999 Jeep Cherokee

2 Answers

1999 jeep cherokee


a bad crank or cam sensor can cause this as well as a bad computer...find a reputable dealer or garage to check it out for you

Nov 04, 2008 | 1999 Jeep Cherokee

Not finding what you are looking for?
1999 Jeep Cherokee Logo

Related Topics:

358 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

75197 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7782 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...