Question about 1999 Jeep Grand Cherokee

1 Answer

1999 pcm problem

Looks like no voltech going to the pcm fuses are good

Posted by on

  • Richard Scordino May 11, 2010

    get a diagram and start testing individual wires.

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 161 Answers

I am not sure I understand your problem but I assume the truck is not running , no power to pcm ect. I have had jeeps sent to me after thousands of dollars have been pured into them and still wouldnt start. Change the CRANK SENSOR. This will 99% of the time fix this problem. When you go to the part store just make sure to give them the correct info. it is located on top of the transmission bell housing and is held in by 1 bolt most of the time it is a 10mm bolt . it is sometimes a pain but its on the drivers side top of bell housing . look at the new one to get idea of what it is. follow wire harness and unplug then take bolt out and remove sometimes you have to twist and pull out. put the new one in put bolt back and plug in. if it has a piece of felt on the tip leave it on it will come off its self . jeeps have a lot of pcm problems but the crank sensor can fool even the best mechanics making it look like a pcm problem. I take it you have not changed pcm's. if you do it will have to go to dealer to be programed and flashed in order to stay running. but hpoefully you havent changed pcm yet and go ahead and change that crank sensor asap

Posted on May 24, 2009

Ad

1 Suggested Answer

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

I have no start and no ground to injectors. 99 tahoe 5.7


The PCM controls the ground to the injectors. Does the check engine light come on for a bulb check when the key is turned on? Check ECM fuses in underhood fuse/relay center. There is usually 2 10 amp fuses protecting the PCM circuitry.

Apr 25, 2015 | 1999 Chevrolet Tahoe

1 Answer

1999 ford truck trip computer not working


if power going to pcm more likely it could have failed i would code scan see if you get pcm failed fault code you dont need to buy a new pcm if you dont need one they are expensive.

Feb 12, 2012 | Cars & Trucks

1 Answer

The windsheild wipes, windows, radio, and the heater/air went out on my 1999 ford crown victoria. the head lights still work though. the fuses look good. what do you think it is.


HAVE DEALERSHIP CHECK IT OUT YOU HAVE EITHER ELECTRICAL PROBLEM OR PCM PROBLEM SINCE WINDOWS , RADIO, AC AND HEATER CONTROL CONTROLLED BY PCM.

Sep 30, 2011 | 1999 Ford Crown Victoria

2 Answers

I have a 1999 Alero 3.4 V6 the cooling fans won't run. I checked the fans they both work if I unplug the harness for the temp sensor,the relays and fuses are fine,I replaced the coolant temp sensor and...


CHECK MODE RELAY IF BOTH RELAYS GOOD YOU CAN CHECK RELAY BY REMOVING IT FROM FUSE BOX HOOK RELAY TERMINAL 85 TO BATTERY POSITIVE AND GROUND TERMINAL 86 IF CLICKS RELAY GOOD. IF RELAY GETTING POWER GOOD AND THE 30 AMP COOLING FAN FUSE OKAY.EITHER THERE IS A SHORT IN COOLING FAN WIRING OR THE PCM HAS FAILED.THE PCM HAS LOST OR COMMAND RUN CIRCUIT IN PCM SHORTED OUT DUE TO PCM FAILURE.LET DEALERSHIP OR GARAGE USE DIAGNOSTIC EQUIPMENT TO ACTIVATE THE PCM SEE IF IT HAS FAILED.DONT SPEND MONEY ON NEW PCM COULD BE SHORT IN THE WIRING CIRCUIT

Sep 06, 2011 | 1999 Oldsmobile Alero

1 Answer

Will not start put fuel in carb and started and turned off fuel pump is good think it might be pcm


CHECK FUEL PUMP PRESSURE. SHOULD BE 41 - 47 PSI. IF FUEL PRESSURE REAL LOW CHANGE FUEL FILTER.STILL LOW FUEL PUMP FAULTY. IF FUEL PUMP NOT RUNNING CHECK FUEL PUMP FUSE OR RELAY.IF ALL IS GOOD FUEL PUMP BAD. HAVE VECHICLE SCANNED WITH A SCANNER BEFORE BUYING NEW PARTS. LOOK FOR FUEL PUMP FAULT CODES AND PCM FAULT CODES.

Dec 26, 2010 | 1999 Oldsmobile Alero

1 Answer

My car wont start,you turn the key , and sounds like it's going to start but it just wont' i already take to the mechanic he had the car for about 2 months i get the car back ; he said it was fix and now...


FIRST GET A SPARK TESTER TO SEE IF YOU ARE GETTING SPARK AT SPARK PLUGS.IF NOT CHECK IGNITION MODULE FUSE.IF FUSE GOOD HAVE CAR HOOK UP TO SCANNER LOOK FOR IGNITION MODULE FAULT CRANKSHAFT SENSOR FAULT AND PCM FAULT.IF ALL LOOK GOOD SO FAR.CHECK TO SEE IF FUEL PUMP WORKING.CHECK PUMP FUEL PRESSURE IT SHOULD BE 41 - 47 PSI. IF NOT REPLACE FUEL FILTER STILL LOW REPLACE FUEL PUMP.IF FUEL PUMP NOT WORKING AT ALL CHECK FUEL PUMP FUSE AND RELAY.IF BOTH IS GOOD FUEL PUMP AT FAULT.BUT SCAN TO CHECK FOR PCM FAULT CODES IT CONTROL SPARK AND FUEL SYSTEM.MAKE SURE SPARK PLUGS AND WIRES IS GOOD. ALSO CHECK FUEL INJECTORS FUSE ALSO.

Jun 08, 2010 | 1999 Oldsmobile Alero

1 Answer

PCM protection diode and PCM relay I have a diesel 1999 f 250, is this under the hood in with the other fuses. or by its self. I have a p0603 Inernal crtl mod cam error, and some one said to look at the...


Fuse #2 in the fuse box behind the driver's knee panel is the 5amp "KAM" fuse. The others,in under the hood fuse box would not be a concern as without them being good the engine will not start and no code read would be possible.

Oct 25, 2009 | 1999 Ford F250 Regular Cab

1 Answer

Where is the PCM located on a 1999 chevy cavalier 2.2 liter 2 door? I'v got 12 volts to all but no gauges, no accessories and no turnover on motor. Changed ignition switch already, fuse link is good and...


before you change the pcm. check battery cable to the starter sometimes they get lose or burn brake . chek the engine fuse . its in the engine compartment.

Aug 24, 2009 | 1999 Chevrolet Cavalier

1 Answer

No power to fuel pump 1999 sunfire


Check the wiring at the fuel pump assembly for corrosion, if the wires look ok, i would then move to the Crank and cam shaft sensors. if these sensors are not in good condition , it will cuase these actions.

if everythign checks out ok with the sensors, this will confirm a serious PCM issue.

Jun 19, 2009 | 1999 Pontiac Sunfire

2 Answers

Are the radiator fans on the 1999 RAV4 controlled by a fuse? The fans on my vehicle stopped spinning leading to overheat conditions.


The fans are controlled by a temp gauge, the PCM, the relays and are fused. Start with the easiest the fuse and then go towards the relays. Try jumping past teh relays to see if they run. The PCM tells the fans to go on but if the fuse is popped or the relay is bad they'll never go on.

Jun 14, 2009 | 1999 Toyota RAV4

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

447 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

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

Answer questions

Manuals & User Guides

Loading...