Question about 1994 Jeep Grand Cherokee

2 Answers

How do i reset my pcm on my jeep grand cherokee?

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert that has over 500 points.

  • Expert
  • 244 Answers

Try disconnecting the NEGATIVE cable on the battery for 10-20 minutes. re-connect it. start the vehicle and drive it for a few miles to let the pcm reset. (make sure the key is off and out, just to make sure you don't fry something when you remove the negative-black wire cable!!). don't short it against the positive-red!
make sure the negative connector (on the cable) is isolated from the frame, or it will still be grounded! wrap some plastic around it, or something!
good luck!

Posted on Sep 22, 2009

  • Anonymous Jul 23, 2018

    hog wash.
    The neg lug goes to all grounds in the car.
    the engine,and all electrics.
    you will not remove them all.(pull all harnesses?)

    this is the correct way. below.

    Keep in mind the battery can source up to 1000 AMPS (500 min) of current. Respect it.
    Engine off
    key off
    engine cool.
    hood up, let the battery get fresh air like this (this purges any hydrogen (boom) gas from lingering... ok? Ask any tow truck driver the bad news..

    "the rule on lugs are, NEG off first, last on.." this prevents PLuS lug wrench hitting ground and the battery blowing up and acid to your eyes, ok?"

    Disconnect the NEG battery terminal lug from the NEG post, first.
    Disconnect the PLUS RED lug last, now.
    The battery posts are now empty. (look 2 times be sure)
    Next. touch the 2 free ended cable (I clean them now) and touch the 2 free ends together, this is it discharge step.

    This is to discharge the PCM/BCM/SCM ... and more CPU brains, capacitors, which maintain the Adaptive Memory.
    Let the car sit for say 30 minutes. (some folks skip this step, and can be ok.)

    Reconnect the Battery PLUS LUG now. and NEG lug last. (the only safe way there is, ok?)

    The headlamp bit my be internet myth (IDK)
    Turn Ignition Switch to the “On” position but DO NOT start the engine
    Turn Headlight “On”
    Turn Headlights “Off”
    Turn Ignition Key “Off”
    this next part is not myth.
    The PCM will start to collect data for the “Adaptive Memory”.
    The TCM will learn new transmissions shift points and your style of driving.
    The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles. (including idle speed controls)

    ,end my way.

    I have the 7000 page WK factory manual
    and this is not in the book.
    (best I can tell)
    buy some high end jumper cables and read the manual.
    or take and ASE class....

  • Anonymous Jul 23, 2018

    one other side effect of above, is the cars radio station presets buttons ,may be lost.
    nothing tragic, just re set them again.
    on some cars.(older for sure)


  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

I just replaced My ignition coil and my car is still cutting off what should I do

Posted on Jul 07, 2013


5 Suggested Answers


6ya staff

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


  • 1 Answer

SOURCE: 96 jeep grand cherokee wont start

my 1996 jeep is doing the same thing.the fuse I have been changing is under hood in fuse panel on left 20 amp sm. in center of fuse panel closest to bat.

Posted on Aug 22, 2008


  • 1 Answer

SOURCE: 2001 jeep grand cherokee no start, no cam signal or ASD control from pcm


Posted on May 15, 2009


  • 7 Answers

SOURCE: where is the pcm on 1997 jeep grand cherokee 6 cyl?

I don't think the PCM is your problem, is the check engine light on? It could be you idle air control motor this is located on the throttle body, but because this happens while driving I am thinking you will need to replace your crank shaft position sensor it is located on the transmissinon bell housing it is very hard to replace without the correct tools. If the check engine light is on take it to a local auto parts store and ask if they can check the check engine codes for you they usally will do this for free.

Posted on Jun 03, 2009


  • 2926 Answers

SOURCE: 99 jeep grand cherokee no start 4.0L no power to

Check the auto shut down (ASD) relay located in the power distribution box.

Posted on Jul 23, 2010

Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

Resetting my tpms light on my 2006 jeep grand cherokee

Sounds like the batteries might be dead in one of the sensors inside wheels.. Also try to put air in all of the tires.. It should reset itself..

Nov 06, 2016 | 2006 Jeep Grand Cherokee

1 Answer

2003 jeep grand Cherokee how to reset security

immoblizer or alarm>?
it does each keyon, by design...but...
pull battery neg lug. for 5min
put back.
its fully reset. (
or pull both fuse to it.

or read the chapter in it here (posted over 100 times now)

1: check fuses (we test them not guess)
2: try both key fobs? (it came with 2 so.....try both)
3: scan PCM for errors. (or lose)

Jun 13, 2015 | 2003 Jeep Grand Cherokee

1 Answer

Where is the PCM located on a 1994 Jeep Grand Cherokee Ladaro


The PCM module is located under the hood, on top of the firewall and near to the coolant reservoir.

Here all modules. Click on the picture to enlarge:


Here the PCM:


Jul 19, 2011 | 1994 Jeep Grand Cherokee

1 Answer

How do you reset the perform service alarm in a 2002 jeep grand cherokee

Remove the PCM fuse for five minutes then replace it.
Don't remove the battery cable first. It has to have power to it so it don't think there is a power loss.

Dec 17, 2010 | 2002 Jeep Grand Cherokee

1 Answer

2006 jeep cherokee cant reset computor showing low tyre presure tyres all good

The TPSM (Tire Pressure Sensor Monitor) just is "reset" with special tool in your delaer, the ECU/PCM reset dont affect this signal from TPSM.

Hope help with this, good luck (remember comment and rated this).

Jul 23, 2010 | 2006 Jeep Grand Cherokee

1 Answer

The cruise on my 2006 jeep gr. Cherokee started acting up. It was set and then it started accelerating for no reason. I reset it and was fine. It did the same thing later that day but now it cant be set....

The problem is with the PCM (Powertrain Control Module). It made be malfunctioning or may just need to be reset (disconnecting and reconnecting the battery). If it ends up being a bad PCM then bring it to the dealership and the PCM is covered under warranty for 8 years 80,000 miles.

Hope this helps.

May 13, 2010 | 2006 Jeep Grand Cherokee

2 Answers

How do you reset a anti-theft system on a 1998 jeep grand cherokee limited 5.2 v8.

You can pull the battery for 10 mins and it should reset the entire ECU PCM and Anti Theft system

Sep 01, 2009 | 1998 Jeep Cherokee

1 Answer

2006 jeep grand cherokee - cruise light does not come on, and cruise does not engage. after cruise started not working, the cruise light came on briefly one more time.

Most likely a problem with the PCM (Powertrain Control Module). It may be malfunction or it may just need to be reset. Try disconnecting and reconnecting the battery for about a minute. If that doesn't work then go to the dealer and they will run a diagnostic test for about $95. If the PCM is the problem it will be covered under manufacture warranty for 8 years 80,000 miles.

Hope this helps.

Aug 08, 2009 | 2006 Jeep Grand Cherokee

1 Answer

I have a 2006 Jeep Grand Cherokee Laredo. When I set the cruise control it automatically jumps to 85-90 mph and resets itself there. Help.

I working on a car with the same problem I replaced the PCM (Powertrain Control Module) per Engineering to correct condition. It is covered under the federal emissions warenty for 8 years 80000 miles. Wierd problem just started seeing this to.

Jul 16, 2009 | 2006 Jeep Grand Cherokee

Not finding what you are looking for?
1994 Jeep Grand Cherokee Logo

Related Topics:

4,864 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

85222 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

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

Answer questions

Manuals & User Guides