Question about 1993 Jeep Grand Cherokee

1 Answer

Engine stalls when driving on highway or in town . Disconnected battery terminals to reset computer . turn the key three times and read the engine check light flashes a two digit code 12 - 11 - 55 I know that code 12 means that the battery has been disconnected more than 50 time and code 55 means end of engine code transmission but... have not been able to under stand " no signal detected from the distributor then it states check the wire or connection between the PCM and distributor .... what is the PCM ? and what does it stand for ?????

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 13 Answers

Pulse count modulator, there is a half circle of steel in the distributor, when the steel half circle passes a hall effect sensor ( pcm ) it tells the engine to fire on cylender number one. and the other half of the steel circle exits the hall effect sensor it tells it how fast it was turning. so all the other spark plugs fire at the correct time. The other part is that the pcm cystem is part of a coil that is wound around plates of steel if the plates of steel get wet (over time they tend to rust ) the rust swells the steel and the coil gets broken by the expanding rusty steel. so replace the coil portion of the distributor. just follow the singel wire to the block of steel ( coil is encased in rubber or molded plastic. ) but the coil is breaking or getting stretched and bearly touching and when it gets hot the metal expands too. and it fails. just follow the singel wire inside thedistributor to its coil : replace that and your good to go.

Posted on Feb 21, 2009


1 Suggested Answer

  • 2 Answers

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

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.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

I replaced the alternator on my 1999 Audi A6 with 2.8 engine. Now the check engine light is on. Was not on prior to the repairn. How do I correct?

Instructions on How to Turn Off The Check Engine Light:
Step 1. If not using a scan tool, locate your vehicle's battery. Disconnect the 12v positive cable (red wire) from battery terminal (+). Leave it disconnect for 5 minutes. While the battery is disconnected, cycle the ignition switch to ON position 3 times. If using a scan tool to turn off the check engine light, follow manufacturers directions. You will need to find your vehicle's OBD II Data Link Connecter (DLC) and connect your scan tool to the DLC, then follow the steps indicated on your scan tool or scan tool manual.

Step 2. Insure ignition switch is OFF. Reconnect the battery 12v positive cable (red wire) to battery terminal (+).

Step 3. Cycle ignition switch to ON position and wait 1 minute, then start your vehicle. Check Engine Light or Service Engine Soon Light should be reset and turned OFF.

Step 4. Drive your vehicle for one week under normal driving conditions. During this period the emissions computer is gathering data and re-learning your vehicle's emissions components and systems. The emissions computer OBDII (on-board diagnostics) system must complete at least one drive cycle (in some cases two or three). A drive cycle is a sequence of internal tests which the emissions computer runs while your vehicle is being driven. This insures all emissions systems are functioning properly. Proper "readiness flags" are set as the computer completes it's cycles. Test cycles are unique to a vehicle. Certain cycles run under very strict parameters, and may require extended driving time to trigger on. Cycle data and readiness flag information is available through your dealership's service department. The data vary widely.

Sep 15, 2014 | 1999 Audi A6

1 Answer

Reset check engine light on 2000 avalon

stop the car and turn it off and don't forget to remove the key. the open the hood and find the battery. Then remove the negative battery terminal connector completely from the battery. with the battery disconnected turn on you headlamps as you would for night time driving. Wait an half an hour so all the current drains out the the electrical system. after the half hour TURN OFF THE HEADLAMPS BEFORE RECONNECTING THE BATTERY! Next reconnect the negative battery terminal connector back on the negative battery terminal don't forget to tighten it down. Put the key in the ignition turn the computer on to on BUT wait 5 seconds before actually starting the car, then start the car as normal and drive the car at least 25 miles 10 city 15 highway so the car can relearn all it functions again **Note first time start the car my be rough due that it need to relearn if it is acting rough apron start up let it idle for a bit before driving so it can calm down**

Oct 03, 2013 | Cars & Trucks

2 Answers

1998 Mitsubishi Diamante stalled while driving

Check timing belt first. Some engines are interference types, such that when belt fails pistons may hit the valves causing major damage. Google search you engine # to see if your is or is not one of these. If non-interference type, you will just need to replace the belt, but most folks also replace the belt tensioner and perhaps water pump if it is also belt driven. You normally buy a kit of all these parts.

Feb 04, 2018 | 1998 Mitsubishi Diamante

1 Answer

2002 Toyota Camry stalls out after i disconnected the battery. It idles rough, rpm's just keep decreasing until it stalls out.

Hello. Welcome to FixYa. Please allow me to assist you.

What you have is this: Disconnecting the battery caused your car's computer to lose its 'base idle' parameters. This info is kept in the computer, but, removing power to the computer allows the info to be erased, so to speak.

This is, unfortunatly, a normal condition, and, easily rectified.

What you need to do: Get in the car, start it up, and drive it; simulating stop/start city traffic, and then take it out on the highway, hit passing gear a few times, pull off, and let it idle 30 seconds and repeat highway speed, and passing gear a few more times, then simulate city traffic again. You might need to apply a slight bit of gas during the idle periods of the drive. If you do it right, you can reset the base idle parameter under10 minutes.

If you have any questions, please feel free to get back to me via reposting.

Thanks for choosing FixYa for assistance today.

Aug 02, 2011 | 2002 Toyota Camry

2 Answers

How would u reset the maintaince required light after you changed the fluids?

Hi there biggryder 12!

The best way to reset the maintenence light after you have resolved the problem is to disconnect the battery.
  1. First disconnect the battery (negative terminal)
  2. Let the disconnected battery sit for at least 15 minutes
  3. After 15 minutes reconnect the negative cable
The reason to leave it disconnected for 15 minutes is to give the capasitors time to fully discharge their charge. If after doing this procedure and your light comes back on you need to check if there is any maintenence procedure that may have been missed or have the codes read.

I hope this was of assistance to you.

Mar 31, 2011 | 1990 Dodge Dakota

1 Answer

Rpm goes up and down when fan turned on

Sounds like the alternater.It is not putting out enough out put.Check with a volt meter conneted to the battery.It should read about 13.75 to 14.25.My guess it is only puting out about 12.5 to 13 volts.Check the battery terminals for a good connection.Be sure the cable ends are shiney and the battery contacts are shiney also.Warning,some new vehicles will loose computer memory when disconnecting the battery,so have some kind of 12 volts to plug into the cig. lighter(if the cig lighter works with key off).This will keep computer memery in tact.After you have done this make sure the alternator has the out put of 13.75 to 14.25 volts while engine is running.With key off,it should read at the battery at least,12.25 to 12.5 volts.If the alternater is not puting out these volts,then replace it.The vehicle can not operate with low voltage,and if you turn something on,such as the blower motor,or ac,or head lights,they draw a lot of amps.This will make the engine stall.I hope this was some help.Let me know if it was.

Oct 06, 2009 | 2003 GMC Envoy Xl

2 Answers

Rough idle

sound slike you may have unplugged or disconnected somethine else or the spark plug you put in is bad or inpropper gap

Sep 03, 2009 | 2002 GMC Envoy

1 Answer

While driving at highway speed, car stalled

You could try to bypass the ignition by turning your key forward and crossing the terminals on the starter. If it starts the ignition is bad if not the starter is

Jun 05, 2009 | 2001 Kia Rio

2 Answers

Won't idle after replacing battery, engine dies.

Hansandfranz is 1/2 correct; the car does need an "Idle Relearn", but, you do NOT need a scan tool for this. The vehicle just needs to be driven for the ECu to relearn the "base idle".
Get in, drive it down the highway. Do some passing gear downshifts. Pull off to the side of the road, let it idle for 30 seconds, repeat 2 more times. Then, try to duplicate some "in-town" (stop & go") driving, for about 15 minutes.
This will reset the "base idle", and your stalling condition will disappear. Expect to have to do this again if you replace the battery. Very common; the Computer (ECU) loses the base idle parameters when the battery is disconnected. Easily rectified just by driving as mentioned above. Feel free to comment back if you have any other questions.

Oct 16, 2008 | 2002 Toyota Camry

2 Answers


I had this same problem, I replaced the gas cap, disconnected the battery to "reboot" the system and it hasn't come on again.

Aug 04, 2008 | 2001 Jeep Grand Cherokee

Not finding what you are looking for?
1993 Jeep Grand Cherokee Logo

340 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

77939 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 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