Question about 2003 Jeep Grand Cherokee

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Trying to locate TCM. Jeep stalls sometimes when stopped with a clunk.And RPMs increase and fall back to normal and feels like transmission is slipping or going into neutral. thinking it may be TCM. computer went out and was replaced with a reman. unit that was flashed to my vehicle about a yr ago. Had vehicle scanned for codes at Autozone and scanner would not power up. was to;d that computer was not getting power and that might be ECM fuse but cant find that either. Help please.

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  • Jeep Master
  • 12,206 Answers

You don't need to go by auto zone to have codes check ! Chrysler , Dodge and jeep vehicle's can be checked without a scanner ! Turn the key on then off then back on then off again an then on an leave it on . Check in the odometer an it will show P codes ,then it will show done !
What size engine does it have ? 4.0 or 4.7 L
Fuse #17 10 amp located in the junction block powers pin #16 at the DLC . This would power up a scan tool . Not a PCM fuse !
Your vehicle does not have a separate control module for the transmission ,it is part of the PCM - powertrain control module !
Jeep vehicles with stalling an idle going high then low ( surging ) is caused most of the time by a bad TPS - throttle position sensor ! An don't use one from the aftermarket , use factory parts !

Posted on Jun 02, 2017

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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Mikey108
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SOURCE: 1993 Jeep Cherokee Transmission Problem

The TCU is located under the glovebox and I think there is an inline fuse next to it.

Posted on Jan 19, 2009

  • 1 Answer

SOURCE: 1995 jeep grand cherokee transmission does not shift and at times

Replace the Transmissions Control Module (TCM) that mounts on the driver's side firewall. I have had to do this twice with mine. Glad the TCM was under warranty.

Posted on Mar 09, 2009

csmock132
  • 4669 Answers

SOURCE: 2004 Jeep Wrangler - Clunking Noise when shifting out of Park

It could be lash in the differential which is normal, but it could also be a loose u-joint in the driveshaft. Check the rear driveshaft u-joints.

Posted on Mar 12, 2009

  • 6982 Answers

SOURCE: GAUGES GO CRAZY AND SOMETIMES VEHICLE WON'T START

Poor grounding can cause many of the conditions you have listed. When checking power with a volt meter, this goes unnoticed because the meter does not draw enough amperage to cause the bad connection to break contact. Your battery is grounded to the engine block and also has a small lead to the fender. Many components have individual ground leads as well (including most computers) I would check all ground leads and clean the contact surfaces with sandpaper or a wire brush. Adding an additional ground wire is a good idea as well. Don't forget that the dash board frame must also provide a good ground as well.
Many times this is all you need to do...sometimes though, control modules can be damaged because in having a partial ground, they build up heat, due to additional resistance in the circut.
This may or may not cure your problem, but it's worth checking out. Grounding is often overlooked, especially if it has not completely broken down.

Posted on Apr 23, 2009

  • 20 Answers

SOURCE: jeep wrangler bucking

how long has this been happing..one tank of fuel or more, could have been bad gas, replace filter,, put gas dryier in fuel tank..if it continues could possibly be transmission related..the reving down doesn't sound like transmission though if tansmission was slipping it would rev up..good luck

Posted on Jun 02, 2009

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Related Questions:

1 Answer

Why is my 1997 Grand Cherokee Laredo slipping gears when starting up from a stop


slips in reverse too? (other shoe falls off......)
same answer for all a/t slush boxes.
linkage from shifter to box ok?>
check levels first.
check fuses, if TCM acts dead, (wont autoshift)
change the filter,
get it serviced.
if frisky, read the FSM and do the stall tests and the line pressure tests. otherwise get it fixed.

Jun 06, 2016 | 1997 Jeep Grand Cherokee

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Location of TCM


Fault code P700 is not a fault code per say, it is telling you the TCM module has reported to the PCM module that a transmission problem has occurred, it is just an alert. You now need to have the TCM tested by the dealer with a special scanner that can read the TCM. DO NOT REPLACE THE TCM.

Jun 04, 2014 | 1999 Jeep Grand Cherokee

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I have a 2002 Jeep I have a 2002 Jeep Grand Cherokee Laredo v-4. When I am idling at a light, my jeep has shut off about seven times. It starts right back up though. When I am idling and sometimes while...


I have replaced TPS - throttle position sensors on jeeps for this same problem ! Fixed them right up . But use jeep parts , not aftermarket ! Jeep's don't like aftermarket parts .

Jun 02, 2017 | 2002 Jeep Grand Cherokee

1 Answer

Transmission not shifting


its the TCM transmission computer system. there is a computer inside the console shifting unit, one on top of the steering column just behind the carpet. they will tell you to replace the computer. but which one is the issue. replace the small one at the shifter first. then if that doesnt fix it then replace the big one under the dash. the dealer wants 500 for the part alone at the shifter, and 800 for the big one with installation. its easy to install dont pay them for that. instructions are on the internet. you need to take the car back. EVERY GC has transmission electronics problems.

Dec 02, 2009 | 2002 Jeep Grand Cherokee

2 Answers

2000 GMC Jimmy SLT 4wd, 65k miles, baby'd, driven


bad transmission, it will need rebuilding or replacement. sorry....hopefully this helps

Aug 16, 2009 | GMC Jimmy Cars & Trucks

2 Answers

1995 jeep grand cherokee transmission does not shift and at times


Replace the Transmissions Control Module (TCM) that mounts on the driver's side firewall. I have had to do this twice with mine. Glad the TCM was under warranty.

Mar 08, 2009 | 1995 Jeep Grand Cherokee

1 Answer

Transmission skips 3rd gear then gears down into proper gear


no transmission stated, of the 5 possible that year.
find another shop, find ASE rated shop
no DTC, no joy here, why post with the key fact missing?
vague, sure, P0700, is the common vague (means see DTCs from TCM )
that code means your lame shop has a TOY grade scanner
that can't scan all jeep codes, see all TCM errors.
the shop manual lists them all.
its free to read.

x2 grounds.
x2 service it , full flush.
x2, scan it right this time,,,

BTW
some TCM skip gears in LIMP-IN mode.
in failure mode, you need to fully scan the
TCM. it could be valve body, or, TCM doing it on purpose because VSS is funky or other inputs to the TCM are wrong.
if you dont learn all TCM errors, you will never know ,will you?

worst yet, no transmission stated
30RH
32RH
42RE
AW4
44RE (For the big block 5.2L)
NO ENGINE STATE EITHER AS ENGINE AND TRANS MATCH. HELP US SEE WHAT YOU HAVE,


to get help , first learn what you have
then tell that first.

Mar 10, 2017 | 1997 Jeep Grand Cherokee

1 Answer

1999 Volvo S70 Stalls at stop signs and traffic lights


These models had a problem with the electronic control modules, and this is what controls the idle speed. Sometimes they just need to be cleaned, but sometimes they are defective. Volvo has extended the warranty on some of them to 10 years or 200,000 miles if it is found to be defective.

http://repairpal.com/volvo-s70-1999

Jan 05, 2009 | 2000 Volvo S70

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