2001 Jeep Grand Cherokee - Page 3 - Answered Questions & Fixed issues

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sounds like the master cylinder is faulty or poss servo also

Make sure the vacuum hose has no leaks, or replace the hose if it looks tatty good luck, a fault finder plug in tool should tell you when plugged in to the cars management socket good luck colin

Have you run an engine control system fault code test? If not do that first.

Check and shiny clean ground wires to body . Main computer may be confused (faulty).

Well fred the thing to do would be to voltage drop test the electrical circuit an test to see how much current is being pulled on the circuit ! Do you own a DVOM - digital volt ohm mete , do you know how to use one ? Also check where the relay plug's into , does the relay box look burnt ? High resistance ! Check to see if the relay fit's tight . . Electric Testing Techniques You Need to Know Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia http://www.bbbind.com/free_tsb.html you can find free wiring diagrams here .

If youre talking about the axle shaft it should be a c clip behind the spider gears

skim lamp come on>? what engine is there, we cant guess engines yet, and that is what stalled the engine there are over 50 causes. a fact. !!! we do 1 to 10 tests and bingo do you want guessing or testing. 1: is the ASD relay dropping out at the instant of the stall. only a scan too can tell you that live., 2: can you save said stall , as it happens with happy right foot actions?/???????? ever get a full tuneup this decade???????????????????????

Check the IAC (idle air control) if its plugged or dirty clean the port with carb cleaner you can find it on the intake under the resonator box its the bottom one the top is the TPS which could also be bad. http://www.wjjeeps.com/engine/throttle_bdy_02.jpg specify which engine it has as well v8 or the 6 because it could be a PCV valve on the oil chute

funny electric sound maybe lock actuator moving-actuator lock rod may have broke or the clip disconnected need to remove doors panel to to service and or repair

2001 no engine stated. sad.welcome to computer shifted gear box.its called a TCMit does all shiftingso scan the PCM and see whyyou cant fix modern cars lacking a scan toolthe engine is misfiring, has 50 causes.it not the transmissiontransmissions can only shift up if the engine makes full power.it's not making full power, fix the engine, EFIscan it. ok? we have posted misfire posts here 100s of time's in fact its endless..short list. full tuneup done.engine gets to 180f and not running cold all the time, scan it to see that. (data scans)ECT reads 180f.? good or above. and holdsECT reads low but thermal gun shows say 180foops ECT is bad.no DTC errors stored?, I bet there are.4.0L coil pack bad? sparks are new you said.fuel pressure way too high.?to scan it , drive to driving cycles.many errors are not reported with just one drive cycle.Misfire, errors, DTC P030x , takes 2 full driving cycles , cold to hot engine, and more rules, read misfire, monitor rules in SM. The engine light starts flashingthat means the EFI system detects gross misfiringthe flashing part means, if you read the opr guide, or SMthat its my damage the CAT converter, due to overheating, it.it says, there, drive easy to service shop.the lamp also means and proves the errors are there stored in the ECU memory called DTC errors.but if you keep doing driving cycles, they can clear , causes this evidence to erase.fools many folks this auto clear features.owning a real scan tool avoids all this , dancing about.

2001 grand cherokee? nor years of all parts swapped. swaps are super complex topics, endless possibles. dont expect magic from any TCM. they cant tell you ever possible way things can be wrong it will fail to shift right if things are wrong, the trans TCM can go to limphome mode, read the service manual chapter 21 yet its free, posted here 300 times. forget the silly engine , light (CEL) use only a scan tool one that can read all factory codes not some $20 tool. CEL lamp is for failing smog. only. never trust it, if out. i say bad shift solinoids. the TCM can see late shift error.s but maybe not all. stick in 1st is a hard failure. all inputs to the TCM must be correct for the shift to 2nd happens. check all inputs. if those are then see if the TCM did shift to 2nd, but the solenoids ignored the logic inputs to the solenoids. solenoids have many failure mods dead. (stuck closed) stuck open, valve open. or leaking. (leaking can cause stuck in 1st and confuse any TCM) leaking means breached, valve leaks where it must not. ever.

delete the whole post. opno scan tool brand stated, nor modelit MUST be J1850 VPW certified(jeep PCI bus)and type, my scan tool is dead,and car runs like crud. (tells all we need to know)OK BIG PROBLEMSall easy to discover , with a voltmeter,ever heard of that?error1, park lockout is law,,and needs working brake lampsto shift out of park .. (usa cars, on a usa forum)seem like the fuse to the cluster are bad.are you blowing lots of fuse/?battery pull and you forget that PCM needs to relearn idle.so.... that was normalbefore working on any complex car, read the service manual firstnot make blunders.? there some that can be tragic.your dealer SUX,!if comm fail,i it can be fuse on pin 16 of DLC connector (scan port)is blownif pin 16 is hot,12vdcthen the comm buss is shorteda real TECh unplugs all comm buss,(CCD,PCI) modules 1 by 1to find how WHO is shorting the buss out. in real computer this is well known,many shops never took the class on networking,find a real ASE shopthat knows jeeps, and networkshis $800 blind guess, suxIF you scan tool plugs in and worksyou'd have seen if he Immbolizer as tripping.with codes just for it, bad key ,bad skim modulehe ASD relays drops and engine is stalled on purpose buy the PCMthe ASD drops for 7 reason or more (ONE IS CMP OTHER IS CKP AND MORE) NO NEED TO GUESS.and the PCM ALWAYS TELLS YOU WHY!READ THIShttp://jeepdied.com/ASD.htmlPOINT 2,IF THE NETWORK IS FAILING!!!! PCI?SO WILL THE CLUSTER!!!!THE CLUSTER IS DATA DISPLAY USING DATA.ITS NOT A OLD SKOOL HAND WIRED, DISPLAY,NOW. ITS A COMPUTER BASED DISPLAYNOT UNLIKE A DESK TOP COMPUTER USES.THIS JEEP USES A PCI BUSS NETWORK.THE PCI BUSS ON CAR, TALKS TO 22 MODULESIN SAID CAR, IVE ONE SHORTS.ALL GO NUTS.JUST LIKE AN OVER TURN GAS TRUCK CROSSWAYSON A FREEWAY, SAME THING,COVERED IN CHAPTER 8W,PAGE 18 SEE IT?learn to use a scan tooland avoid Dodge man like plugue.... find ase shopor real jeep shop.the DLC needs 12vdc on pin 16 this is ALWAYS FIRST.WJ JEEP FREE BOOKhttp://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#serviceSHORTER POST NEXT---------------------------------------------------------------------------------------SCAN TOOL DEAD1`:12vdc power dead on pin 16, dlc, fuse blown for sure.2:comm still fail, one of 22 modules, shorting PCI networkshort and dead accurate.3: USING THE WRONG SCAN TOOL, !!!!!(IDIOTT TECH)here is my 2008 can-busyour page looks just like this in YOUR Serv.man.but is PIC, and is diagnosed same way.http://www.jeepdied.com/pdf%20and%20more/8e-39wk.JPGin my case 29 modules to short. see???????????

why not scan to pcm and see all those TCM errors P07xxx,DTC errors you can NOT fix moderns nor complex a/t trans lacking as scan too hard cold facts. not fun to watch,either OD flashing ,HELP me, get me serviced like 99..9 % do today if you want to learn/ say so. say what you want how to gue$$ or how to tests.? is this not simple.? what to say?

Pressure switch circuit: LR,
this in the tranny

ok no engine stated?if gas engine, ?I bet never tuned-up up in decade,right?> that gets 99% here.but it can be far more complex, not guessing,, what if , the ECT reads wrong.and the PCM thinks you are in ALASKA,and you are in key west,FL..so,it floods cranked. and cold running,same...all EFI cars do that ,everyone, like that.'forget heater (that blow'r motor sucks 15amps and alternator puts that load on the engine, breaking the CAMELS back, for get thatfix MISFIRE COLD that is the problem.!! real.and new spark plugs top that list???? a rich engine needs more spark, and on HILLSand scanning the ECT.does ECT read correctly first thing in morning before starting engineyes ECT can be scanned keyon, not started.correct means if last night was 40f, the ECT is 50f in morningor lower. say 41f.-20f wrong, 0f wrong , got that? not blow average of last nights ambient air temps or garage temps parked. there.the air cleaner can be packed.upthe ISC valve stuck (my 4.0L did that ever 10k miles)most of the cured in 90s with better ISCleaking injectr.misfiring coldand morebest is a tuneup ,pray, and work form there.doing tests.

you used voltmeter at the pump?> or just didnt here it run do say this...please. details, matter.... it told you low fuel is it? is the fuel gauge near "E" why not state that first.? dead gauges, be 1st right, smacks of gross power loss. right>? not clear to me what no gauges means. but the voltmeter is #1 no? did you tests fuse that look ok. fuse that look ok can be bad. no gauges, means all dead, no movement, well the fuel gauge must work , does it, does it match reality? cranks but never runs. good input there. does not run for the jeep 3 seconds.? (ASD rules) no 12vdc power to pump, when cranking,? 01 grand WJ jeep usa. is the skim lamp off, the cluster lamp for SKIM security is first. it must go out after key turn on, or it will never run, ever. I can help. WJ jeep this jeep has a voltage gauge, it must read 12v keyon if not power is lost, or battery low. if cranks that tells me the fues blew. skim cuts spark and fuel, not cranking btw. 2002 cluster http://jeepdied.com/cluster2002GC.JPG see that lamp 12, if stuck on car will never start but will crank. the lamp falses if skim is not working or stays on for ******* key. we SCAN ALL CARS NOW. IF You can not scan a modern jeep then it can near impossible to diagnose (a hard cold fact) IF the ASD fails to work, the PCM tells you every time all 8 ways for it to fail. but that takes a scan tool (any modern scanner works,) http://jeepdied.com/no-start.html

most possible changes will be in the wiring harness and ECM settings you can do the changes and see exactly what the performance differences will be contact your service centre and discuss any foreseeable problems

RTM read this page. spoon fed, 300 times. now. more, click WJ jeep. then click Audio chapter 8a and start reading on page 6 its there, and real. not fake books. note the special tool, on page 5 in that chapter. http://jeepdied.com/pdf%20and%20more/keep-alive.html#radio

Bernard, HVAC failure the car has 2 classes of HVAC< manual and ATC the blower must blow on high.??? does it on high? if not, check fuses, for blower. (if lower speeds only fail say so) the blower is dead, then say if dash controls are Manual or ATC< atc = automatic temp,controls with a dash thermostat et cetra. the diagnostic path is different. the ATC has self test too. .with over 30 errors possible. use comments to respond, not a new post. please.