2002 Jeep Grand Cherokee - Page 9 - Answered Questions & Fixed issues

double posted, 1st anon. why not read the other post, answered. why not say if the Remote is factory installed, or non factory (Custom) ? that be first.

that is a good one, 2002 GC so ANON. why not read the operators guide first, if that not possible? then why not post a photo of it. red sensor, you meant WARNING lamp right. lamps do not senses. only one clue RED, no icon shape or photos https://www.techauthority.com/en-US/Pages/FacetSearchResults.aspx?make=Jeep&year=2002&model=GRAND+CHEROKEE+LIMITED&engine=4.0L+6+CYL+%28MPI%29&producttype=Owner+Manuals%2c+Kits+and+Accessories&ptCatId=3086 28 possible here pick one and say the name? http://wjjeeps.com/02gauge2.jpg

is this a factory option, we cant guess that. if you dont know then you will need the help of those that have eyes, and can see what is there, i cant./ on a stock car, use the scan tool (USA) the factory system is disabled for many reasons all for safety, like idle controls bad, doors not locked and a long list of limphome rules. READ THE FSM.

Make sure its In park . Recharge battery first

Hi, In the future, PLEASE tell us which engine you have as it makes an EXTREME difference in where to tell you to go / what to tell you to do. If the check engine light is on, going to a local parts store and having the codes pulled (and posting them here) helps too. That said, since you didn't tell us, I will ASSUME that you have the 4.0 I-6 as this is a rather common failing for those engines. What you are having trouble with is called the Crank Position Sensor. This is a little hall effect sensor (magnetic sensor) that mounts in the transmission bell housing, pointed at the flywheel (or flex plate if you have an automatic trans). What it does is pulse every time the timing teeth pass by it. This pulse is fed to the ECU. The ECU uses this signal to time the pulses to fuel injectors (no pulse = no fuel injected). In some years, it also uses it to compare with Cam Position Sensor to ensure accurate spark timing. When it goes bad, it slowly gets worse and worse until the ECU just cant pickup the pulses anymore. It is at this point when your engine will seem like there is nothing wrong, usually will not set the check engine light, but none the less just will not start... Sometimes it will start and run for a few sec, min, or hours and then just stop -- mine did it right in the middle of the freeway once. Talk about an interesting ride! If you want to test this, open the hood and look down at the top of the transmission bell housing (the large part where it bolts to the engine) on the drivers side. You are looking for a small black sensor with a wire coming up out of it. Follow the wire until you find the connector. Unplug it. Get a voltmeter (or multimeter), set it to AC VOLTS (use a low scale) and connect your probes to the contacts in the connector ON THE SENSOR SIDE, NOT THE CAR SIDE. Have someone else crank the engine. Dont worry, it positively will not start with this sensor disconnected. It should read 0.5 to 0.8 volts when cranking. If it reads less, you have found your problem. If you need more help with this, or want pictures and etc.. go to a search page, such as google, and search for testing jeep cps. There is a wealth of knowledge out there freely availble to a simple search. Hope this helps, please let me know if I can answer any more questions for you! : o )

what does RESET mean, do say.? the SKIM resets every time you turn ignition off. why not (pray tell) post a symptom and not try to guess fixes. ? car dont start car starts runs for 2-3 seconds and dies. what./ SKIM light glowing well , it will if SKIM is upset (Immoblizer ) the next steps are) 1: check all fuses. 2; and scan the PCM at the 16pin female jack a knees. an innova 3160 is a nice tool own. if lacking car repair tools why hot get car serviced. if car will not move, call a tow. to any ASE shop. the scan tool will tell you why engine will not start (if can crank) it will. this year car has EXTENSIVE PCM diagnostics, (lots of DTCs) P1685 (6/7)? (skim key wrong)???? you can pull the SKIM fuse #7 and 22 (cab box, not PDC) this kills PCM and skim. (no power)

bypass as in HACK? you cant, old cars yes, but not newer. by design. and law. this IMMOblizer, (called by jeep. SKIM) http://www.fixkick.com/Jeeps/SKIM.html FSM read the FSM book yet on 2002? chapter on SKIM. http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service chapter 8E, electronic modules. page 21. read that page first . it answers why. see secret key code and pin, good luck hacking that. The skim module blocks the ASD relay (stalls engine) scanning the PCM with any scan tool it will show, why. SKIM key wrong, or ? and with that error the ASD drops and the scan tool tells you that. so, that means you need to make the SKIM happy. hacking it , ill not cover, but good luck, its not easy and in most cases impossible. and if you continue to hack away, the PCM sees that and bricks it self and other modules on the bus as punishments. good luck hacking.

Check for fuse and the power to ignition switch

2002?

1. just the noise maker,? doors.
2. or Immobilizer.

do say what you don't want active, or not.? ps: you wont kill the immo, sorry. but the noise maker is covered in your, operators guide, (under how to arm alarm ,seen in index page) my jeeps are 100% silent, alarms are useless. and annoying to all..

if you put some super glue gel on a small cane you should be connect to the window and assit it up the glue will come off quite easy afterwards

Check fuel lines,there is three of them,check fuel cap and more.

Lock and Un-lock the rear tailgate twice in quick succession.

CODE P240D MANIFOLD ABSOLUTE PRESSURE SENSOR

run the fault codes to check for sensor problems.

If the flipup glas can still be opened with the button after locking the car, then the problem is with the limit switch in the tailgate lock motor.

Best online resource for help with your Jeep is at this link. Allpar Dodge Chrysler Plymouth Jeep and related cars minivans and trucks

look for the braided insulation on firewall drivers side

on the fuel rail their is a scrator valve with a black cap on it. an r 12 ac hose will fit on it.

check for blown bulbs on your blinkers first all of them.

It is possible the heater blower motor is fried...causing the open circuit.