20 Most Recent 2002 Jeep Grand Cherokee Questions & Answers


Check rubber brake hose at caliper and replace if defective.

2002 Jeep Grand... | Answered on Nov 01, 2019


Did you ever find solution to this problem? Same exact thing with my 1999 4.7L.

2002 Jeep Grand... | Answered on May 20, 2019


Check to see if you have coolant in cylinder #3 by taking out the plug and looking at the tip.

2002 Jeep Grand... | Answered on Apr 25, 2019


Try cleaning the throttle body by spraying a throttle cleaner into the throttle body.

2002 Jeep Grand... | Answered on Apr 22, 2019


my guess, A/T tranny car.........?????
dies it jumper cable jump start off a running car.?
yes, battery bad, battery not charged or charging system in car bad.
no, then will the gear shift, or start in neutral.
do 1 to 6.
http://www.fixkick.com/nocrank.html#tricks

7 & 8 is m/T cars. they start 3 ways.

2002 Jeep Grand... | Answered on Apr 13, 2019


I will post it in 2 different posts because its too long DB

HEATED SEAT SYSTEM
Individually controlled driver and passenger side electrically heated front seats are available factoryinstalled optional equipment on this model, when it is also equipped with the power seat option. The heated seat system allows both the driver and the front seat passenger the option to select one of two seat heating ranges, Low or High, or to turn the individual seat heaters OFF using the heated seat switches located in the center lower bezel near the bottom of the instrument panel center stack. The heated seat switch circuit operates on ignition switched battery current supplied through a fuse in the junction block, only when the ignition switch is in the ON position.

The heated seat system consists of the following components
  • Heated seat elements
  • Heated seat sensors
  • Heated seat module (or memory heated seat module)
  • Heated seat switches.
The heated seat system also relies upon resources shared with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) data bus network. The PCI data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, internal controller hardware, and component sensor current loads. At the same time, this system provides increased reliability enhanced diagnostics, and allows the addition of many new feature capabilities. For diagnosis of these electronic modules or of the PCI data bus network, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended.

The electronic modules that may affect heated seat system operation are as follows:
  • Body Control Module (BCM) - Refer to Body Control Module in Electronic Control Modules for more information.
  • Heated Seat Module (HSM) - Refer to Heated Seat Module in Electronic Control Modules for more information.
  • Memory Heated Seat Module (MHSM) - If the vehicle is equipped with the Memory System, refer to Memory Seat Module in Electronic Control Modules for more information.
Refer to Power Seats Premium I/III in the Contents of Wiring Diagrams for complete circuit diagrams. Following are general descriptions of the major components in the heated seat system.

The heated seat system will only operate when the ignition switch is in the ON position, and the surface temperature at the front seat heating element sensors is below the designed temperature set points of the system. The heated seat system will not operate in ambient temperatures greater than about 41 °C (105 °F) . The front seat heating elements and sensors are hard wired to the Heated Seat Module (HSM) or the Memory Heated Seat Module (MHSM).

The heated seat switches are hard wired to the Body Control Module (BCM). The BCM monitors the heated seat switch inputs, then sends heated seat switch status messages to the HSM or MHSM over the Programmable Communications Interface (PCI) data bus. The HSM or MHSM contains the control logic for the heated seat system. The HSM or MHSM responds to the heated seat switch status messages, ignition switch status messages, and the front seat heating element sensor inputs by controlling the output to the front seat heating elements through integral solid-state relays.

When a seat heater is turned ON, the sensor located on the seat cushion electric heater element provides the HSM or MHSM with an input indicating the surface temperature of the seat cushion. If the surface temperature input is below the temperature set point for the selected Low or High heated seat switch position, the HSM or MHSM energizes the integral solid-state relay, which supplies battery current to the heating elements in the seat cushion and back. When the sensor input indicates the correct temperature set point has been achieved, the HSM or MHSM de-energizes the solid-state relay. The HSM or MHSM will continue to cycle the solid-state relay as needed to maintain the temperature set point.

The HSM or MHSM and the seat heater elements operate on non-switched battery current supplied through the power seat circuit breaker in the junction block. However, the HSM or MHSM will automatically turn OFF the heating elements if it detects an open or short in the sensor circuit, a short or open in the heating element circuit causing an excessive current draw, or when the ignition switch is turned to the OFF position.

See the owner's manual in the vehicle glove box for more information on the features, use and operation of the heated seat system.

I WILL POST THE REST

2002 Jeep Grand... | Answered on Mar 23, 2019


p0340 cam shaft position sensor malfunction,P0700 Transmission Control System Malfunction, P0703 Torque Converter/Brake Switch B Circuit Malfunction,
P1652 P 1 6 5 2 OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Fuel And Air Metering O2 Sensor Heater Circuit Malfunction Turbocharger Boost Sensor A Circuit Low Crankshaft Position Sensor A Circuit Low Input

2002 Jeep Grand... | Answered on Feb 06, 2019


You may have to disconnect the battery and let the computer go through a "boot up". Leave it disconnected for about five minutes or more.

2002 Jeep Grand... | Answered on Dec 05, 2018


Replace the fan relay switch. The dealer will charge you 400 to pull the bumper off, or you can buy the part for 45 and cut the hole in the plastic near the passenger headlight assembly and replace it yourself. There are instructions for this procedure on the web somewhere. I have had this problem more than once with my 02 GC V6.

2002 Jeep Grand... | Answered on Nov 18, 2018


I would check the transmission fluid level and color, should be a nice clear red color. You may need to have the filter replaced. Possibly some internal transmission problem also.

2002 Jeep Grand... | Answered on Oct 09, 2018


Its a matter of taking each component out of the picture(unplug ,if possible) one at a time and replace fuse..But before i did i would pull the fuse box far enough out to check for burnt or pinched wires behind it...Good Luck!!!!

2002 Jeep Grand... | Answered on Aug 09, 2018


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.

2002 Jeep Grand... | Answered on Apr 05, 2018


It's 20A FUSE 9 in the junction block.

2002 Jeep Grand... | Answered on Mar 29, 2018


you will get your solution and all info on service info, repair info, parts info, wiring/electrical/fuse diagrams, error/fault codes, torque specs, PCV, owner's/service/repair/parts/maintenance manuals etc everything
this website www.reliable-store.com
it's a very god website for vehicle problems even as old as my 1991 ford

2002 Jeep Grand... | Answered on Mar 20, 2018


Hi,
I've not come across that particular symbol before, but anything showing a key is usually about the ignition systems.
Since it's not starting, my guess would be that your key isn't disarming the immobiliser.?
Have you got another key for that vehicle which you could try instead.?
Best of luck.

2002 Jeep Grand... | Answered on Mar 10, 2018


the lights began flashing intermittently on and off ???? . Wouldn't be a relay problem , a stuck relay the light's would be on all the time , wouldn't be able to shut them off . I would think a control module or secruity system . The BCM - body control module controls the lights . The Headlamp switch is a input to the BCM , the BCM does energize relays to turn on the lights . More then likely the automatic headlamp light sensor which is an input to the BCM could be the problem . Taking the vehicle to a qualified repair shop an having the BCM checked for DTC'S - diagnostic trouble codes is your best bet , Don't take it to autozone , advance etc... as they can not access these codes .

2002 Jeep Grand... | Answered on Feb 21, 2018


I don't understand what you mean this must be an automatic transmission what is first .
If so and the transmission fluid looks OK
First is drive dose the 4 wheel work
So you can't drive the vehicle in forward motion .
Neutral reverse and park at best can make go backwards .
The good news is it dosen't sound like the tranny is shot do you have other electrical problems or it also could be a linkage problem if cable or VACUUM operated .

2002 Jeep Grand... | Answered on Feb 21, 2018

Not finding what you are looking for?
2002 Jeep Grand Cherokee Logo

3,520 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

Top Jeep Experts

Marvin
Marvin

Level 3 Expert

85206 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 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

View Most Popular

Grand Cherokee Jeep

  • Grand Cherokee Jeep

Most Popular Question

2002 grand cherokee limited 4 7l tranny

  • Cars & Trucks
Loading...