My 2002 jeep grand cherokee laredo wull not start shutdown 2 days ago checked all fuses but the ecu fuses don't know how to find them

Gary Queen

• 85 Answers
• Posted on Nov 15, 2008

SOURCE: change water pump

If you have any questions feel free to ask. Let me know if you dont get diagrams(happens sometimes)

Reverse rotation water pump—2.5L and 4.0L engines

1. Before servicing the vehicle, refer to the precautions in the beginning of this manual.
2. Drain the cooling system.
3. Remove or disconnect the following: NOTESome 4.0L engines are equipped with a fan clutch that threads Directly on to the water pump shaft. This fan clutch is equipped with right-hand threads. NOTEDo not store the fan clutch assembly horizontally, silicone may leak into the bearing grease and cause contamination. NOTEOne of the water pump bolts is longer than the others. Note the location for reassembly.
   • Negative battery cable
   • Electric cooling fan connector
   • Accessory drive belt
   • Engine cooling fan and pulley
   • Water pump pulley
   • Power steering pump
   • Lower radiator hose from the water pump
   • Heater hose
   • Water pump and discard the gasket

1. Clean the mating surfaces of all gasket material.
2. Install or connect the following:
   • Water pump using a new gasket. Torque the bolts to 17 ft. lbs. (23 Nm).
   • Heater hose
   • Lower radiator hose
   • Water pump pulley. Torque the bolts to 20 ft. lbs. (27 Nm).
   • Power steering pump
   • Engine cooling fan and shroud. Torque the bolts to 31 inch lbs. (3 Nm).
   • Accessory drive belt
   • Electric cooling fan connector
   • Negative battery cable
3. Fill and bleed the cooling system.
4. Start the engine, check for leaks and repair if necessary.

1. Before servicing the vehicle, refer to the precautions in the beginning of this manual.
2. Drain the cooling system.
3. Remove or disconnect the following:
   • Negative battery cable
   • Fan and clutch assembly from the pump
   • Fan shroud and fan assembly. If you’re reusing the fan clutch, keep it upright to avoid silicone fluid loss!
   • Lower hose
   • Water pump (8 bolts)
4. Installation is the reverse of removal. Tighten the bolts, in sequence, to 40 ft. lbs. (54 Nm). Water pump tightening sequence—3.7L

SOURCE: 2002 jeep cherokee laredo

My 98 Jeep Grand Cherokee had the same problem. Over heated when standing still. Took it to dealer and they could not find any problem with cooling fan. After doing my own investigation I found out that the electric cooling fan would begin to seize up after about 1hr. of operating. (gets hot)

The dealer would look at fan and see that it was running and think its ok. The problem is, it wasn't running fast enough.

I have a relay on the right side of front fender and jumped the fan to stay on with motor off. (must know what your doing). After about 1hr. fan started slowing way down. Returned it to dealer told them what the problem was. They were not smart enough to jump the relay so they put a couple hundred miles on it even though i told them it works OK when moving. Make sure you tell dealer to use the relay to jump.
Replace cooling fan motor. Works great

SOURCE: 2002 wj jeep grand cherokee p1756

The governor pressure sensor is the most likley cause however an inspection of fluid or debris in trans pan would be a good idea to make sure there's nothing excessive in it. Attached is a list of possible causes however the senor would be the most common.

POSSIBLE CAUSES

• Powertrain control module
• 5 volt supply circuit open
• Check transmission fluid level and condition
• GOV press sensor signal circuit shorted to voltage
• GOV press sensor signal circuit shorted to sensor ground
• GOV press sensor signal circuit shorted to ground
• GOV pressure sensor signal circuit open
• Sensor ground circuit open
• GOV press sensor signal circuit shorted to voltage inside transmission
• 5 volt supply circuit open inside transmission
• Intermittent governor pressure solenoid
• Internal transmission problem
• Oil burnt or oil pan has excessive debris
• Other transmission DTC'S
• GOV press sensor signal circuit shorted to sensor ground inside transmission
• Valve body
• GOV press sensor signal circuit shorted to ground inside transmission
• GOV press sensor signal circuit open inside transmission
• GOV press sensor ground circuit open inside transmission
• Governor pressure sensor (high)

SOURCE: 2002 jeep grand cherokee fan not working?????

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.

SOURCE: fuse box diagram for 1995 jeep grand cherokee laredo

look on the net that is where i got mine