SOURCE: 94 jeep grand cherokee will not shift into overdrive
My 97 Jeep Grand Cherokee was doing the same thing. I changed the TPS ( Throttle Position Sensor) Now it is great goes into overdrive fine. It is really easy to change.
SOURCE: radiator fan not working replaced relay,temp
You didn’t mention replacing the temperature sensor located
on the block in the path of the ‘cooled’ coolant.
I can’t tell you any closer where to look for it since you
didn’t specify which engine you have.
This device is a solid state item called a thermistor.
With the air temperature around 77 degrees F and a 'cold' engine, it should
measure about 10,000 Ohms and hot, around 1,200 Ohms while disconnected from
its mating connector.
With the ignition on, and the connector disconnected from
the sensor, you should measure about 5 volts coming from the ECU.
If this has failed, the ECU is not getting the right info
back from the sensor and doesn’t know if the fan is needed or not.
SOURCE: 2001 Jeep Grand Cherokee Laredo radiator fan doesn't turn on.
Check power to the relay. it can close, but if there is no power to it, it can't send anything to the fan.
signal goes from sensor, to the computer, to the relay. when it closes it transfers power from the hot side to the fan.
SOURCE: 1999 Jeep Cherokee sport/air vents do not blow out cold or hot while it is on
this sounds like the recirculation door in the heater box is broken and this is a difficult and can be an expensive repair as the dash has to be removed for access. a quick check for this is if you release the glove box and let it hang you will see the heater box if you reach up to the left top you will feel a grid and the recirc flap is housed there you can operate the blower and hot and cold and see if flap moves
SOURCE: where is the thermostat sensor
6Cyl?? 8cyl?? There is no "thermostat sensor" the PCM turns the fan on using engine temp sensor. Most likely the fan relay is bad. Its located under the right headlight. Its a real PITA to replace.
39 views
Usually answered in minutes!
×