20 Most Recent 2002 Jeep Liberty - Page 3 Questions & Answers

You can fix it very much yourself. Just get an online manual here for like 10-15$ and you need no mechanic. It's one of those manuals people get nowadays to do it yourself.. My nephew use it to repair my car and it's totally repaired now. Here's the website he bought it from. 2002 jeep liberty Very good website

The low pressure switch is just a sense input to the PCM - powertrain control module > Grantit , it is needed for the PCM to know the pressure in the system . But the PCM must energize the compressor clutch relay for the compressor to engage . Finding the compressor clutch relay in the under hood fuse / relay box an testing there would be the best place to start . Pull the relay out of the fuse box , look on the bottom ! You should see four set's of number's ,30 & 87 plus 85 & 86 . 30 & 86 should have B+ voltage . Use a multi-meter to test . 85 goes to pin # 1 connector 3 at the PCM . The PCM supply's a ground here to energize the relay if condition's are right . You could jump pin's 30 & 87 an if the compressor clutch coil is good ,the compressor clutch will engage . Video's on youtube showing how to do these test .

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How is the sensor connected to the engine? I had a 2000 model Pajero which did the same thing. It had to do with the way the sensor was connected to the engine, the hollow bolt they used was aftermarket and didn't let enough oil through to the sensor. So the oil has to warm up first before it can get through to the sensor.

my sister car did the same thing and no lie she replaced the key and it went away. those fob keys are real sensitive even if it is a little bent it needs a replacement

check the bulb watts could be higher rated!

You did not say you replaced your thermostat Change the thermostat. Sometimes new thermostats stick. Test the new one before installing by putting it in hot water and watch to see if it opens or closes.

this is due to a bad bulb socket. they are prone to fail due to melting inside.

a mechanical gauge properly installed using copper line not plastic is a good idea ( plastic gets hard and breaks or melts if it gets hot) do not consider turning off the light or the noise as it will hide a pressure failure remember that the average driver doesn't look at the gauges while driving

Wild guess: fuel pump relay.

check to see if key is still in start spot

wiring from the sensor on the rear diff ? What sensor ? The insturment cluster get's speed info over the PCI bus ( serial data network ) from the PCM - engine computer . The VSS - vehicle speed sensor is located on the transmission . The VSS is a input to the engine computer . Sorry , don't know who told you that . That is not correct . You should have it diagnosed at a qualified repair shop . Your insturment cluster or data network is probably at fault . Does the vehicle shift ok ? The only sensor that mite be on the rear diff ,could be for the ABS ,an that has nothing to do with the speedometer . Have the vehicle checked for DTC'S - diagnostic trouble codes .

The JB fuse under the hood is the power supply for the fuse box inside of the vehicle, if the battery drain goes away when JB fuse is removed is only because you have isolated the interior from the rest of the vehicle. These vehicles have issues with the body harness connector on the drivers side floor. To access the connector remove the rear seat and pull back the carpet, the connector is located directly below the drivers side rear seat bottom. Unscrew the 10mm bolt that holds the connector halves together and inspect for corrosion. If corrosion is present, repair as needed and your battery drain should go away.

You have a bad lifter on #6. Replace it before it wears out the cam lobe.

The control provides ground to the motor through the resistor, so you cannot connect the negative blower terminal to ground-it has to go to the resistor. Put it back that way and let us know if there are still issues.