Question about 2002 Jeep Grand Cherokee

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Power windows, computer display panel for temp and fluid level not working

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Do any of the switches in the driver door work (locks, mirrors). If nothing in the door is working, then this is probably your problem. There is a problem with alot of jeeps various year models with a ground wire separating going to the door. To see if this wire is indeed broken, you need to first open the driver door. Inbetween the door and frame, there is a black rubber tube that houses the wiring harness. You'll probably have to work at it because it's in there to be water tight. After you have that slid back, find the connector that is in the middle of that rubber piece. Shine a flashlight in there and on the body side of the connector, you're looking for either the black wire or orange wire. If it's not attached, you've found your problem. It just needs to be repaired with a **** connector or soldered and heat shrink. Do not use scotch locks, if you were thinking about using them, have someone else repair it for you the right way. It will probably take about 20minutes of working at it to get the rubber piece back on after repairing that wire.

Posted on Jun 02, 2011

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Hi. Before you do anything, check the transmission fluid level with engine running and in park. If the fluid is at the right level, there are 2 levels, a cold and a hot level. If the fluid is low then simply add fluid to correct level and check for leaks in hoses,transmission pan, external oil cooler if installed and axel seals. Normally fluid levels will not go down except if there is a leak somewhere. If the fluid smells burned, then you have most likely will need an overhaul as the tranmission has overheated due to high loads (pulling a trailer in hot temps, or simply because of age and the resultant excessive slippage of the friction plates.
However if the fluid level is good and fluid smells ok then gave the computer code read. Your problem could simply be a loose or corroded wire to or from the transmission causing erratic shift symtoms.
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That one has a GM 4l30e transmission. BMW has a shift computer. When it is cold it delays shifting to the final gear running the rpm's up to about 3500.

Change the fluid and filter anyway. Cheapest solution. Don't bring it to an idiot to do either. The larger of the two pans must be removed to access the filter. Then reinstall with a new gasket. run it up to operating temp. and top off the fluid through the side pan fill nut. You know you have the correct level when, at operating temp and the car is level, fluid comes out.

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The 01M needs to be hooked up to a scan tool (VAG 1552) then you'll also need VAG 1924 ATF filler kit or similar.
Procedure:
1) Address word 02- Transmission Electronics
2) Advance to read measuring value blocks -08
3) Select display group -05
4) Observe display field 1 for transmission temperature (must be below 30*C at start)
5) Lift vehicle
6) Place container under trans
7) Bring ATF to test temp (ATF Test temp 35 to 45*C (95 to 113*F)
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note: If the ATF drips out the hole by the time the temp reaches 45*C, fill through the filler tube until fluid comes out of the level checking hole.

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