Question about 2003 Jeep Grand Cherokee
OD , id OD'd? LOL !!!!
please do explain, dont work.
it never engages
or lamp flashes (some early cars , flash it for failure)
The PCM on most 99 cars controls the engine and tranny all in one box. and can do many things, wrong, to cause OD to fail
even Limphome, mode. (btw tranny has its own limp mode too)
why not scan the PCM and pull out the DTCs for tranny
that be first.
the PCM will in fact skip OD (top gear) if it thinks it will overload
the engine or tranny is malfing. (slipping and other checks)
the newer the car , the more of that protection is going on....
saving car from driver actions.
Posted on Dec 26, 2013
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Posted on Jan 02, 2017
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.
Posted on Feb 11, 2009
oil pressure problem should be checked independently of other problems...Use a good accurate mechanical gauge to check. If pressure is good (no less than 15psi at idle hot (I prefer to see at least 20) check dash grounding, block ground and if OK, change sending unit. Dash and body ground can influence operation of shift and body control modules so indirectly your problem may or may not be related, depending upon what you find while testing. And it could turn out to be a defective module! They are expensive and just plugging new ones in may work, but then again, it might not. I might be totally incorrect on this...that's the value of actually being there instead of doing this by "remote control".
If you read the numerous posts pertaining to all vehicles, you will see that you are not alone with electrical problems...As long as the engineers who design this stuff, keep using "modules" to replace ordinary simple and reliable systems, we will continue to have these problems. Do some testing and I'm sure you will find a solution! (I'm still waiting for someone to make a program for a PC that will give a complete readout of every system in a vehicle, including exact faults instead of general system "suggestions")
Posted on Apr 07, 2009
The tail lights and the brake/turn lights use the same bulb but, there is 2 filamants in the bulb. One for tail lights and one for brake/turn lights. So just because the brake lights and turn signals work doesn't mean the bulbs are good. If bulbs are good you can check to see if there is power getting to the tail light assy's by unplugging the connector at the assy and using a test light probe the connector (harness side) with the headlights on. If you are getting power to the assy the test light will light. To make sure, turn off the headlights and test light will go off. Hope this is helpful. Good luck.
Posted on May 29, 2009
P0700 means there is a transmission fault code in the transmission controller. Since the transmission controller doesn't have a light attached, it tells the engine controller to turn the light on using this code. You'll have to access the transmission controller to further diagnose the problem.
Posted on Jun 14, 2009
There are two parts to it, a voltage resistor, and the EL panel itself.
You need to remove the console first. There are 2 screws under the front rubber pad, two under the cup holder, two in the bin. Remove those six first, take the storage bin out, then slide the rear cupholder out, remove the two screws under the cup holder, and one in front of it.
There are a total of 6 flat screws, and 3 self tapping screws you have removed.
Put the parking brake on, shift the tranny to N, and the transfer case to the middle position if equipped.
Remove the entire console. Slide the shifter beezel as far up vertically as you can. There are 4 clips you ned to remove to do it.
You will see a blue and black wire running into the back. Follow those wires to the resistor. You will see a transparent EL panel attatched to the resistor by two clips.
Usually, one or both of these clips has come loose, causing the light to work intermittantly. Clip them back on, and turn on the headlights to confirm that the light works correctly now.
Re-install everything in the opposite order.
Posted on Oct 11, 2009
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