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2004 Grand Cherokee no TCC engagement
09-22-2013, 10:19 AM
Post: #5
RE: 2004 Grand Cherokee no TCC engagement
I have been out of transmission Repairing/Rebuilding for so many years that I can’t remember all the details. I can say that the Modis should be a good tool to do everything you will need.

One thing that many people miss when trying to diagnose a “No Command” problem is, “What are some of the ‘simple’ things that could stop the command?” Most vehicles won’t command the torque on until they up to temperature, as Rupe mentioned. Another thing could be the brake light switch. If the lights are on or the computer reads a closed brake circuit you won’t have lock up. You should be able to check that with the Modis. (Click “Brake Light State” in the custom data stream section.) Most won’t lock up until they reach 45mph so you should check all of the speed sensors to be sure that the computer is receiving the proper data. (Click any speed sensor data; ISS, OSS, RF Wheel SS, etc. in the custom data stream.

Other than that I remember replacing many Transmission Pressure Sensors & Pressure Regulators on the 42RE’s. They usually set a code though. We used to get books through “Transtech” & “Transtar” that broke everything down very well. If I can find information on them I will post back later.

Please keep us updated as to what you find.

Thanks for using the forum,

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RE: 2004 Grand Cherokee no TCC engagement - Garner - 09-22-2013 10:19 AM

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