Where is the TCM located on a 96 Vanden Plas? I received some great help from a fellow Jag owner who was gracious enough to invite to their residence to read the codes: P1775 and P0727.

Thanks Sir! You know who you are....

Carter

 

I checked my service manual CD and find that it's behind the dash on the passenger side. If you stop by I will loan you the CD. I didn't think of it last week.

 

Carter,

Did you have an engine stall? I just typed the following for JohnMRLV who is having "multiple issues" including those codes:

"Whenever the engine stalls while the car is moving, it is "normal" to get those two codes set: P0727 and P1775, along with Transmission Limp mode. None of that necessarily means that there is something wrong, other than your engine stalled! Notice that the Trans light resets itself after a restart, and the codes don't affect operation and can be cleared. So we must look for causes of the engine stall."

"I see you have new spark plugs, and that is important. Old spark plugs will cause random stalling in this engine. The Crankshaft Position Sensor (or CKPS) can fail intermittently and cause stalling. In that case, the P0727 code would be legitimate as a CKPS failure. That part is considered a wear and tear item and it is prudent to replace it after 100k miles. It is located on the front of the engine and reads the toothed wheel on the front pulley. It might be time for a new one. However, it is hard to say for sure if that is the actual cause of the stalling. There could be other problems yet to be uncovered."

So you probably don't have a defective Transmission Control Module!

 

What he said!

 

I get these codes from trans when my engine stalls. If the engine RPMS are too low (below 90 or something along these lines) and the TPS shows throttle open, and the car is moving the TCP has a "WTF?" moment. It defaults to 47% open throttle IIRC. It also illuminates gearbox fault light and stores these codes. They don't mean that there is something wrong with TCM or transmission. Chances are, both gadgets work as expected.

 

thanks Richard and everyone!!!

Carter