System inputs

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 Jaguar S-Type, 2007 Jaguar S-Type, 2006 Jaguar S-Type, 2005 Jaguar S-Type, and 2004 Jaguar S-Type. However, it is still accessible from the selected car via links, so may be relevant.

The TCM uses the permanent voltages supply to support and to maintain data in the random access memory (RAM).

The Term. 15 input is used to wake up the TCM. Once awake the TCM commences its initialization sequence. This input is not a power supply input to the TCM. For initialization to commence the ignition must be switched to the "II2" position and Vbat above 7V but below 16V (30ms after term. 15 signal on, the initialization of the TCM starts). Initialization time is 500ms max. When initialization is finished, the Drive Program is started and TCM has full functionality.

The TCM has one internal solenoid ground for all internal solenoids (SV and PR).

This internal input acts as the ground for position switch. The TCM requires two vehicle ground supplies. (Term.31). Both ground wires are linked to one grounding point on the vehicle. The TCM incorporates polarity reversal protection.