Town & Country V6-3.8L VIN L (2006)
Fig. 290 Ignition Key/Switch Positions
The Brake/Transmission Shift Interlock (BTSI) Solenoid prevents the transmission shift lever from being moved out of PARK (P) unless the brake
pedal is applied. The BTSI solenoid is hardwired to and controlled by the Intelligent Power Module (IPM). Battery voltage is applied to one side of
the solenoid with the ignition key is in either the OFF, ON/RUN, or START positions (Fig. 290). The ground side of the solenoid is controlled by a
driver within the IPM. It relies on voltage supplied from the stop lamp switch to the stop lamp sense circuit within the IPM to tell when the brake
pedal is depressed. When the brake pedal is depressed, the ground circuit opens, de-energizing the solenoid. When the brake pedal is released, the
ground circuit is closed, energizing the solenoid.
Fig. 291 Pawl Engaged to Shift Lever