Brake transmission shift interlock (BTSI) system

The brake shift interlock solenoid receives power from a high side driver inside the IPM. The high side driver control is hardwired to pin 19 of then IPM C9 connector. The IPM energizes the BTSI when in Accessory, Start or Run positions thus preventing the shift lever from being moved from the Park position. The IPM will de-energize the BTSI solenoid when the brake pedal is applied or the shift lever is in any other position than Park.