Voltage is available at all times from the BATT2 fuse through CKT 342 (RED) to the ignition switch. When the ignition switch is held in the START position, battery voltage is applied on CKT 5 (YEL) through the CRANK Fuse to the Powertrain Control Module (PCM). At the same time, the PCM grounds the theft deterrent relay control circuit, provided that the theft deterrent module sends, via Class 2 serial data line, a valid start enable password to the PCM and PCM sees a start enable signal from the Internal Mode Switch . The theft deterrent relay coil is grounded on CKT 447 (YEL). The theft deterrent relay contacts close. Power from the BATT1 fuse is applied through CKT 142 (RED), through the relay contacts and through CKT 6 (PPL) to terminal S of the starter solenoid.