Park Position Detect Switch

The park position detect switch is hardwired to the IPC  through a single signal circuit and is grounded by a separate circuit through the selector lever. The IPC  provides a reference voltage to the park position detect switch. When the selector lever is in PARK (P), the park position detect switch closes to ground, pulling the reference voltage low. When the selector lever is moved out of PARK (P), the park position detect switch opens to ground, sending the reference voltage high to the IPC  .