PRNDL Indicator
The IPC uses the following messages to control the PRNDL:
- Transmission gear display
- Transmission shift mode display
- Vehicle speed
- Life cycle mode
The IPC receives the transmission gear display, transmission shift mode display and vehicle speed messages from the GWM over the High Speed Controller Area Network 3 (HS3-CAN). The GWM receives the transmission gear display, transmission shift mode display and vehicle speed messages from the PCM over the High Speed Controller Area Network 1 (HS1-CAN).
The IPC receives the life cycle mode message from the GWM over the High Speed Controller Area Network 3 (HS3-CAN). The GWM receives the life cycle mode message from the BCM over the High Speed Controller Area Network 1 (HS1-CAN). When the vehicle is in transport mode, the PRNDL is not displayed upon entry or exit from the vehicle to prevent battery drain during longer periods of time when the vehicle is not in use, such as those experienced during vehicle transport.
The IPC also uses a park position detect switch (part of the selector lever) input to signal the IPC the shift lever is fully seated in the PARK (P) position. The IPC compares the park position detect switch input with the transmission gear display message sent from the PCM.