PRNDL Indicator

The IPC  uses transmission gear messages, vehicle speed and transport mode messages to control the PRNDL. The IPC  receives the transmission gear display actual and transmission gear display status messages from the BCM  over the Medium Speed Controller Area Network (MS-CAN). The BCM  receives the transmission gear display actual and transmission gear display status messages from the GWM  over the High Speed Controller Area Network (HS-CAN). The GWM  receives the transmission gear display actual and transmission gear display status messages from the PCM  over the Electric Vehicle (EV) High Speed Controller Area Network (HS-CAN).

The IPC  receives the vehicle speed data from the BCM  over the Medium Speed Controller Area Network (MS-CAN). The BCM  receives the vehicle speed message from the GWM  over the High Speed Controller Area Network (HS-CAN). The GWM  receives the vehicle speed data from the ABS  module over the Electric Vehicle (EV) High Speed Controller Area Network (HS-CAN). The ABS  module uses tire size stored in the vehicle configuration file along with wheel speed inputs to generate a vehicle speed signal.

The IPC  receives the transport mode message from the BCM  over the Medium Speed Controller Area Network (MS-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 mode display message sent from the PCM  .

The IPC  provides a reference voltage to the park position detect switch. When the selector lever is in PARK (P), the brake shift indicator opens the circuit to ground and the IPC  detects the high reference voltage. When the selector lever is moved out of PARK (P), the park position detect switch closes to ground, pulling the reference voltage low to the IPC  .