Normal Operation
The park detect switch is hardwired to the Instrument Panel Cluster (IPC) through a single input circuit and grounded through a separate ground circuit. When the vehicle is in PARK (P), the park detect switch opens. When the vehicle is not in PARK (P), the park detect switch closes, providing a ground to the IPC through the park detect input circuit. The IPC receives the driver door ajar data from the Body Control Module (BCM) over the Medium Speed Controller Area Network (MS-CAN) communication bus. When the ignition is placed in the off mode with the floor shifter out of the PARK (P) position and the driver door open, the IPC sends the Front Control/Display Interface Module (FCDIM) a request over the Controller Area Network (CAN) communication bus to display VEHICLE NOT IN PARK SELECT P in the message center.
- DTC P081C:01 (Park Input Circuit: General Electrical Failure) - an on-demand DTC that sets if the IPC detects an open on the park input circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Park detect switch
- IPC