Pinpoint Test AJ: The Shift To Park Message Is Inoperative/Always On: Notes

Pinpoint Test AJ: The SHIFT TO PARK Message Is Inoperative/Always On 

Refer to Wiring Diagrams Shift Interlock , for schematic and connector information.

Refer to Wiring Diagrams Instrument Panel Cluster for schematic and connector information.

Normal Operation 

The Instrument Panel Cluster (IPC) displays SHIFT TO PARK when the vehicle is turned off with the shifter out of the PARK (P) position or when the ignition is ON with the shifter out of park and the driver door is ajar or open on vehicles with Intelligent Access (IA). The IPC provides a reference voltage to the park detect switch through the park detect signal, or input circuit. The IPC provides the transaxle park status to the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN).

When the selector lever is out of the PARK (P) position, the park detect switch remains open to ground leaving the reference voltage high to the IPC. The IPC sends a park status message to the BCM, indicating that the selector lever is not in PARK (P). The BCM monitors the ignition state and when the ignition is OFF with the selector lever out of PARK (P), the BCM sends the IPC a shift to park message request.

This pinpoint test is intended to diagnose the following: 

• PRNDL display concern
• Wiring, terminals or connectors
• Park detect switch (part of the selector lever)
• BCM