Normal Operation and Fault Conditions

WARNING: This page is about a different car, the 2020 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

On 4x2 vehicles and certain 4x4 vehicles, the drive mode button on the rotary gear shift knob is used to activate and deactivate the selectable drive mode feature. When the driver presses the drive mode button, the GSM sends a voltage signal to the TCM along a dedicated circuit. The TCM sends a drive mode message out on the HS-CAN1. When the GWM receives this message, it is relayed over the HS-CAN2. When the ABS module receives the message, it takes the necessary action depending on the selectable drive mode message.

The drive mode button is located on rotary gear shift knob.

On certain 4x4 vehicles, the ATCM is used to activate and deactivate the selectable drive mode feature. When the driver presses or rotates the ATCM drive mode switch, the ATCM sends a drive mode message out on the HS-CAN2. When the ABS module receives this message, it takes the necessary action depending on the selectable drive mode message.

PPT OB ABS MODULE DTC FAULT SETTING CONDITIONS

DTC	Description	Fault Setting Conditions
P05D3:86	Driver Mode Select Switch 'A' Range/Performance: Signal Invalid	This DTC sets when the selectable drive mode message sent from the ATCM indicates a stuck switch, when the switch has been pressed for longer than 30 seconds, or a general failure of the switch.