Ford Explorer: Pedestrian Alert System / Description and Operation - Pedestrian Alert System - System Operation and Component Description

Ford Explorer 2020-2021 Service Manual / Electrical / Instrumentation and Warning Systems / Pedestrian Alert System / Description and Operation - Pedestrian Alert System - System Operation and Component Description

System Operation

System Diagram

Item	Description
1	PACM
2	PCM
3	IPC
4	Rear sounder
5	BCM
6	SOBDMC
7	Front sounder

Network Message Charts

Module Network Input Messages - PACM

Broadcast Message	Originating Module	Message Purpose
Factory mode	BCM	Controls the pedestrian alert system based on the vehicle build status set in factory mode.
Ignition status	BCM	Ignition RUN, START and accessory states required for the PACM operating modes and fault reporting.
Power pack status	SOBDMC	Determines the HEV operational state.
Reverse gear state	PCM	Determines reverse gear state.
Transport mode	BCM	Controls the pedestrian alert system based on the vehicle build status set in transport mode.
Vehicle speed	PCM	Engages the sounder between 0-30 km/h (0-8 mph).

Module Network Input Messages - IPC

Broadcast Message	Originating Module	Message Purpose
Pedestrian alert fault	PACM	Displays the pedestrian sounder fault warning message.

Pedestrian Alert System

The pedestrian alert system provides an audible alert when the vehicle is moving in forward or reverse between 0-30 km/h (0-8 mph). The PACM receives all network messages required to operate the system over the HS-CAN1.

In the event of a system fault, the IPC message center displays the Pedestrian Alert Fault Service Now warning message in the message center. The IPC receives the pedestrian alert fault message from the GWM over the HS-CAN3. The GWM receives the pedestrain alert fault message from the PACM over the HS-CAN1.

Component Description

PACM

The PACM controls the pedestrian alert system and is capable of setting Diagnostic Trouble Codes (DTCs) when a fault condition is detected. The PACM requires PMI when replaced.

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