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Home >> Ford >> 2021 >> Expedition MAX Limited, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Passive Anti-Theft System (Pats) - Vehicles Without: Keyless Entry And Push Button Start >> Description And Operation >> Passive Anti-Theft System (PATS) - System Operation and Component Description >> System Operation >> Network Message Chart
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Network Message Chart

Module Network Input Messages - BCM 

Broadcast Message Originating Module Message Purpose
PATS status enable/disable target data PCM The PCM sends the BCM a challenge request for a valid ID.
PATS start request target data PCM The PCM sends the BCM a challenge request for a valid ID.

Module Network Input Messages - PCM 

Broadcast Message Originating Module Message Purpose
PATS start request target data BCM The response from the BCM supplying the PCM challenge ID. If the BCM ID response is correct, the vehicle is allowed to start.
PATS control command BCM The response from the BCM supplying the PCM challenge ID. If the BCM ID response is incorrect, then PATS prevents the vehicle from starting.
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