Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 685 (PASSIVE ANTI-THEFT SYSTEM (PATS) - VEHICLES WITH: PUSH BUTTON START)DESCRIPTION AND OPERATIONPASSIVE ANTI-THEFT SYSTEM (PATS) - SYSTEM OPERATION AND COMPONENT DESCRIPTIONSYSTEM OPERATIONNETWORK MESSAGE CHART
2021 Ford Edge SE, 4WD
Network Message Chart
2021 Ford Edge SE, 4WDSECTION Network Message Chart
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Module Network Input Messages - BCM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| PATS start request target data | PCM | The PCM sends the BCM and the ABS module a challenge request for a valid ID. |
| PATS start request target data | SOBDMC | The SOBDMC (if equipped) sends the BCM a challenge request for a valid ID. |
| RKE data | RTM | The RTM sends the BCM programmed passive key information. |
Module Network Input Messages - IPC
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Vehicle mode | BCM | Used by the IPC to display "No Key Detected" when the START/STOP button is pressed and no programmed key is detected within the vehicle. |
Module Network Input Messages - PCM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| PATS control command | BCM | The response from the BCM supplying the PCM target 1 challenge ID. If the BCM ID response is incorrect, then PATS prevents the vehicle from starting. |
Module Network Input Messages - SOBDMC (if equipped)
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| PATS control command | BCM | The response from the BCM supplying the SOBDMC target 2 challenge ID. If the BCM ID response is incorrect, then PATS prevents the vehicle from starting. |
ABS Module Network Input Messages
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Immobilizer target 1 function | PCM | The immobilizer subtarget function sends a response message to the target 1 challenge message from the PCM. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.