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 MANUALSFORD2018EXPEDITION LIMITED, RWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMODULE COMMUNICATIONS NETWORK (1 OF 2)
2018 Ford Expedition Limited, RWD
Module Communications Network (1 Of 2)
2018 Ford Expedition Limited, RWDSECTION Module Communications Network (1 Of 2)
- Description And Operation
- Communications Network - Overview
- Communications Network - System Operation and Component Description
- System Operation
- System Diagram
- Module Network Chart
- Network Termination
- Gateway Module
- High Speed Controller Area Network 1 and 2 (HS-CAN1, HS-CAN2)
- High Speed Controller Area Network 3 (HS-CAN3)
- Medium Speed Controller Area Network (MS-CAN)
- Controller Area Network (CAN) Fault Tolerance
- Fault Tolerance Normal Operation
- CAN Circuits Shorted Together
- CAN (+) Circuit Shorted to Ground
- CAN (-) Circuit Shorted to Ground
- CAN (+) Circuit Shorted to Battery Voltage
- CAN (-) Circuit Shorted to Battery Voltage
- CAN Circuit Signal Corruption
- Controller Area Network (CAN) Multiplex Messages
- Example:
- Communication Message Chart
- System Operation
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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.