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 MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 604 (LANE KEEPING SYSTEM)DESCRIPTION AND OPERATIONLANE KEEPING SYSTEM - SYSTEM OPERATION AND COMPONENT DESCRIPTIONSYSTEM OPERATIONNETWORK MESSAGE CHART
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Network Message Chart
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION 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 - IPMA
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Ambient air temperature filtered | PCM | Used to control the camera windshield defrost heater operation. The IPMA may turn the heater on when the ambient temperature is below 41°F (5°C). |
| Lane keep assist hands off status | PSCM | Used to determine if a driver's hands are on the steering wheel when the lane keeping aid system is active. If a hands off condition is detected, the driver will be alerted via the message center. |
| Ignition key type | BCM | Prevents the lane keeping system from being disabled when a MyKey® is in use. |
| Ignition status | BCM | Enables and disables the IPMA based on the ignition switch position. |
| Lane keeping system suppression | PSCM | Disables the lane keeping system in the event of an evasive steering maneuver by the driver. |
| Personalization mode | APIM | Used to configure the personalized options for the lane keeping system (mode and intensity). |
| Restraint impact event status | RCM | Disables the lane keeping system when a RCM event occurs. |
| Turn signal switch status | SCCM | When the turn signal is activated, this message is used to suppress the lane keeping on the side of the vehicle corresponding the turn signal direction. |
| Trailer lamp connected | TRM | Provides the current trailer connection status to the IPMA. |
| Vehicle yaw rate | ABS | Disables the lane keeping system in the event that the yaw rate of the vehicle exceeds a predetermined threshold. |
| Vehicle lateral acceleration | RCM | Disables the lane keeping system in the event that the lateral acceleration of the vehicle exceeds a predetermined threshold. |
| Vehicle longitudinal acceleration | RCM | Disables the lane keeping system in the event that the longitudinal acceleration of the vehicle exceeds a predetermined threshold. |
| Vehicle speed | PCM | The lane keeping system is only active when the vehicle speed is above 64 km/h (40 mph). |
Module Network Input Messages - PSCM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Calculated steering angle | IPMA | Provides a reference steering angle for PSCM intervention. |
| Lane keeping alert request | IPMA | Request to provide haptic feedback (vibration) through the steering wheel to alert the driver of a lane departure. |
| Lane keeping aid request | IPMA | Request for steering torque when a lane departure is detected and the lane keeping aid is on. |
| Lane keeping system status | IPMA | Used to provide the lane keeping system status (suppressed, available and active states). |
| Road curvature | IPMA | Provides road curvature as detected by the camera. Used to calculate required steering torque for lane keeping aid interventions. |
Module Network Input Messages - IPC
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Camera status | IPMA | Used to display camera status messages. |
| Lane keep assist hands off | IPMA | Used to display a hands off warning message and sounds a chime through the audio system. |
| Lane keeping system switch status | IPMA | Used to display the lane keeping system status (suppressed, available and active states). |
| Lane keeping system status display | IPMA | Turns the lane keeping aid system display on and off. |
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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.