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 172 (LANE KEEPING SYSTEM)DIAGNOSIS AND TESTINGLANE KEEPING SYSTEMSYMPTOM CHART(S)
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Symptom Chart(s)
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Symptom Chart(s)
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
| Condition | Possible Causes | Action |
|---|---|---|
| A module does not communicate with the diagnostic scan tool | Fuse Wiring, terminals or connectors Module |
REFER to: Communications Network . |
| The lane keeping alert does not turn on or activate | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| The lane keeping alert does not provide driver feedback once activated | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| The display lines in the IPC do not turn green after the lane keeping alert is turned on | Road conditions |
NOTE:
The display lines are gray when the IPMA cannot detect lane marking(s) on the road in front of the vehicle. VERIFY the road conditions described under System Display. REFER to: Lane Keeping System - System Operation and Component Description . |
| The lane keeping alert provides early feedback on one side of the lane and late feedback on the other side of the lane | Dirty or cracked windshield | CLEAN and INSPECT the windshield in front of the camera. |
| Loose or incorrectly installed interior rear view mirror | INSPECT the interior rear view mirror for proper installation. REFER to: Interior Rear View Mirror . | |
| Camera alignment | Using a diagnostic scan tool, PERFORM the front camera alignment. | |
| Degraded performance from the lane keeping alert system | Dirty or cracked windshield | CLEAN and INSPECT the windshield in front of the camera. |
| Camera alignment | Using a diagnostic scan tool, PERFORM the front camera alignment. | |
| LANE KEEPING SYSTEM MALFUNCTION - SERVICE REQUIRED message in the IPC | SECM concern | RETRIEVE and REPAIR all SECM Diagnostic Trouble Codes (DTCs). REFER to: Power Steering . |
| FRONT CAMERA TEMPORARILY NOT AVAILABLE message in the IPC | Temporary temperature related condition | ALLOW the vehicle to warm up or REMOVE the vehicle from direct sunlight. RECHECK after 10 minutes. |
| FRONT CAMERA LOW VISIBILITY - CLEAN SCREEN message in the IPC | Dirty or cracked windshield | CLEAN and INSPECT the windshield in front of the camera. REPAIR or REPLACE the windshield as necessary if damage is found. |
| Dirt or debris in between the camera and the windshield | CLEAN the area between the front camera and the windshield. | |
| IPMA camera heated windshield element | INSPECT the IPMA camera heated windshield element for damage and DIAGNOSE any IPMA heater Diagnostic Trouble Codes (DTCs) that are present. | |
| FRONT CAMERA MALFUNCTION - SERVICE REQUIRED message in the IPC | Refer to the Pinpoint Test | GO to Pinpoint Test D |
RENDER: 1.0x
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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.