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 197 (CLIMATE CONTROL SYSTEM - GENERAL INFORMATION (1 OF 2))DESCRIPTION AND OPERATIONCLIMATE CONTROL SYSTEM - VEHICLES WITH: DUAL AUTOMATIC TEMPERATURE CONTROL (DATC) - SYSTEM OPERATION AND COMPONENT DESCRIPTIONNETWORK 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 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.
Module Network Input Messages APIM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Climate control button status | FCIM | This message contains the climate control button status. |
Module Network Input Messages FCIM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Ambient air temperature | PCM | This message contains raw value from the ambient air temperature sensor. |
| Climate control requests | APIM | This message contains both the climate control system voice commands as well as all climate control system touchscreen inputs. |
| A/C clutch status | PCM | This message contains the status of the A/C compressor clutch. |
Module Network Input Messages PCM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| HVAC A/C request | FCIM | This message requests the A/C compressor to be engaged. |
| Evaporator temperature | FCIM | This message contains the evaporator temperature. The PCM uses the evaporator temperature to determine the A/C compressor output. |
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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.