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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 593 (ELECTRONIC ENGINE CONTROLS - 3.0L POWER STROKE DIESEL)DESCRIPTION AND OPERATIONELECTRONIC ENGINE CONTROLS - SYSTEM OPERATION AND COMPONENT DESCRIPTIONSYSTEM OPERATIONPOWERTRAIN CONTROL HARDWARE
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD

Powertrain Control Hardware

2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Powertrain Control Hardware
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.

Powertrain Control Module (PCM) And Location 

The PCM is the control center for the engine powertrain system. The PCM monitors the information from various sensors, and controls the systems that affect the vehicles performance and emissions. The PCM and the TCM are stand-alone modules. The PCM and the TCM communicate through the CAN. The PCM has a 3 pocket connector assembly with a total of 222 pins. The 74 pin connector is dedicated to chassis related inputs, outputs, powers and grounds. The 98 pin connector is dedicated to engine control related inputs, outputs such as the fuel injectors, camshaft, crankshaft sensors and the turbocharger systems. The 50 pin connector is dedicated to the exhaust aftertreatment components. The PCM receives input from sensors and other electronic components (switches and relays) and places this information into RAM or the EEPROM. Based on information programmed into its ROM, the PCM generates output signals to control various relays, solenoids, and actuators. The PCM controls these output circuits by controlling the ground or the power feed circuit through the transistors or an output driver module.

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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.