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.
1993 Ford E 350 Van V8-7.3L DSLFACTORY OEM SERVICE PROCEDURE
Engine Control Module: Description and Operation
Powertrain Control Module (PCM):
PURPOSE
The Powertrain Control Module (PCM) controls operation of the E4OD automatic transmission. Input sensors provide information to the PCM, which then controls the actuators which affect transmission operation.
OPERATION
The Powertrain Control Module (PCM) monitors inputs from the various input sensors located on or in the engine and transmission. The PCM receives signals from these sensors, makes computations based on these inputs, and regulates the various actuators wich effect transmission operation.
NOTE:
The PCM's calibration assembly contains the information on each vehicle's weight, axle ratio, engine and transmission application.The calibration assembly is an integral part of the PCM and is not replaceable.
Factory Service Tools
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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.