What fuses power the E4OD transmission circuit in this diagram?

Two 20A fuses in the engine compartment fuse box: one Hot in Start or Run (circuits 16 R/LG and 175 BK/Y) and one Hot at All Times (circuit 37 Y). Power distribution details are on page 13-5.

What solenoids are inside the E4OD transmission?

The Coast Clutch Solenoid, #2 Shift Solenoid, Torque Converter Clutch Solenoid, #1 Shift Solenoid, and the Electronic Pressure Control (EPC) Solenoid, along with a Transmission Oil Temperature Sensor.

What wire colors connect the E4OD solenoids to the PCM?

Circuit 923 O/BK, 924 BR/O, 315 P/O, 480 P/Y, 237 O/Y, and 925 W/Y, passing through connectors C103, C110, C1048, and C185 to the Powertrain Control Module.

What does the E4OD Transmission Oil Temperature Sensor do?

The PCM monitors the voltage drop across the temperature-sensitive thermistor to determine transmission fluid temperature, adjusting shift schedules and torque converter engagement when fluid is cold, and adjusting EPC pressure for temperature.

What does the Electronic Pressure Control (EPC) solenoid do?

It is a variable force type solenoid that regulates transmission line pressure. The PCM power relay directs 12V to it along with the shift and TCC solenoids.

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1994 Ford E4OD Transmission Wiring Diagram (Gasoline) - Solenoids, PCM Circuits

Ford EVTM page 30-2: E4OD gasoline transmission solenoid wiring diagram

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Wiring diagram for the E4OD gasoline transmission detailing shift solenoids, torque converter clutch and electronic pressure control circuits.

AI caption July 2017 · Photo 296 of 386

This document is page 30-2 of a Ford wiring diagram manual covering the E4OD automatic transmission with gasoline engines, marked "94" (1994) and "GASOLINE." It shows the complete electrical circuit for the E4OD transmission: power feeds from the engine compartment fuse box via two 20A fuses (one Hot in Start or Run through circuit 16 R/LG and 175 BK/Y, one Hot at All Times through circuit 37 Y), routing through the PCM Power Diode and PCM Power Relay, which directs 12V (relay energized) via circuits 361 R and 912 W/R to the transmission solenoids. The transmission connector includes the Transmission Oil Temperature Sensor (circuit 359 GY/R, ground 57 BK to G100 via splice S102), Coast Clutch Solenoid, #2 Shift Solenoid, Torque Converter Clutch Solenoid, #1 Shift Solenoid, and Electronic Pressure Control (EPC) Solenoid. Return circuits 923 O/BK, 924 BR/O, 315 P/O, 480 P/Y, 237 O/Y, and 925 W/Y run through connectors C103, C110, C1048, and C185 to the Powertrain Control Module (PCM). Explanatory callouts describe how the PCM uses the temperature sensor, how the TCC and coast clutch solenoids work, how the shift solenoids select gears 1–4, and that the EPC is a variable-force solenoid regulating line pressure. Cross-references point to power distribution (page 13-5), grounds (page 10-1), and PCM pages 23-2, 24-5, 25-2, 26-2.

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Frequently asked questions

What fuses power the E4OD transmission circuit in this diagram?: Two 20A fuses in the engine compartment fuse box: one Hot in Start or Run (circuits 16 R/LG and 175 BK/Y) and one Hot at All Times (circuit 37 Y). Power distribution details are on page 13-5.
What solenoids are inside the E4OD transmission?: The Coast Clutch Solenoid, #2 Shift Solenoid, Torque Converter Clutch Solenoid, #1 Shift Solenoid, and the Electronic Pressure Control (EPC) Solenoid, along with a Transmission Oil Temperature Sensor.
What wire colors connect the E4OD solenoids to the PCM?: Circuit 923 O/BK, 924 BR/O, 315 P/O, 480 P/Y, 237 O/Y, and 925 W/Y, passing through connectors C103, C110, C1048, and C185 to the Powertrain Control Module.
What does the E4OD Transmission Oil Temperature Sensor do?: The PCM monitors the voltage drop across the temperature-sensitive thermistor to determine transmission fluid temperature, adjusting shift schedules and torque converter engagement when fluid is cold, and adjusting EPC pressure for temperature.
What does the Electronic Pressure Control (EPC) solenoid do?: It is a variable force type solenoid that regulates transmission line pressure. The PCM power relay directs 12V to it along with the shift and TCC solenoids.