What solenoids are in the E4OD transmission on this diagram?

Coast clutch solenoid, #2 shift solenoid, torque converter clutch (TCC) solenoid, #1 shift solenoid, and the electronic pressure control (EPC) solenoid, plus a transmission oil temperature sensor.

What powers the E4OD solenoids?

The PCM power relay, fed by a 20A fuse (hot at all times) in the engine compartment fuse box via circuit 37 Y, directs voltage on circuit 361 R (12V relay energized) to the shift, EPC, and TCC solenoids.

What does the transmission oil temperature sensor do?

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

What wire colors connect the transmission to the PCM?

923 O/BK (oil temperature sensor), 924 BR/O (coast clutch solenoid), 315 P/O (#2 shift solenoid), 480 P/Y (TCC solenoid), 237 O/Y (#1 shift solenoid), and 925 W/Y (EPC solenoid).

What do the shift solenoids do?

The shift solenoids provide gear selection of first through fourth gear by controlling the pressure to the shift valves.

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1995 Ford Bronco E4OD Transmission Wiring Diagram - PCM & Solenoids (Pg 30-2)

E4OD transmission wiring diagram page 30-2 with shift solenoids, EPC and TCC solenoid circuits

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Wiring diagram of E4OD transmission shift solenoids, torque converter clutch, electronic pressure control, and oil temp sensor.

AI caption February 2011 · Photo 462 of 1799

This is page 30-2 of a Ford factory-style wiring diagram covering the E4OD automatic transmission electrical circuit, uploaded as part of a 1995 Bronco wiring diagram set. It shows power distribution from the engine compartment fuse box (two 20A fuses — one hot in start or run, one hot at all times) through the PCM power diode and PCM power relay to the transmission solenoids. Circuit numbers and wire colors are shown, including 16 R/LG, 175 BK/Y, 37 Y, 57 BK (ground via S102 to G100), 361 R (12V relay energized), 359 GY/R, 923 O/BK, 924 BR/O, 315 P/O, 480 P/Y, 237 O/Y, and 925 W/Y. Inside the E4OD transmission are the transmission oil temperature sensor, coast clutch solenoid, #2 shift solenoid, torque converter clutch solenoid, #1 shift solenoid, and electronic pressure control (EPC) solenoid, all controlled by the Powertrain Control Module (PCM) at pins 49, 55, 19, 52, 53, 12, 51, and 38 (asterisked pins for 5.0L and 5.8L California). Callouts explain the functions of the temperature sensor, TCC and coast clutch solenoids, EPC solenoid, and shift solenoids. Connectors shown include C103F/C103M, C110F/C110M, C1048, C185, and splices S102, S136, S169.

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Frequently asked questions

What solenoids are in the E4OD transmission on this diagram?: Coast clutch solenoid, #2 shift solenoid, torque converter clutch (TCC) solenoid, #1 shift solenoid, and the electronic pressure control (EPC) solenoid, plus a transmission oil temperature sensor.
What powers the E4OD solenoids?: The PCM power relay, fed by a 20A fuse (hot at all times) in the engine compartment fuse box via circuit 37 Y, directs voltage on circuit 361 R (12V relay energized) to the shift, EPC, and TCC solenoids.
What does the transmission oil temperature sensor do?: The PCM monitors the voltage drop across a temperature sensitive thermistor to determine transmission fluid temperature for adjusting shift schedules, torque converter engagement schedules when the fluid is cold, and EPC pressure for temperature.
What wire colors connect the transmission to the PCM?: 923 O/BK (oil temperature sensor), 924 BR/O (coast clutch solenoid), 315 P/O (#2 shift solenoid), 480 P/Y (TCC solenoid), 237 O/Y (#1 shift solenoid), and 925 W/Y (EPC solenoid).
What do the shift solenoids do?: The shift solenoids provide gear selection of first through fourth gear by controlling the pressure to the shift valves.