What PCM pins control the E4OD solenoids?

PCM pins 37, 53, 1, 54, 27, and 81 connect to the transmission via circuits 923 O/BK, 924 BR/O, 315 P/O, 480 P/Y, 237 O/Y, and 925 W/R.

What powers the E4OD shift solenoids?

The PCM Power Relay directs voltage to the shift solenoids, EPC solenoid, coast clutch solenoid and TCC solenoid over circuit 361 (Red), fed from a 20A fuse (hot at all times) and a 10A fuse (hot in start or run) in the engine compartment fuse box (page 13-5).

What does the transmission fluid temperature sensor do?

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

What is the function of the EPC solenoid on the E4OD?

Per the diagram callout, the Electronic Pressure Control (EPC) Solenoid is a variable force type solenoid that regulates line pressure.

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1996 Ford Bronco E4OD Transmission Controls Wiring Diagram - Solenoids & PCM

96 Bronco 30-2 Transmission Controls (E4OD) wiring diagram: transmission fluid temp sensor, shift/coast/TCC/EPC solenoids, PCM

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E4OD transmission controls wiring diagram for 1996 Ford Bronco showing fluid temperature sensor and shift solenoid circuits.

AI caption July 2017 · Photo 249 of 386

This document is page 30-2 of a 1996 Ford wiring diagram set covering Transmission Controls for the E4OD automatic transmission. It shows power flow from the engine compartment fuse box (a 10A fuse hot in start or run and a 20A fuse hot at all times) through the PCM power diode and PCM power relay to the E4OD transmission solenoids via circuit 361 (Red). The transmission connector detail identifies the Transmission Fluid Temperature Sensor, Coast Clutch Solenoid, #2 Shift Solenoid, Torque Converter Clutch Control Solenoid, #1 Shift Solenoid, and Electronic Pressure Control (EPC) Solenoid, with wire circuit numbers and colors (923 O/BK, 924 BR/O, 315 P/O, 480 P/Y, 237 O/Y, 925 W/R) running to Powertrain Control Module (PCM) pins 37, 53, 1, 54, 27, and 81. Connectors C104B, C103M/C103F, C165, splices S136, S148, S163, S1002 and ground G100 are noted. Explanatory callouts describe how the PCM uses the temperature thermistor for shift scheduling and EPC pressure adjustment, how the shift solenoids provide gears one through four, and that the EPC solenoid is a variable-force solenoid regulating line pressure. Cross-references point to power distribution pages 13-5 and 13-17, grounds page 10-1, and PCM pages 24-3 and 25-2.

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Frequently asked questions

Which solenoids are in the 1996 E4OD transmission connector?: The diagram shows the Coast Clutch Solenoid, #2 Shift Solenoid, Torque Converter Clutch Control Solenoid, #1 Shift Solenoid, and Electronic Pressure Control (EPC) Solenoid, plus the Transmission Fluid Temperature Sensor.
What PCM pins control the E4OD solenoids?: PCM pins 37, 53, 1, 54, 27, and 81 connect to the transmission via circuits 923 O/BK, 924 BR/O, 315 P/O, 480 P/Y, 237 O/Y, and 925 W/R.
What powers the E4OD shift solenoids?: The PCM Power Relay directs voltage to the shift solenoids, EPC solenoid, coast clutch solenoid and TCC solenoid over circuit 361 (Red), fed from a 20A fuse (hot at all times) and a 10A fuse (hot in start or run) in the engine compartment fuse box (page 13-5).
What does the transmission fluid temperature sensor do?: The PCM monitors voltage drop across the temperature-sensitive thermistor to determine transmission fluid temperature, used to adjust shift schedules, torque converter engagement schedules when cold, and EPC pressure.
What is the function of the EPC solenoid on the E4OD?: Per the diagram callout, the Electronic Pressure Control (EPC) Solenoid is a variable force type solenoid that regulates line pressure.