Ford 4R70W Transmission Wiring Diagram - TFT, TCC, EPC & Shift Solenoids to PCM

This document is one page of a Ford wiring diagram set (page references 25-2, 25-5, 25-7 and 30-1 indicate an EVTM-style manual) covering the 4R70W automatic transmission electrical circuits. It shows power feed circuit 361 (red) from the PCM power relay through splices S123 and S167 to four transmission solenoid/sensor branches, plus circuit 359 (GY/R) to engine controls. Inside the 4R70W transmission box it depicts the Transmission Fluid Temperature (TFT) Sensor, Torque Converter Clutch (TCC) Solenoid, Electronic Pressure Control (EPC) Solenoid, and Shift Solenoids SS1/SS2. Return circuits run through connectors C116F/C116M and C202 to the Powertrain Control Module: 923 O/BK to PCM pin 37, 125 DB/W to pin 54, 925 W/Y to pin 81, 237 O/Y to pin 27, and 315 P/O to pin 1 (via C180). Explanatory callouts describe how the PCM uses the TFT thermistor to adjust shift, TCC and EPC schedules; how the TCC solenoid controls converter clutch apply/release pressure; that the EPC solenoid is a variable-force solenoid regulating line pressure; and that the shift solenoids select first through fourth gears by controlling pressure to shift valves. Useful for diagnosing transmission solenoid circuits, wire colors, circuit numbers, and PCM pin assignments.