What resistance should E4OD shift solenoids A and B read?

Per the Solenoid Resistance Chart, Shift Solenoid "B" (2) is measured across pins 1 and 2, and Shift Solenoid "A" (1) across pins 1 and 3; both should read 20-30 ohms.

What is the resistance spec for the Electronic Pressure Control (EPC) solenoid?

The EPC solenoid is measured across solenoid body pins 11 and 12 and should read 3.0-5.0 ohms.

Which pins are used for the transmission fluid temperature sensor?

The Transmission Fluid Temp Sensor uses solenoid body pins 7 and 8; pin 7 goes to PCM pin 37 and pin 8 (Signal Return) to PCM pin 91. Resistance values are 'See Chart Below' (on a separate chart).

What is the difference between the TCC on-off and PWM solenoid resistance?

Both are measured across pins 1 and 4, but the TCC on-off solenoid should read 20-30 ohms while the TCC PWM solenoid should read 10-20 ohms.

Which solenoid connector pins are not used?

Pins 6, 9, and 10 are listed as Not Used in the Solenoid Connector Pin Identification and Function table.

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Ford E4OD Solenoid Body Pin ID, Resistance Chart & PCM Pins - ATSG Fig. 16

ATSG transmission solenoid body pin identification and resistance chart with PCM connector pins

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ATSG transmission solenoid connector pinout and resistance chart: shift/TCC/coast-clutch solenoids 20-30 ohms, EPC solenoid 3.0-5.0 ohms, with gas and diesel PCM pin assignments.

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This page (page 13, Figure 16) from an ATSG (Automatic Transmission Service Group) Technical Service Information manual covers solenoid body pin identification and function, uploaded as a reference for a Ford E4OD automatic transmission. It shows two connector diagrams: the 12-pin solenoid body connector and the mating vehicle harness connector, with pin numbering for each. A Solenoid Resistance Chart lists the pin pairs and expected resistance values for each component: Shift Solenoids A and B (20-30 ohms), TCC on-off solenoid (20-30 ohms), TCC PWM solenoid (10-20 ohms), Coast Clutch Solenoid (20-30 ohms), Electronic Pressure Control solenoid (3.0-5.0 ohms), and the Transmission Fluid Temp Sensor (pins 7 and 8, see separate chart). A second table maps each of the 12 solenoid connector pins to its function and the corresponding PCM connector pin, with separate columns for Gas & Diesel (Cal) and Diesel (49 State) applications. Pins 1 and 12 carry vehicle power (VPWR, PCM pins 71 and 97); grounds from the PCM control the shift, converter clutch, and coast clutch solenoids; pins 6, 9, and 10 are not used. This document is useful for diagnosing solenoid circuits with an ohmmeter and tracing wiring to the PCM.

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Frequently asked questions

What resistance should E4OD shift solenoids A and B read?: Per the Solenoid Resistance Chart, Shift Solenoid "B" (2) is measured across pins 1 and 2, and Shift Solenoid "A" (1) across pins 1 and 3; both should read 20-30 ohms.
What is the resistance spec for the Electronic Pressure Control (EPC) solenoid?: The EPC solenoid is measured across solenoid body pins 11 and 12 and should read 3.0-5.0 ohms.
Which pins are used for the transmission fluid temperature sensor?: The Transmission Fluid Temp Sensor uses solenoid body pins 7 and 8; pin 7 goes to PCM pin 37 and pin 8 (Signal Return) to PCM pin 91. Resistance values are 'See Chart Below' (on a separate chart).
What is the difference between the TCC on-off and PWM solenoid resistance?: Both are measured across pins 1 and 4, but the TCC on-off solenoid should read 20-30 ohms while the TCC PWM solenoid should read 10-20 ohms.
Which solenoid connector pins are not used?: Pins 6, 9, and 10 are listed as Not Used in the Solenoid Connector Pin Identification and Function table.