Pinpoint Test A : Transmission Control Solenoids

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK THE SOLENOID POWER CIRCUIT FOR VOLTAGE

NOTE: Read and record all DTCs.

Ignition OFF.

Disconnect Transmission Harness C1623 .

Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1623-1	Courtesy of FORD MOTOR COMPANY	Ground
C1623-2	Courtesy of FORD MOTOR COMPANY	Ground

Are the voltages greater than 11 volts?

Yes

GO to A4

GO to A2

A2 CHECK THE SOLENOID POWER CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect TCM C1750 .

Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1623-1	Courtesy of FORD MOTOR COMPANY	C1750-2
C1623-2	Courtesy of FORD MOTOR COMPANY	C1750-32

Are the resistances less than 3 ohms?

Yes

GO to A3

REPAIR transmission vehicle harness circuit for an open. CLEAR the DTCs. If DTC P0657 returns, INSTALL a new TCM. Refer to: Transmission Control Module (TCM) . PROGRAM the TCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. Refer to: Transmission Strategy Download .

A3 CHECK THE SOLENOID POWER CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1623-1	Courtesy of FORD MOTOR COMPANY	Ground
C1623-2	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to A4

REPAIR transmission vehicle harness circuit short to ground. CLEAR the DTCs. If DTC P0657 returns, INSTALL a new TCM. Refer to: Transmission Control Module (TCM) . PROGRAM the TCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. Refer to: Transmission Strategy Download .

A4 CHECK SOLENOID CONTROL CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect TCM C1750 .

Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

Measure the resistance of the solenoid control circuits using the following chart:

Positive Lead	Measurement / Action	Negative Lead
C1750-14	Courtesy of FORD MOTOR COMPANY	C1623-3
C1750-3	Courtesy of FORD MOTOR COMPANY	C1623-4
C1750-1	Courtesy of FORD MOTOR COMPANY	C1623-5
C1750-13	Courtesy of FORD MOTOR COMPANY	C1623-6
C1750-4	Courtesy of FORD MOTOR COMPANY	C1623-7
C1750-15	Courtesy of FORD MOTOR COMPANY	C1623-8
C1750-2	Courtesy of FORD MOTOR COMPANY	C1623-9

Is the resistance less than 3 ohms on each circuit?

Yes

GO to A5

No	REPAIR the transmission vehicle harness circuit. CLEAR the DTCs.

A5 CHECK SOLENOID CONTROL CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between the transmission vehicle harness C1623 , harness side and ground using the following chart:

Positive Lead	Measurement / Action	Negative Lead
C1623-3	Courtesy of FORD MOTOR COMPANY	Ground
C1623-4	Courtesy of FORD MOTOR COMPANY	Ground
C1623-5	Courtesy of FORD MOTOR COMPANY	Ground
C1623-6	Courtesy of FORD MOTOR COMPANY	Ground
C1623-7	Courtesy of FORD MOTOR COMPANY	Ground
C1623-8	Courtesy of FORD MOTOR COMPANY	Ground
C1623-9	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to A6

No	REPAIR the transmission vehicle harness circuit. CLEAR the DTCs.

A6 CHECK SOLENOID CONTROL CIRCUITS FOR A SHORT TO POWER

Connect TCM C1750 .

Measure the voltage between the transmission vehicle harness C1623 , harness side and ground using the following chart:

Positive Lead	Measurement / Action	Negative Lead
C1623-3	Courtesy of FORD MOTOR COMPANY	Ground
C1623-4	Courtesy of FORD MOTOR COMPANY	Ground
C1623-5	Courtesy of FORD MOTOR COMPANY	Ground
C1623-6	Courtesy of FORD MOTOR COMPANY	Ground
C1623-7	Courtesy of FORD MOTOR COMPANY	Ground
C1623-8	Courtesy of FORD MOTOR COMPANY	Ground
C1623-9	Courtesy of FORD MOTOR COMPANY	Ground

Is voltage greater than 3 volts on each circuit?

Yes	REPAIR the transmission vehicle harness circuit. CLEAR the DTCs.

GO to A7

A7 CHECK COMPONENT RESISTANCE

Measure resistance of the solenoid between the transmission C1623 , component side using the following charts:

Positive Lead	Measurement / Action	Negative Lead
SSA component side C1623-2	Courtesy of FORD MOTOR COMPANY	C1623-3
SSB component side C1623-1	Courtesy of FORD MOTOR COMPANY	C1623-4
SSC component side C1623-2	Courtesy of FORD MOTOR COMPANY	C1623-5
SSD component side C1623-1	Courtesy of FORD MOTOR COMPANY	C1623-6
SSE component side C1623-2	Courtesy of FORD MOTOR COMPANY	C1623-7
LPC solenoid component side C1623-1	Courtesy of FORD MOTOR COMPANY	C1623-8
TCC solenoid component side C1623-1	Courtesy of FORD MOTOR COMPANY	C1623-9

Is the resistance measurement for each between 4.8 and 5.4 ohms?

Yes	INSPECT for stuck valves or debris. If no problems are found, REPLACE suspected solenoid. CLEAR the DTCs. Refer to: Shift Solenoids (SS) .

No	Inspect internal harness for an open or short to ground or short to another circuit, if no issues are found, replace the suspect solenoid.