Pinpoint Test F: Transmission Solenoid Power Control

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

F1 READ AND RECORD ALL DTCS
- Connect the scan tool.
- Read and record all DTCs.
Was DTC P0657 set?
- Yes : GO to F2 .
- No : GO to SYMPTOM CHART .

F2 CHECK THE TRANSMISSION SOLENOID POWER CONTROL CIRCUIT

Ignition OFF.
Disconnect: Transmission Vehicle Harness C168 .
Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
Ignition ON.

Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-15	CET49 (BN)	-	Ground

Fig 1: Identifying Transmission Vehicle Harness Connector (C168-15)

Courtesy of FORD MOTOR CO.

Is the voltage greater than 9.8 volts?

Yes : REMOVE the main control cover. REFER to MAIN CONTROL COVER . INSPECT the solenoid body for metal shavings on the exposed metal contacts or other components. CLEAN the solenoid body and RECHECK the resistance value. If the resistance value is out of specification and a short to ground is not found, INSTALL a new solenoid body assembly. REFER to SOLENOID BODY ASSEMBLY . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to SOLENOID BODY STRATEGY DOWNLOAD . PERFORM the Solenoid Body Strategy Drive Cycle, REFER to SOLENOID BODY STRATEGY DRIVE CYCLE .
No : GO to F3 .

F3 CHECK THE TRANSMISSION SOLENOID POWER CONTROL CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect: PCM C175T .
Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-15	CET49 (BN)	C175T-50	CET49 (BN)

Fig 2: Identifying PCM Connector Terminals (C175T)

Courtesy of FORD MOTOR CO.

Is the resistance less than 5 ohms?

Yes : GO to F4 .
No : REPAIR the circuit. CLEAR the DTCs.

F4 CHECK THE TRANSMISSION SOLENOID POWER CONTROL CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-15	CET49 (BN)	-	Ground

Fig 3: Identifying Transmission Vehicle Harness Connector Terminals (C168-15)

Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms?

Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . PROGRAM the PCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to SOLENOID BODY STRATEGY DOWNLOAD . PERFORM the Solenoid Body Strategy Drive Cycle, REFER to SOLENOID BODY STRATEGY DRIVE CYCLE .
No : REPAIR the circuit. CLEAR the DTCs.