Pinpoint Test L: Output Shaft Speed Sensor

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.

L1 READ AND RECORD ALL DTCS
- Connect the scan tool.
- Read and record all DTCs.
Were DTCs P0720, P0721, P0722 and/or P0715 set?
- Yes : For DTCs P0720, P0721 and P0722, GO to L2 .
  For DTC P0720 and P0715, GO to L7.
- No : GO to SYMPTOM CHART .

L2 CHECK OSS SENSOR SIGNAL CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect: Transmission Vehicle Harness C168 .
Disconnect: PCM C175T .
Inspect the connectors 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
C168-10	VET26 (BN/GN)	C175T-25	VET26 (BN/GNG)

Fig 1: Identifying Transmission Vehicle Harness Connector (C168-10)

Courtesy of FORD MOTOR CO.

Is the resistance less than 5 ohms?

Yes : GO to L3 .
No : REPAIR the circuit. CLEAR the DTCs.

L3 CHECK OSS SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-10	VET26 (BN/GN)	-	Ground

Fig 2: Identifying Transmission Vehicle Harness Connector (C168-10)

Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms?

Yes : GO to L4 .
No : INSPECT and REPAIR the circuit. If a short to ground is not found, 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 .

L4 CHECK OSS SENSOR SIGNAL CIRCUIT FOR A SHORT TO POWER

Ignition ON.

Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-10	VET24 (BN/GN)	-	Ground

Fig 3: Identifying Transmission Vehicle Harness Connector (C168-10)

Courtesy of FORD MOTOR CO.

Is any voltage present?

Yes : INSPECT and REPAIR the circuit. If a short to power is not found, 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 : GO to L5 .

L5 CHECK THE OSS SENSOR GROUND CIRCUIT

Ignition OFF.
Connect: PCM C175T .
Ignition ON.

Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C168-20	LE111 (VT/GN)	C168-9	VET24 (BN/GN)

Fig 4: Identifying PCM Connector Terminals (C175T)

Courtesy of FORD MOTOR CO.

Is voltage less than 4.8 volts?

Yes : INSPECT and REPAIR the circuit. If an open circuit is not found, 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 : GO to L6 .

L6 CHECK THE SOLENOID BODY SIGNAL CIRCUIT FOR AN OPEN

Ignition OFF.
Remove the main control cover. REFER to MAIN CONTROL COVER .
Disconnect: OSS Sensor.

Measure the component side resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
10	-	1	-

Fig 5: Identifying OSS Sensor Connector Terminals (10, 1)

Courtesy of FORD MOTOR CO.

Is the resistance greater than 0.5 ohms?

Yes : 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 : INSTALL a new OSS sensor. REFER to OUTPUT SHAFT SPEED (OSS) SENSOR .

L7 CHECK OSS SENSOR VPWR CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect: Transmission Vehicle Harness C168 .
Inspect the connectors 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
C168-20	LE111 (VT/GN)	-	Ground

Is the voltage less than 9.5 volts?

Yes : INSPECT and REPAIR the circuit. CLEAR the DTCs. If an open circuit is not found, 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 : 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 .