Pinpoint Test N: Linear Park Position Sensor

Normal Operation and Fault Conditions

The park pawl motor moves a park pawl rod when energized, moving the park pawl out of the Park position. When the park pawl is in the out of park position, the park pawl motor turns off and a hold out of park (HOOP) solenoid energizes and holds the park pawl out of Park. When power is turned off to the HOOP solenoid a spring returns the park pawl to the Park position. The park pawl actuator uses dual PWM output (at 1000 Hz) park pawl position sensors where sensor A increases as the park pawl moves out of Park and sensor B decreases. Together the sum of the two PWM signal duty cycles should add up to approximately 100%. A rotary sensor measures the position of a cam actuator that moves the linear park pawl rod and determines whether the park pawl actuator is in the "Stay out of Park" mode.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
SOBDMC P07B5:00	Transmission Park Position Sensor/Switch 'A' Circuit Performance/Low: No Sub Type Information	This DTC indicates linear position sensor "A" duty cycle or frequency is out of range.
SOBDMC P07B6:00	Transmission Park Position Sensor/Switch 'A' Circuit Performance High: No Sub Type Information	This DTC indicates the two linear position sensors do not correlate with each other.
SOBDMC P07BB:00	Transmission Park Position Sensor/Switch 'B' Circuit Performance/Low: No Sub Type Information	This DTC indicates the linear position sensor "B" duty cycle or frequency is out of range.
SOBDMC P07BE:00	Transmission Park Position Sensor/Switch 'A' / 'B' Correlation: No Sub Type Information	This DTC indicates the two linear position sensors do not correlate with the rotary position sensor.
SOBDMC P26C3:00	Internal Control Module Transmission Range Sensor Performance: No Sub Type Information	This DTC indicates the two linear position sensors are out of range or the sensors do not correlate.

Possible Sources

Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
Circuit open or shorted
Rear electric drive assembly internal wiring harness
Park lock actuator
SOBDMC

N1 RETRIEVE AND RECORD ALL DTCS

NOTE: If any communication diagnostic trouble codes (DTCs) between the GSM and the SOBDMC are present, resolve those first.

NOTE: If there are any ePark related diagnostic trouble codes (DTCs) in the BCMC, diagnose those first.

Using the diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs).

Are diagnostic trouble codes (DTCs) P07B5, P07B6, P07BB, P07BE and/or P26C3 present?

Yes

GO to N2

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or terminal issues.

N2 CHECK THE PARK POSITION SENSOR VREF CIRCUIT FOR VOLTAGE

Ignition OFF.

Disconnect Rear electric drive assembly C400.

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
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage between 4.8 and 5.2 volts?

Yes

GO to N8

No	If the voltage is less than 4.8 volts, GO to N3 If the voltage is greater than 5.2 volts, GO to N6

N3 CHECK THE PARK POSITION SENSOR VREF CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect SOBDMC C3471D.

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

Measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C3471D Pin 37

Is the resistance less than 3 ohms?

Yes

GO to N4

No	REPAIR the open circuit.

N4 CHECK THE PARK POSITION SENSOR VREF CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to N5

No	REPAIR the short to ground.

N5 RECHECK THE PARK POSITION SENSOR VREF CIRCUIT FOR VOLTAGE

Connect SOBDMC C3471D.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage between 4.8 and 5.2 volts?

Yes	The cause is likely a connector issue. ADDRESS any loose or corroded terminals or pins.

No	INSTALL a new SOBDMC. REFER to: Inverter System Controller [SOBDMC] .

N6 CHECK THE PARK POSITION SENSOR VREF CIRCUIT FOR A SHORT TOGETHER WITH THE POWER CIRCUITS

Measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 1
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 8
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 11
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 14
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 15
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 18
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 21
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 28
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 30
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 31
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 34
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 35
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 38
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 39
C400 Pin 29	Courtesy of FORD MOTOR COMPANY	C400 Pin 40

Are the resistances all greater than 10, 000 ohms?

Yes

GO to N7

No	REPAIR the shorted circuits.

N7 CHECK FOR WATER INTRUSION IN THE HARNESS CONNECTORS
- Check for evidence of water in the connectors.
Is any evidence of water in the connectors present?

Yes REPAIR as necessary.

No INSTALL a new SOBDMC. REFER to: Inverter System Controller [SOBDMC] .

N8 CHECK THE PARK POSITION SIGNAL CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect SOBDMC C3471D.

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

For park position sensor "A" Measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C3471D Pin 6

For park position sensor "B" Measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C3471D Pin 17

Are the resistances less than 3 ohms?

Yes

GO to N9

No	REPAIR the open circuit.

N9 CHECK THE PARK POSITION SIGNAL CIRCUITS FOR A SHORT TO GROUND

For park position sensor "A" measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	Ground

For park position sensor "B" measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to N10

No	REPAIR the short to ground.

N10 CHECK THE PARK POSITION SIGNAL CIRCUITS FOR A SHORT TOGETHER WITH THE POWER CIRCUITS

For park position sensor "A", measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 1
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 8
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 11
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 14
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 15
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 18
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 21
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 28
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 29
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 30
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 31
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 34
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 35
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 39
C400 Pin 38	Courtesy of FORD MOTOR COMPANY	C400 Pin 40

For park position sensor "B", measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 1
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 8
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 11
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 14
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 15
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 21
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 28
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 29
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 30
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 31
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 34
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 35
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 38
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 39
C400 Pin 18	Courtesy of FORD MOTOR COMPANY	C400 Pin 40

Are the resistances all greater than 10, 000 ohms?

Yes

GO to N11

No	REPAIR the shorted circuits.

N11 CHECK THE TRANSMISSION PARK POSITION SENSOR GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C400 Pin 9	Courtesy of FORD MOTOR COMPANY	C3471D Pin 20

Is the resistance less than 3 ohms?

Yes

GO to N12

No	REPAIR the open circuit.

N12 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR VREF CIRCUIT FOR AN OPEN

Remove the transmission case end cover. REFER to: Park Lock Actuator .

Disconnect Park lock actuator

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	C1015A Pin 1

Is the resistance less than 3 ohms?

Yes

GO to N13

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N13 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR VREF CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to N14

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N14 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR VREF CIRCUIT FOR A SHORT TOGETHER WITH THE POWER CIRCUITS

Measure:

Are the resistances all greater than 10, 000 ohms?

Yes

GO to N15

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N15 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR SIGNAL CIRCUITS FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 38	Courtesy of FORD MOTOR COMPANY	C1015A Pin 8
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 18	Courtesy of FORD MOTOR COMPANY	C1015A Pin 3

Are the resistances less than 3 ohms?

Yes

GO to N16

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N16 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR SIGNAL CIRCUITS FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 38	Courtesy of FORD MOTOR COMPANY	Ground
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 18	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to N17

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N17 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR SIGNAL CIRCUITS FOR A SHORT TOGETHER WITH THE POWER CIRCUITS

For park position sensor A, measure:

For park position sensor B, measure:

Are the resistances all greater than 10, 000 ohms?

Yes

GO to N18

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N18 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 9	Courtesy of FORD MOTOR COMPANY	C1015A Pin 6

Is the resistance less than 3 ohms?

Yes

GO to N19

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N19 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR GROUND CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY Rear electric drive assembly connector, component side pin 9	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to N20

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

N20 CHECK THE REAR ELECTRIC DRIVE ASSEMBLY INTERNAL WIRING HARNESS PARK POSITION SENSOR GROUND CIRCUIT FOR A SHORT TOGETHER WITH THE POWER CIRCUITS

Measure:

Are the resistances all greater than 10, 000 ohms?

Yes	INSTALL a new park lock actuator. REFER to: Park Lock Actuator .

No	INSTALL a new rear electric drive assembly. REFER to: Rear Electric Drive Assembly .

Positive Lead	Measurement / Action	Negative Lead
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 1
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 8
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 11
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 14
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 15
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 18
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 21
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 28
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 30
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 31
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 34
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 35
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 38
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 39
Rear electric drive assembly connector, component side pin 29	Courtesy of FORD MOTOR COMPANY	Rear electric drive assembly connector, component side pin 40