PINPOINT TEST C : DTCs P705, P706, P707, P708, P709, P1702, P1921

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

C1 VERIFY DTCS

Ignition OFF.

Select PARK.

NOTE: If the scan tool is unable to access the transmission PIDs, refer to Engine Controls - Introduction (Except Diesel & Hybrid) .

NOTE: Read and record all DTCs.

Using a diagnostic scan tool, carry out the Key ON Engine OFF (KOEO) then the Key ON Engine Running (KOER) test.

Are Transmission Range (TR) sensor DTCs present?

Yes	GO to C2.
No	If no DTCs are present, REFER to Diagnosis By Symptom to diagnose any symptoms that may be present.

C2 CHECK TR SENSOR ELECTRICAL OPERATION

Ignition ON.

Enter the following diagnostic mode on the scan tool: TR PIDs:

Using a diagnostic scan tool, monitor the following PIDs, TR_DC and TR_FREQ.

Move the selector lever into each range and stop.

Observe the following PIDs: TR_DC and TR_FREQ while wiggling the harness or driving the vehicle.

Compare the PID: TR_DC to the selector lever position duty cycle, using the following chart.

Selector Lever Position	Range (% Duty Cycle)
P	8.0 - 25.8
R	30.50 - 39.31
N	40.54 - 52.49
D	54.35 - 71.15
M	65.15 - 82
2	70.55 - 85.61
1	75.25 - 88.91

Is the TR_FREQ between 100 to 150 Hz?

Is the TR_DC within range?

Does the TR_DC and TR_FREQ remain steady when the harness is wiggled or the vehicle driven?

Yes	The problem is not in the TR sensor system. Concern may be intermittent, INSPECT and REPAIR any loose connectors or backed out terminals. If OK, REFER to Diagnosis By Symptom .
No	GO to C3.

C3 CHECK TR SENSOR VPWR CIRCUIT FOR POWER

Ignition OFF.

Disconnect: Transmission Vehicle Harness C1575 .

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
C1575-12	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to C4.
No	INSPECT and REPAIR the transmission vehicle harness circuit for an open. If an open circuit is not found, INSTALL a new PCM, REFER to Electronic Engine Controls . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy .

C4 CHECK TR SENSOR SIGNAL CIRCUIT

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1575-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 4.8 volts?

Yes	GO to C5.
No	INSPECT and REPAIR vehicle harness circuit for an open. If an open circuit is not found, INSTALL a new PCM, REFER to Electronic Engine Controls . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy . CLEAR the DTCs.

C5 CHECK TR SENSOR GROUND CIRCUIT

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1575-4	Courtesy of FORD MOTOR COMPANY	C1575-11

Is the voltage greater than 4.8 volts?

Yes	GO to C6
No	INSPECT and REPAIR transmission vehicle harness circuit for an open. If an open circuit is not found, INSTALL a new PCM, REFER to Electronic Engine Controls . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to Solenoid Body Strategy .

C6 CHECK TR SENSOR TO MANUAL VALVE

Drain the transmission fluid and remove the transmission fluid pan. Refer to Fluid Pan, Gasket and Filter .

Check the connection between the TR sensor and the manual control valve. Refer to Transmission .

Inspect the molded leadframe for metallic contamination, refer to Shift Solenoids (SS) .

Is the TR sensor connected to the manual control valve shaft?

Yes	INSTALL a new TR sensor, REFER to Shift Solenoids (SS) . TEST the system for normal operation.
No	CONNECT the TR sensor to the manual control valve, REFER to Transmission . CLEAN any debris from the molded leadframe. RUN the Key ON Engine OFF(KOEO) self-test. INSTALL a new TR sensor/leadframe, REFER to Solenoid Body Strategy .