Pinpoint Test J : DTCS P0706, P0707, P0708, P1702, P1705, P1921

Refer to Transmission Controls - 6F35 for schematic and connector information.

Normal Operation and Fault Conditions

The TR sensor provides a fixed frequency duty cycle to the PCM for each manual control lever positions (PARK, REVERSE, NEUTRAL, DRIVE and LOW). The PCM uses the TR sensor signal for LPC, shift scheduling and TCC operation. The PCM transmits TR data on the High Speed (HS) CAN to the BCM for engine start and reverse lamp operation.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0706:00	Transmission Range Sensor "A" Circuit Range/Performance: No Sub Type Information	Mechanical or electrical fault. Input from the TR sensor did not change or is intermittent.
PCM P0707:00	Transmission Range Sensor "A" Circuit Low: No Sub Type Information	TR sensor circuit open or short to ground.
PCM P0708:00	Transmission Range Sensor "A" Circuit High: No Sub Type Information	TR sensor circuit open.
PCM P1702:00	Transmission Range Sensor Circuit Intermittent: No Sub Type Information	TR sensor circuit open or short to ground.
PCM P1705:00	Transmission Range Circuit Not Indicating Park/Neutral During Self Test: No Sub Type Information	TR sensor misaligned or in wrong position during the self-test.
PCM P1921:00	Transmission Range Signal: No Sub Type Information	The PCM has detected a TR signal duty cycle out of range.

Possible Sources

Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
TR sensor
Transmission internal wiring harness frame
PCM

J1 RETRIEVE AND RECORD ALL DTCS
- Using the diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs).
Are diagnostic trouble codes (DTCs) P0706, P0707, P0708, P1702, P1705 and/or P1921 present?

Yes For diagnostic trouble codes (DTCs) P0706, P0708, P1702 and/or P1921, GO to J2 For DTC P1705, GO to J9

No REFER to: Diagnosis By Symptom .

J2 VERIFY SELECTOR LEVER CABLE/LINKAGE ADJUSTMENT

Verify the selector lever cable/linkage is correctly adjusted. REFER to: Selector Lever Cable Adjustment .

Is the selector lever cable/linkage is correctly adjusted?

Yes

GO to J3

No	VERIFY the selector lever cable/ linkage adjustment. REFER to: Selector Lever Cable Adjustment . REPEAT the self-test. If the TR sensor diagnostic trouble codes (DTCs) return, GO to J3

J3 CHECK THE TR (TRANSMISSION RANGE) SENSOR CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect Transmission Vehicle Harness C168A.

Disconnect PCM C175E.

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

Measure:

Positive Lead	Measurement / Action	Negative Lead
C168A-17	Courtesy of FORD MOTOR COMPANY	C175E-20
C168A-18	Courtesy of FORD MOTOR COMPANY	C175E-17
C168A-20	Courtesy of FORD MOTOR COMPANY	C175E-22

Is the resistance less than 3 ohms?

Yes

GO to J4

No	REPAIR the circuit.

J4 CHECK THE TR (TRANSMISSION RANGE) SENSOR CIRCUITS FOR A SHORT TO GROUND

Disconnect Transmission Vehicle Harness C168A.

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

Measure:

Positive Lead	Measurement / Action	Negative Lead
C168A-17	Courtesy of FORD MOTOR COMPANY	Ground
C168A-18	Courtesy of FORD MOTOR COMPANY	Ground
C168A-20	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to J5

No	REPAIR the circuit.

J5 CHECK THE TR (TRANSMISSION RANGE) SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C168A-17	Courtesy of FORD MOTOR COMPANY	Ground
C168A-18	Courtesy of FORD MOTOR COMPANY	Ground
C168A-20	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to J6

J6 CHECK THE TR (TRANSMISSION RANGE) SENSOR CIRCUITS FOR A SHORT TOGETHER

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C168A-20	Courtesy of FORD MOTOR COMPANY	C168A-18
C168A-20	Courtesy of FORD MOTOR COMPANY	C168A-17
C168A-18	Courtesy of FORD MOTOR COMPANY	C168A-17

Are all of the resistances greater than 10, 000 ohms?

Yes

GO to J7

No	REPAIR the circuits.

J7 CHECK THE TR (TRANSMISSION RANGE) SENSOR CIRCUITS IN THE TRANSMISSION INTERNAL WIRING HARNESS FRAME FOR AN OPEN

Remove the main control cover. REFER to: Main Control Cover .

Disconnect TR Sensor.

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

Measure:

Positive Lead	Measurement / Action	Negative Lead
Component side resistance pins 18, 17 and 20.	Courtesy of FORD MOTOR COMPANY	Component side resistance pins 1, 2 and 3.

Is the resistance less than 3 ohms?

Yes

GO to J8

No	INSTALL a new transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame .

J8 CHECK FOR VOLTAGE AND GROUND AT THE TR (TRANSMISSION RANGE) SENSOR

Connect PCM C175E.

Connect Transmission Vehicle Harness C168A.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
TR sensor pin 1.	Courtesy of FORD MOTOR COMPANY	TR sensor pin 3.

Is the voltage greater than 11 volts?

Yes	INSTALL a new TR sensor. REFER to: Transmission Range (TR) Sensor .

No	CHECK OASIS for applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, discontinue this test and follow the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to PCM Guided Routine Testing .

J9 ON DEMAND SELF-TEST

Check to make sure the transmission harness connector is fully seated, terminals are engaged in connector and in good condition before proceeding.

Make sure the selector lever is in the Park or Neutral position.

Using the diagnostic scan tool, carry out the KOEO self-test.

Did DTC P1705 return?

Yes	VERIFY selector lever cable adjustment. REFER to: Selector Lever Cable Adjustment .

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.