Pinpoint Test C : Tr Sensor

WARNING: This page is about a different car, the 2019 Ford F-350 Super Duty and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

Transmission Controls - 6R100 for schematic and connector information.

Normal Operation and Fault Conditions

The TR sensor has a set of Hall-effect sensors that have a pattern of ON/OFF states which are dependent on the PARK, REVERSE, NEUTRAL, DRIVE, 3, 2 or 1 position of the manual valve. The TR sensor has digital sensor (hall effect) that converts the shifter position into a bit pattern, and a micro controller that converts the 4 bit signal into a 125 Hz pulse width modulated signal. The TR sensor also provides signals for the starting system and the reverse lights. The PCM uses the TR sensor signal as an input for its strategy for shifting and TCC operation. The PCM also uses the TR sensor signal for transmission fault detection and diagnostics. The TR sensor is integral to the leadframe. DTCs P0705, P0706, P0707, P0708, P0709, P1702, P1705 and P1921 cannot be set by an incorrectly adjusted selector lever cable.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0705:00	Transmission Range Sensor "A" Circuit (PRNDL Input): No Sub Type Information	This DTC indicates the PCM detected a TR sensor circuit fault, but was unable to determine a specific cause. If a more specific DTC is set, resolve them first.
PCM P0706:00	Transmission Range Sensor "A" Circuit Range/Performance: No Sub Type Information	This DTC sets if the PCM detects the duty cycle for TR sensor A is within 8-92%, but the frequency is not 75-125 Hz. The failsafe logic disables all gears except park, revers, neutral, and 5M. If this DTC is set while the engine is off, the failsafe logic disables engine cranking.
PCM P0707:00	Transmission Range Sensor "A" Circuit Low: No Sub Type Information	This DTC sets if the PCM detects the duty cycle for TR sensor A is less than 8%, indicating an open circuit or a short to ground. The failsafe logic disables all gears except park, revers, neutral, and 5M. If this DTC is set while the engine is off, the failsafe logic disables engine cranking.
PCM P0708:00	Transmission Range Sensor "A" Circuit High: No Sub Type Information	This DTC sets if the PCM detects the duty cycle for TR sensor A is more than 92%, indicating a short to power. The failsafe logic disables all gears except park, revers, neutral, and 5M. If this DTC is set while the engine is off, the failsafe logic disables engine cranking.
PCM P0709:00	Transmission Range Sensor "A" Circuit Intermittent: No Sub Type Information	This DTC sets if the PCM detects the duty cycle for TR sensor A is not within 8-92%. Service the more specific DTC first.
PCM P1702:00	Transmission Range Sensor Circuit Intermittent: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0707, P0708 and/or P0709. Service the more specific DTC first.
PCM P1705:00	Transmission Range Circuit Not Indicating Park/Neutral During Self Test: No Sub Type Information	The TR sensor circuit did not indicate park or neutral during a KOEO or a KOER self test.
PCM P1921:00	Transmission Range Signal: No Sub Type Information	This DTC sets in conjunction with P0707 and/or P0708 and indicates the TR sensor failure was detected when the PCM was powered on but the engine was not running. When this DTC is stored, the engine will not start.

Possible Sources

Connectors damaged or pushed-out terminals, corrosion, loose wires or ground and missing or damaged seals
TR sensor
PCM

C1 VERIFY DTCS

NOTE: Read and record all DTCs.
- Ignition OFF.
- Select PARK.
- Connect the diagnostic tool.
- Carry out the KOEO then the KOER test.
Are TR sensor DTCs present?

Yes GO to C2

No If no DTCs are present and to diagnose any symptoms that may be present, REFER to: Diagnosis By Symptom .

C2 CHECK TR SENSOR ELECTRICAL OPERATION

Ignition ON.

Enter the following diagnostic mode on the scan tool: TR PID: TR_DC and TR_FREQ.

Move the selector lever into each range and stop.

Observe 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

Is TR_FREQ between 100 to 150 Hz, is TR_DC within range in each selector lever position, and do both remain steady when the harness is wiggled or the vehicle driven?

Yes	The problem is not in the TR sensor system. REFER to: Diagnosis By Symptom .

GO to C3

C3 CHECK THE TR SENSOR VPWR CIRCUIT FOR VOLTAGE

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
Refer to C1575-12	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to C4

GO to C5

C4 CHECK THE TR SENSOR SIGNAL CIRCUIT FOR VOLTAGE

Measure:

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

Is voltage present?

Yes

GO to C7

GO to C5

C5 CHECK THE TR SENSOR POWER AND SIGNAL CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect PCM C175E.

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

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1575-12	Courtesy of FORD MOTOR COMPANY	Refer to C175E-17
Refer to C1575-4	Courtesy of FORD MOTOR COMPANY	Refer to C175E-37

Is the resistances less than 3 ohms on the suspect circuit?

Yes

GO to C6

No	REPAIR the circuit.

C6 CHECK THE TR SENSOR POWER AND SIGNAL CIRCUITS FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1575-12	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C1575-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms on the suspect circuit?

Yes	Refer to PCM GUIDED ROUTINE TESTING After programming the new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .

No	REPAIR the circuit.

C7 CHECK THE TR SENSOR GROUND CIRCUIT

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1575-12	Courtesy of FORD MOTOR COMPANY	Refer to C1575-11

Is the voltage greater than 11 volts?

Yes

GO to C9

GO to C8

C8 CHECK THE TR SENSOR GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect PCM C175E.

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

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1575-11	Courtesy of FORD MOTOR COMPANY	Refer to C175E-22

Is the resistance less than 3 ohms?

Yes	Refer to PCM GUIDED ROUTINE TESTING After programming the new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .

No	REPAIR the circuit.

C9 CHECK TR SENSOR TO MANUAL VALVE

Drain the transmission fluid and remove the transmission fluid pan. REFER to: Transmission Fluid Pan, Gasket and Filter .

Check the connection between the TR sensor and the manual control valve. 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) .

No	CONNECT the TR sensor to the manual control valve, REFER to: Shift Solenoids (SS) . CLEAN any debris from the molded leadframe. RUN the KOEO self-test. If DTCs return, INSTALL a new TR sensor.