Pinpoint Test C : Tr Sensor
WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- C1 VERIFY DTCSNOTE: 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 the 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 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. 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 Ground
Is the voltage greater than 11 volts?
Yes GO to C6 No INSPECT Fuse 93 (25A), if OK REPAIR the transmission vehicle harness circuit for an open or short to ground. If an open circuit or short to ground is not found, INSTALL a new PCM, REFER to: POWERTRAIN CONTROL MODULE (PCM) . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to: Transmission Strategy Download . If the fuse is not OK, GO to C4 - C4 CHECK TR POWER CIRCUIT FOR A SHORT TO GROUND
- Measure:
Positive Lead Measurement / Action Negative Lead C1575-12 Ground
Is the resistance greater than 10, 000 ohms?
Yes GO to C5 No REPAIR the circuit. - Measure:
- C5 CHECK TR RETURN CIRCUIT FOR A SHORT TO GROUND
- Measure:
Positive Lead Measurement / Action Negative Lead C1575-5 Ground
Is the resistance greater than 10, 000 ohms?
Yes INSTALL a new molded leadframe. INSTALL new foam strip (Service Part Number FL3Z-14B167-A) between molded leadframe and the solenoids. Refer to: Shift Solenoids (SS) . No REPAIR the circuit. - Measure:
- C6 CHECK TR SENSOR SIGNAL CIRCUIT
- Measure:
Positive Lead Measurement / Action Negative Lead C1575-4 Ground
Is the voltage greater than 4.8 volts?
Yes GO to C7 No INSPECT and REPAIR the transmission vehicle harness for an open. If an open circuit is not found, INSTALL a new PCM, REFER to: POWERTRAIN CONTROL MODULE (PCM) . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to: Transmission Strategy Download . - Measure:
- C7 CHECK TR SENSOR GROUND CIRCUIT
Is the voltage greater than 4.8 volts?
Yes GO to C8 No INSPECT and REPAIR transmission vehicle harness circuit for an open. If an open circuit is not found, INSTALL a new PCM, REFER to: POWERTRAIN CONTROL MODULE (PCM) . PERFORM the Solenoid Body Strategy Data Download procedure. REFER to: Transmission Strategy Download . - C8 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.