What is tr sensor - Cars & Trucks

It's not called neutral safety switch .
Transmission Range (TR) Position Sensor Assembly
The transmission range (TR) position sensor assembly is an internally mounted sensor that includes the detent spring, rooster comb and bracket, located next to the solenoid body. The components of the TR position sensor are factory adjusted to each other and the sensor must be installed as a calibrated assembly. The TR position sensor contains electronic circuitry that provides the PCM a fixed frequency at a duty cycle for each of the various positions of the manual lever (PARK, REVERSE, NEUTRAL, DRIVE, M3, M2 and M1) to the PCM. The PCM uses the TR position sensor signal for engine functions (start, reverse lamps) and for line pressure control, shift scheduling and TCC operation.

Your best bet , take your vehicle to a qualified repair shop or Dealer .

Diagnosing an electronically controlled automatic transmission is simplified by using the following procedures. One of the most important things to remember is that there is a definite procedure to follow. DO NOT TAKE SHORT CUTS OR ASSUME THAT CRITICAL CHECKS OR ADJUSTMENTS HAVE ALREADY BEEN MADE. Follow the procedures as written to avoid missing critical components or steps. By following the diagnostic sequence, the technician will be able to diagnose and repair the concern the first time.
On-Board Diagnostics with Scan Tool
NOTE: For detailed instruction and other diagnostic methods using the scan tool, refer to the tester manual and the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
These quick tests should be used to diagnose the PCM and should be carried out in order.

• Quick Test 1.0-Visual Inspection
• Quick Test 2.0-Set Up
• Quick Test 3.0-Key On, Engine Off
• Quick Test 4.0-Continuous Memory
• Quick Test 5.0-Key On, Engine Running
• Special Test Mode
  • Wiggle Test
  • Output Test Mode
• PCM Reset Mode
• Clearing DTCs
• OBD II Drive Cycle
• For further information on other diagnostic testing features using the scan tool, refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. Other diagnostic methods include the following.
  • Parameter Identification (PID) Access Mode
  • Freeze Frame Data Access Mode
  • Oxygen Sensor Monitor Mode
  • P0706 TR Sensor TR sensor frequency fault detected. TR sensor signal frequency is out of normal range. Only REVERSE, NEUTRAL and 5th gear detected. Engine may not crank. For gasoline engine vehicles, Go To Pinpoint Test C . For diesel engine vehicles, Go To Pinpoint Test H . P0707 TR Sensor TR sensor circuit duty cycle low input. TR sensor signal duty cycle is below threshold, sensor/circuit electrical malfunction. Only REVERSE, NEUTRAL and 5th gear detected. Engine may not crank. For gasoline engine vehicles, Go To Pinpoint Test C . For diesel engine vehicles, Go To Pinpoint Test H .

Possible causes
- Faulty Transmission Range (TR) sensor
- Transmission Range (TR) sensor harness is open or shorted
- Transmission Range (TR) sensor circuit poor electrical connection

code p0708 refers to transmission range (TR) switch/sensor--high input===causes --wiring short to positive--TR switch/ sensor--ECM/TCM

replace the TR sensor /switch first and then check the TCM for operation

code p0705 refers to transmission range(TR)sensor/switch--PRNDL input--circuit malfunction===causes--wiring--TR sensor/switch---ECM/TCM
I would have the TR sensor/switch checked out first and then the TCM module.

On 1992 and later models, the neutral safety switch is incorporated into the Manual Lever Position or Transmission Range MLP/TR sensor.

RENOVAL & INSTALLATION

1. Disconnect the negative battery cable.
   
2. Raise and support the vehicle safely on jackstands.
   
3. Place the transmission in Neutral.
   
4. Remove and discard the manual control lever nut, then remove the lever from the transmission.
   
5. Detach the TR sensor electrical harness connector, remove the TR sensor retaining bolts, then pull the TR sensor off of the transmission case.
   

To install:

1. Position the TR sensor against the transmission case and loosely install the 2 retaining screws.
   
2. Attach the TR sensor electrical harness connector.
   
3. Use an alignment tool, such as the TR Sensor Alignment Tool T93P-70010-A, to align the TR sensor slots.
   
4. Tighten the TR sensor bolts to 80-100 inch lbs. (9-11 Nm).
   
5. Position the manual control lever onto the TR sensor, then install the new lever nut to 22-26 ft. lbs. (30-35 Nm).
   
6. Lower the vehicle.
   
7. Connect the negative battery cable.

ADJUSTMENT

Fig. : Adjusting the MLP sensor (click image for zoom)


Park is the last detent when the manual control lever is full forward. Return 2 detents toward the output shaft for Neutral.

1. Position the manual control lever in Neutral .
   
2. Raise the and safely support the vehicle.
   
3. Loosen the sensor retaining bolts.
   
4. Insert Gear Position Sensor Adjuster tool T93P-700 10-A or equivalent, into the slots.
   
5. Align all 3 slots on the MLP sensor with 3 tabs on the tool.
   
6. Tighten the attaching screws to 80-100 inch lbs. (9-11 Nm).
   
7. Lower the vehicle.

Hope this helps (remember to rating ans leave a testimonial commnet about this free answer).

CODE PO705 IS DTR SENSOR TR SENSOR CIRCUIT MALFUNCTION. POSSIBLE CAUSES, DTR OR TR SENSOR CONNECTOR IS DAMAGED OR SHORTED, DTR OR TR SENSOR SIGNAL CIRCUIT IS OPEN OR SHORTED TO GROUND, DTR OR TR SENSOR SIGNAL CIRCUIT IS SHORTED TO VREF 5V, DTR OR TR SENSOR DAMAGED, PCM HAS FAILED.

only have 2002 right now

SECTION 307-01: Automatic Transmission/Transaxle 2002 Focus Workshop Manual
IN-VEHICLE REPAIR Transmission Range (TR) Sensor Removal

1. Disconnect the transmission range (TR) sensor electrical connector and the selector lever cable.

1. NOTE: Failure to hold the shift lever while loosening or tightening the manual shaft lever will transmit rotational torque to the TR switch and shift mechanism.
   Remove the TR sensor (automatic transaxle removed shown).
   1. Remove the manual control lever.
   1. Remove the bolts.

Installation

1. NOTE: Failure to hold the shift lever while loosening or tightening the manual shaft lever will transmit rotational torque to the TR switch and shift mechanism.
   Install the TR sensor (automatic transaxle removed shown).
   • Loosely install the bolts.
   • Install the manual control lever.

1. Using the special tool, align the TR sensor and tighten the bolts.

1. CAUTION: Do not use air tools on this bolt. Hold the manual control lever while tightening the manual control lever bolt, failure to the manual control lever shaft could occur.
   Install the manual control lever.

1. CAUTION: Check the manual control lever is in position "3" same as "D" position.
   Adjust the manual control lever to TR sensor "D" position.
   1. "1" Low 1
   1. "2" Low 2
   1. "D" Drive
   1. "N" Neutral
   1. "R" Reverse
   1. "P" Park
   • When in position "D" the marks on the manual control lever line up with the marks on the TR Sensor.

1. Connect the selector lever cable and the TR sensor electrical connector.

here on top of the transmission:


Fig. Fig. 1: Remove the two TR sensor retaining bolts

Fig. Fig. 2: Align the TR sensor slots using TR sensor alignment tool T92-70010-AH or equivalent

1. Disconnect the negative battery cable.
2. Place the shift selector into NEUTRAL .
3. Remove the air cleaner outlet tube and the air cleaner housing from the vehicle.
4. Detach the electrical connector from the TR sensor.
5. Remove the retaining nut and detach the manual control lever from the TR sensor.
6. Remove the two TR sensor retaining bolts and remove the TR sensor from the transaxle.

To install:

1. Make sure that the shift selector is in NEUTRAL .
2. Place the TR sensor onto the transaxle and loosely install the retaining bolts.
3. Align the TR sensor slots using TR sensor alignment tool T92-70010-AH or equivalent.
4. Tighten the TR sensor retaining bolts to 80-106 inch lbs. (9-12 Nm).
5. Attach the electrical connector to the TR sensor.
6. Attach the manual control lever to the TR sensor and tighten the nut to 98-141 inch lbs. (11-16 Nm).
7. Install the air cleaner housing and the outlet tube.
8. Connect the negative battery cable.
9. Verify that the engine will only start in NEUTRAL or PARK

Yup, if you scanned your engine computer and you got a code P0705, you can bet that's why your Check Engine light is on.

P0705, however, is NOT a Vehicle Speed Sensor code on this vehicle. It is a Digital Transmission Range Sensor code. It is caused by an open or shorted circuit in the TR-1, TR-2, TR-3a or TR-4 circuits. This code CANNOT be set by an incorrectly adjusted TR Sensor.