Dtc P0717 Input Speed Sensor Circuit No Signal


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT SPEED SENSOR (INSTALLATION)

INSPECT INPUT SPEED SENSOR NT

CHECK WIRE HARNESS (INPUT SPEED SENSOR - ECM)

DTC P0717 Input Speed Sensor Circuit No Signal


DESCRIPTION

This sensor detects the rotation speed of the turbine, which shows the input revolution of the transmission. By comparing the input speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM detects the shift timing of the gears and controls the engine torque and hydraulic pressure according to various conditions. As a result, smooth gear shifting is achieved.

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0717 Input Speed Sensor Circuit No Signal


DTC No.
DTC Detection Condition
Trouble Area
P0717
All conditions below are detected for 5 sec. or more (1 trip detection logic):
(a) Gear changes not performed
(b) Gear position: 4th or 5th
(c) Transmission input shaft rpm: less than 300 rpm
(d) Transmission output shaft rpm: 1,000 rpm or more
(e) Park/Neutral position switch
  1. NSW input signal is OFF
  2. R input signal is OFF
  3. L input signal is OFF
(f) Shift solenoid valves and park/neutral position switch are operating normally
  1. Open or short in speed sensor NT circuit
  2. Input speed sensor NT
  3. ECM
  4. Automatic transmission (clutch, brake, gear, etc.)

MONITOR DESCRIPTION

This DTC indicates that a pulse is not output from the speed sensor NT (input speed sensor) or is output only a little. The NT terminal of the ECM detects the revolving signal from the speed sensor (NT) (input RPM). The ECM outputs a gear shift signal comparing the input speed sensor (NT) with the output speed sensor (SP2).
While the vehicle is operating in the 4th or 5th gear position with the shift lever on D, if the input shaft revolution is less than 300 rpm*1 although the output shaft revolution is 1,000 rpm or more*2, the ECM detects the trouble, illuminates the MIL and stores the DTC.
HINT:
*1: Pulse is not output or is irregularly output.
*2: The vehicle speed is approximately 50 km/h (31 mph) or more.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0717 Input Speed Sensor Circuit No Signal


INSPECTION PROCEDURE

HINT:
Using the intelligent tester's Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.
  1. Warm up the engine.
  2. Turn the ignition switch OFF.
  3. Connect the intelligent tester to the DLC3.
  4. Turn the ignition switch ON and push the tester main switch ON.
  5. Enter the following menus: Powertrain / Engine and ECT / Data List.
  6. Follow the instructions on the tester and read the Data List.

Item
Measurement Item/
Range (Display)
Normal Condition
Diagnostic Note
SPD (NT)
Input turbine speed/
Min.: 0 rpm
Max.: 12,750 rpm
HINT:
  1. Lock-up ON (after warming up engine):
    Input turbine speed (NT) equal to the engine speed.
  2. Lock-up OFF (idling with shift lever on N):
    Input turbine speed (NT) is nearly equal to engine speed.
Data is displayed in increments of 50 rpm
CAUTION:
In the table above, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
HINT:
  1. SPD (NT) is always 0 rpm while driving:
    Open or short in the sensor or circuit.
  2. SPD (NT) is always more than 0 rpm and less than 300 rpm while driving the vehicle at 50 km/h (31 mph) or more:
    Sensor trouble, improper installation, or intermittent connection trouble of the circuit.
1.INSPECT SPEED SENSOR (INSTALLATION)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0717 Input Speed Sensor Circuit No Signal

  1. Check the speed sensor NT installation.

    OK:
    Installation bolt is tightened properly and there is no clearance between the sensor and transmission case.


NG
SECURELY INSTALL SPEED SENSOR OR REPLACE SPEED SENSOR
OK


2.INSPECT INPUT SPEED SENSOR NT
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0717 Input Speed Sensor Circuit No Signal

  1. Disconnect the T27 sensor connector from the transmission.



  1. Measure the resistance of the sensor.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C (68°F)
    		560 to 680 Ω

    HINT:
    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0717 Input Speed Sensor Circuit No Signal
    Reference: Inspect using an oscilloscope.
    Check the waveform of the ECM connector.
    OK:
    Refer to illustration
    Item
    		Content
    Tester Connection
    		E16-35 (NT+) - E16-27 (NT-)
    Tool Setting
    		1 V/DIV., 2 msec./DIV.
    Condition
    		Engine is idling (P or N position)


NG
REPLACE INPUT SPEED SENSOR NT
OK


3.CHECK WIRE HARNESS (INPUT SPEED SENSOR - ECM)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0717 Input Speed Sensor Circuit No Signal

  1. Disconnect the E16 ECM connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E16-35 (NT+) - E16-27 (NT-)
    		20°C (68°F)
    		560 to 680 Ω
    E16-35 (NT+) - Body ground
    		20°C (68°F)
    		10 kΩ or higher
    E16-27 (NT-) - Body ground
    		20°C (68°F)
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM