GSIC - Global Service Information Center

### DTC P0717 Input Speed Sensor Circuit No Signal

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## 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, providing smooth gear shift.

DTC No. | DTC Detection Condition | Trouble Area

P0717

1. All conditions below are detected for 5 sec. or more
   (1 trip detection logic):

1. Gear changes not performed
2. Gear position: 4th or 5th
3. Transmission input shaft rpm: 300 rpm or less
4. Transmission output shaft rpm: 1,000 rpm or more
5. PNP switch

1. NSW input signal is OFF
2. R input signal is OFF
3. L input signal is OFF

6. Shift solenoid valves and PNP 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 or 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

## 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/
display: 50 r/min

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.

-

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 while driving:
   Open or short in the sensor or circuit.
2. SPD (NT) is always more than 0 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

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 SENSOR OR REPLACE SENSOR

OK |

2.INSPECT INPUT SPEED SENSOR (NT)

1. Disconnect the T6 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:

     Reference: Inspect using an oscilloscope.
     Check the waveform of the ECM connector.

   Standard voltage:
     Refer to illustration

     Item | Content
     Tester Connection | E16-35 (NT+) - E16-27 (NT-)
     Tool Setting | 1 V/DIV., 2 msec./DIV.
     Condition | Engine idle speed (shift lever on P or N)

| NG |

REPLACE INPUT SPEED SENSOR (NT)

OK |

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

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