P0717

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 turbine speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.








Reference (Using an oscilloscope):





Check the waveform between terminals NT+ and NT- of the ECM connector.
Standard:
Refer to the illustration.





MONITOR DESCRIPTION
This DTC indicates that a pulse is not output from the speed sensor NT (Turbine (input) sped sensor) or is weak. The NT terminal of the ECM detects the revolving signal from speed sensor (NT) (input RPM). The ECM outputs a gearshift 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 in the shift position of D, if the input shaft revolution is less than 300 rpm*1although the output shaft revolution is more than 1,000 rpm or more *2, the ECM detects the trouble, illuminates the MIL and stores the DTC.
*1: Pulse is not output or is irregularly output.
*2: The vehicle speed is approximately 31 mph (50 km/h) or more.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE

WIRING DIAGRAM:

INSPECTION PROCEDURE

HINT:
According to the DATA LIST displayed on the intelligent tester, you can read the values of components, such as the switches, sensors and actuators, without removing any parts. Reading the DATA LIST as a first step of troubleshooting is one method of shortening labor time.

1. Warm up the engine.
2. Turn the ignition switch off.
3. Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
4. Turn the ignition switch to the ON position.
5. Push the "ON" button of the tester.
6. Select the items "DIAGNOSIS/ENHANCED OBD II/DATA LIST/A/T".
7. According to the display on the tester, read the "DATA LIST".





HINT:
- SPD (NT) is always 0 while driving:
Open or short in the sensor or circuit.
- SPD (NT) is always less than 300 rpm while driving the vehicle at 31 mph (50 km/h) or more: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

Steps 1-3 (Part 1):

Step 3 (Part 2):