AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0717

DTC Code DTC Name
P0717 Turbine Speed Sensor Circuit No Signal

DESCRIPTION

This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), 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.

DTC No. DTC Detection Condition Trouble Area
P0717

ECM detects conditions (a), (b) and (c) continuously for 5 sec. or more: (1-trip detection logic)

(a) Vehicle speed: 50 km/h (31 mph) or more

(b) Park/neutral position switch (STAR (NSW), R and L) is OFF

(c) Speed sensor (NT): less than 300 rpm

  • Open or short in transmission revolution sensor NT (speed sensor NT) circuit

  • Transmission revolution sensor NT (speed sensor NT)

  • ECM

  • Automatic transaxle assembly
A01CFQ0E12

Reference (Using an oscilloscope):

Check the waveform between terminals NT+ and NT- of the ECM connector.

Standard: Refer to the illustration.
Terminal Tool setting Vehicle condition
NT+ - NT- 5 V/DIV., 0.5ms./DIV. Vehicle speed 20 km/h (12 mph)

MONITOR DESCRIPTION

The NT terminal of the ECM detects a revolution signal from the speed sensor (NT) (input RPM). The ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC).

While the vehicle is operating in 2nd, 3rd or 4th gear 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*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 50 km/h (31 mph) or more.

WIRING DIAGRAM

A01CBESE14

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT SPEED SENSOR INSTALLATION


    1. A01CFPDE36

      Check the speed sensor installation.

      OK
      The installation bolt is tightened properly and there is no clearance between the sensor and transaxle case.

    NG

    REPLACE SPEED SENSOR (NT) Click here

    OK

  2. INSPECT SPEED SENSOR (NT)


    1. A01CFJBE09

      Disconnect the speed sensor connector from the transaxle.

    2. Measure the resistance according to the value(s) in the table below.

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

    NG

    REPLACE SPEED SENSOR (NT) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM)


    1. A01CFRLE50

      Connect the speed sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      D41-125 (NT+) - D41-124 (NT-) 20°C (68°F) 560 to 680 Ω

    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      D41-125 (NT+) - Body ground Always 10 kΩ or higher
      D41-124 (NT-) - Body ground Always

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here