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AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0717

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DTC Code DTC Name
P0717 Turbine Speed Sensor Circuit No Signal
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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 (NSW (STAR) and R) 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

Reference (Using an oscilloscope):

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

Table 1. Standard: Refer to the illustration.
Terminal NT+ - NT-
Tool setting 5 V/DIV, 0.5 ms/DIV
Vehicle condition Vehicle speed 20 km/h (12 mph)
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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, 4th or 5th 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 1000 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.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


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    INSPECT SPEED SENSOR INSTALLATION


    1. A017C02E36

      Check the speed sensor installation.

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

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    INSPECT SPEED SENSOR (NT)


    1. A017G1ME68

      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

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    CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM)


    1. A017CYDE11

      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
      B2-35 (NT+) - B2-27 (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
      B2-35 (NT+) - Body ground Always 10 kΩ or higher
      B2-27 (NT-) - Body ground

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    REPLACE ECM (for 2GR-FE)Click here

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    REPLACE SPEED SENSOR (NT)Click here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR