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AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0715, P0717

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DTC Code DTC Name
P0715 Input / Turbine Speed Sensor Circuit Malfunction
P0717 Input Speed Sensor Circuit No Signal
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DESCRIPTION

This sensor detects the rotation speed of the turbine which indicates the input speed of the transaxle. By comparing the input turbine speed (speed sensor NT) signal with the counter gear speed (speed sensor NC) signal, the TCM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. As a result, the gears shift smoothly.

Table 1. Text in Illustration
*1 Counter Gear *2 Clutch Drum
*3 Speed Sensor NC *4 Speed Sensor NT
DTC Code DTC Detection Condition Trouble Area
P0715 When the speed sensor input voltage is either higher than 1.9 V or below 0.1 V for 4.5 seconds or more (1-trip detection logic).

  • Speed sensor NT (speed sensor)

  • Transmission wire

  • TCM
P0717

TCM 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 (R) and STA signal are OFF

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

The NT terminal of the TCM detects a pulse signal from the speed sensor NT (input RPM). The TCM calculates gear shifts by comparing the signal from speed sensor NT with the signal from speed sensor NC.

While the vehicle is operating in 2nd, 3rd, 4th or 5th gear with the shift lever in D, if the input shaft speed is less than 300 rpm*1 although the output shaft speed is more than 1000 rpm*2, the TCM interprets this as a fault, illuminates the MIL and stores the DTC.

Tip:

  • *1: A 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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  1. DATA LIST

    Tip:

    Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    Note:

    In the table below, 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.


    1. Warm up the engine.

    2. Turn the ignition switch off.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the intelligent tester on.

    6. Enter the following menus: Powertrain / ECT / Data List.

    7. According to the display on the tester, read the Data List.

      Table 2. ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SPD (NT)

      Input turbine speed (speed sensor NT)/

      Min.: 0 rpm

      Max.: 12750 rpm

      • Lock-up on (after warming up the engine): Value from speed sensor NT equal to engine speed

      • Lock-up off (idling with shift lever in N): Value from speed sensor NT nearly equal to engine speed

      		 The data is displayed in increments of 50 rpm.
      NT Sensor Voltage

      Input turbine speed sensor output voltage (speed sensor NT)/

      Min.: 0 V

      Max.: 5 V

      		 Engine idling: 0.1 to 1.9 V -
      Tip:

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

      • 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.

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PROCEDURE


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    INSPECT SPEED SENSOR NT INSTALLATION


    1. A01INDO

      Make sure that the connector is properly connected, and check the speed sensor installation.

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

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    INSPECT TRANSMISSION WIRE


    1. A01ISH6E04

      Disconnect the speed sensor connector.

    2. Remove the TCM.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      NTB speed sensor side - 1 (NTB) TCM side Always Below 1 Ω
      NTO speed sensor side - 2 (NTO) TCM side Always Below 1 Ω
      NTB speed sensor side - Body ground Always 10 kΩ or higher
      NTO speed sensor side - Body ground Always 10 kΩ or higher
      NTB speed sensor side - All other terminals except 1 (NTB) TCM side Always 10 kΩ or higher
      NTO speed sensor side - All other terminals except 2 (NTO) TCM side Always 10 kΩ or higher
      Table 3. Text in Illustration
      *1 Transmission Wire
      *a Speed Sensor Side
      *b TCM Side

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    REPLACE SPEED SENSOR NT (SPEED SENSOR)


    1. Replace the speed sensor (Click here).


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    CHECK IF DTC OUTPUT RECURS (DTC P0715 OR P0717)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / ECT / DTC / Clear.

      Tip:

      Write down the currently output DTCs before clearing them.

    5. Perform the monitor drive pattern (Click here).

    6. Enter the following menus: Powertrain / ECT / DTC.

    7. Read the DTCs using the intelligent tester.

      Table 4. Result
      Result Proceed to
      Only P0715 or P0717 is output A
      DTCs are not output B

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    REPLACE TCMClick here

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    SECURELY INSTALL OR REPLACE SPEED SENSOR NTClick here

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    REPLACE TRANSMISSION WIREClick here

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    END