AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0715, P0717

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

DESCRIPTION

This sensor detects the rotation speed of the turbine which shows the input revolution (speed) of the transaxle. By comparing the input turbine speed signal (input speed sensor NT) with the counter gear speed sensor signal (output speed sensor NC), the TCM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions, thus, providing smooth gear shifts.

A01EL2UE04
Text in Illustration
*1 Counter Gear *2 Clutch Drum
*3 Output Speed Sensor NC *4 Input Speed Sensor NT
DTC No. DTC Detection Condition Trouble Area
P0715 When the speed sensor input voltage is either more than 1.9 V or less than 0.1 V for 4.5 seconds or more.(1-trip detection logic)

  • Speed sensor (input speed sensor NT)

  • Transmission wire

  • TCM
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 (R) is OFF

(c) Input speed sensor NT: less than 300 rpm

MONITOR DESCRIPTION

The NT terminal of the TCM detects a revolution signal from the input speed sensor NT (input RPM). The TCM calculates gear shifts comparing the input speed sensor NT with the output 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 revolution (speed) is less than 300 rpm*1 although the output shaft revolution (speed) is more than 1000 rpm*2, the TCM interprets this as a fault, 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

A01EKJ8E27

INSPECTION PROCEDURE

Tech Tips

Using the GTS 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 GTS to the DLC3.

  4. Turn the ignition switch to ON.

  5. Turn the GTS on.

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

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

    TCM
    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    SPD (NT)

    Input shaft speed/

    Min.: 0 rpm

    Max.: 12750 rpm

    Lock-up is


    • ON (after warming up engine): Input turbine speed (NT) is equal to engine speed

    • OFF (idling with shift lever in N): Input turbine speed (NT) is nearly equal to engine speed

    		 Data is displayed in increments of 50 rpm

    Tech Tips


    • 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.

PROCEDURE


  1. INSPECT SPEED SENSOR (SENSOR INSTALLATION)


    1. Remove the valve body assembly.

    2. A01EIU0

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

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

    NG

    REPAIR OR REPLACE SPEED SENSOR Click here

    OK

  2. INSPECT TRANSMISSION WIRE


    1. A01EJGPE03
      Text in Illustration
      *1

      Component without harness connected

      (Transmission Wire)
      *2 TCM Side
      *2 Sensor Side

      Remove the TCM.

    2. Disconnect the speed sensor connector from the transmission wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (NTB) sensor side - 1 (NTB) TCM side Always Below 1 Ω
      2 (NTO) sensor side - 2 (NTO) TCM side Always Below 1 Ω
      1 (NTB) sensor side - Body ground Always 10 kΩ or higher
      2 (NTO) sensor side - Body ground Always 10 kΩ or higher
      1 (NTB) sensor side - All other terminals except 2 (NTO) sensor side Always 10 kΩ or higher
      2 (NTO) sensor side - All other terminals except 1 (NTB) sensor side Always 10 kΩ or higher

    NG

    REPLACE TRANSMISSION WIRE Click here

    OK

  3. REPLACE SPEED SENSOR


    1. Replace the speed sensor Click here.


    NEXT

  4. CHECK IF DTC OUTPUT RECURS (SEE IF DTC P0715 AND/OR P0717 OUTPUT AGAIN)


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Powertrain / ECT / Trouble Codes / Clear.

      Tech Tips

      Write down the currently output DTCs before clearing them.

    4. Perform the monitor drive pattern Click here.

    5. Enter the following menus: Powertrain / ECT / Trouble Codes.

    6. Read the DTCs using the GTS.

      Result
      Display (DTC Output) Proceed to
      Only "P0715 or P0717" is output A
      No output B

    B

    END

    A

    REPLACE TCM Click here