MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P071531

DTC Code DTC Name
P071531 Input/Turbine Speed Sensor "A" No Signal

DESCRIPTION

The transmission revolution sensor is mounted on the transaxle. The ECM calculates the transaxle input shaft speed using the sensor. When the input shaft rotates, the sensor generates a pulse signal and sends the signal to the ECM. The ECM calculates the input shaft speed based on the signal. If the input shaft speed falls below a threshold despite the engine running, the ECM interprets this as a malfunction in the transmission revolution sensor circuit. The ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P071531 Input/Turbine Speed Sensor "A" No Signal While driving after warm-up with clutch engaged, transmission input speed is not input (1 trip detection logic)

  • Harness and connector

  • Transmission revolution sensor

  • ECM

 Does not come on DTC stored

SAE Code:

P0717

WIRING DIAGRAM

A001TODE02
*a NIM+
*b NIM-
*c Transmission Revolution Sensor

CAUTION / NOTICE / HINT

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Drive the vehicle and confirm the lock-up on and off conditions according to Road Test.

    Click here

  2. Turn the ignition switch off.

  3. Perform step (1) again.

  4. Check for DTCs again.

    Click here

PROCEDURE


  1. READ VALUE USING GTS (ENGINE SPEED AND NIM SENSOR SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List


      Powertrain > Engine > Data List
      Tester Display
      Engine Speed

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


      Powertrain > Engine > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Engine Speed Engine speed

      Min.: 0 rpm

      Max.: 16383 rpm

      		 600 to 700 rpm: Idling (shift lever in neutral, engine warmed up and A/C off) When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

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


      Powertrain > Transmission > Data List
      Tester Display
      NIM Sensor Speed

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


      Powertrain > Transmission > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      NIM Sensor Speed Input shaft speed (NIM)

      Min.: 0 rpm

      Max.: 16383 rpm

      		 Input shaft speed (NIM) equal to engine speed (NE): Clutch pedal not depressed, vehicle running -
      Result
      Result Proceed to
      Data List value is not normal A
      Data List value is normal B

    B

    REPLACE ECM Click here

    A

  2. INSPECT TRANSMISSION REVOLUTION SENSOR


    1. A005PRQC34
      *a Correct
      *b Incorrect
      *c Clearance

      Check the transmission revolution sensor installation.

      OK
      The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY INSTALL OR REPLACE TRANSMISSION REVOLUTION SENSOR Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR - ECM)


    1. Disconnect the C60 transmission revolution sensor connector.

    2. Disconnect the C62 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C60-2 (NCO+) - C62-44 (NIM+) Always Below 1 Ω
      C60-1 (NCO-) - C62-43 (NIM-) Always Below 1 Ω
      C60-2 (NCO+) - Body ground Always 10 kΩ or higher
      C60-1 (NCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT TRANSMISSION REVOLUTION SENSOR


    1. Inspect the transmission revolution sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TRANSMISSION REVOLUTION SENSOR Click here

    OK

  5. INSPECT COUNTER SHAFT (TEETH OF COUNTERSHAFT 2ND SPEED GEAR)


    1. Inspect the teeth of the countershaft 2nd speed gear.

      OK
      No tooth damage on countershaft 2nd speed gear.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COUNTERSHAFT 2ND SPEED GEAR Click here

    OK

  6. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here

  7. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here