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Home >> Subaru >> 2014 >> BRZ Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transaxle (Diagnostics)) >> Automatic Transmission System >> DTC P0717 Input/Turbine Speed Sensor "A" Circuit No Signal >> Inspection steps

Inspection steps

WARNING: This page is about a different variant/trim than selected.
NOTE: Read the freeze frame data using the SSM3. A part of the engine running conditions under which the engine trouble occurred is recorded in the freeze frame data, which is useful for troubleshooting.
  1. Check of transmission revolution sensor (NT) installation condition
    1. Check the installation condition of the transmission revolution sensor (NT).

      Criteria: The mounting bolt is not loosened and the sensor is not lifted or tilted.

      Fig 1: Identifying Installation Condition Of Transmission Revolution Sensor
      G08552737Courtesy of SUBARU OF AMERICA, INC.

      NG: Repair of installation condition or replacement of transmission revolution sensor (NT) (refer to REMOVAL )

      OK: Go to Next Step

  2. Check of transmission revolution sensor (NT) unit
    1. Disconnect the connector L5 of the transmission revolution sensor (NT).
    2. Check the transmission revolution sensor (NT) unit. (Refer to INSTALLATION )
    3. Connect the connector L5 of the transmission revolution sensor (NT).

      NG: Replacement of transmission revolution sensor (NT) (refer to REMOVAL )

      OK: Go to Next Step

  3. Check wiring harness and connector (transmission control computer - transmission revolution sensor)
    NOTE: Refer to INSPECTION PROCEDURES FOR ELECTRICAL CIRCUITS AND HOW TO PERFORM for checking procedure and precautions of wiring harness and connector
    1. Disconnect the connector A19 of the transmission control computer ASSY.
    2. Disconnect the connector L5 of the transmission revolution sensor (NT).
    3. Measure the resistance between the terminals. (Refer to ECM TERMINAL ARRANGEMENT  for terminal arrangement of transmission control computer ASSY)
      RESISTANCE

      Inspection terminals Inspection conditions Standard value
      L5-1 (NT+) - A19-17 (NT+) Always Less than 1 Ω
      L5-2 (NT-) - A19-28 (NT-) Always Less than 1 Ω
      L5-1 (NT+) - chassis ground Always 10 k Ωor more
      L5-2 (NT-) - chassis ground Always 10 k Ωor more
    4. Connect the connector A19 of the transmission control computer ASSY.
    5. Connect the connector L5 of the transmission revolution sensor (NT).

      NG: Repair or replacement of wiring harness or connector

      OK: Go to Next Step

  4. Replacement of transmission control computer ASSY
    1. Replace the transmission control computer ASSY. (Refer to TRANSMISSION CONTROL COMPUTER ASSY )

      Next: AT unit correction (refer to WORK SUPPORT  )

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