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Home >> Subaru >> 2016 >> BRZ Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission (Diagnostics)) >> Automatic Transmission System >> DTC P1817 Manual Switch System (Low) >> 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. Manual mode switch ASSY check
    1. Disconnect the connector A19 of the transmission control computer ASSY.
    2. Measure the resistance between the terminals.

      Resistance

      Inspection terminals Inspection conditions Standard value
      A19-8 (M) - chassis ground Select lever in M position Less than 1 Ω
      A19-8 (M) - chassis ground Select lever in any other than M position 10 kΩ or more
      1. Connect the connector A19 of the transmission control computer ASSY.

      NG: Go to Step  4.

      OK: Go to next step

  2. Check wiring harness and connector (manual mode switch ASSY - shift position indicator)
    1. Disconnect the connector D36 of the shift position indicator.
    2. Disconnect the connector D28 of the manual mode switch ASSY.
    3. Measure the resistance between the terminals.

      Resistance

      Inspection terminals Inspection conditions Standard value
      D36-6 (MM) - D28-10 (MM+) Always Less than 1 Ω
      D36-6 (MM) - chassis ground Always 10 kΩ or more
      D28-10 (MM+) - chassis ground Always 10 kΩ or more
    4. Connect the connector D28 of the manual mode switch ASSY.
    5. Connect the connector D36 of the shift position indicator.

      NG: Repair or replacement of wiring harness or connector

      OK: Go to next step

  3. 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 INSPECTION FOR PROBLEMS THAT DO NOT NORMALLY OCCUR  )

  4. Check of manual mode switch ASSY unit
    1. Disconnect the connector D28 of the manual mode switch.
    2. Measure the resistance of the terminals.

      Resistance

      Inspection terminals Inspection conditions Standard value
      D28-10 (MM+) - D28-11 (MM-) Select lever in M position Less than 1 Ω
      Select lever in any other than M position 10 kΩ or more
    3. Connect the connector D28 of the manual mode switch.

      NG: Replace of manual mode switch ASSY (refer to REMOVAL )

      OK: Go to next step

  5. Check wiring harness and connector (transmission control computer ASSY - shift position indicator)
    1. Disconnect the connector A19 of the transmission control computer ASSY.
    2. Disconnect the connector D36 of the shift position indicator.
    3. Measure the resistance between the terminals.

      Resistance

      Inspection terminals Inspection conditions Standard value
      D36-5 (M) - A19-8 (M) Always Less than 1 Ω
      D36-5 (M) - chassis ground Always 10 kΩ or more
      A19-8 (M) - chassis ground Always 10 kΩ or more
    4. Connect the connector D36 of the shift position indicator.
    5. Connect the connector A19 of the transmission control computer ASSY.

      NG: Repair or replacement of wiring harness or connector

      OK: Replacement of shift position indicator (refer to REMOVAL )

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