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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 P2719 Pressure Control Solenoid "D" Control Circuit Range/Performance; DTC P2720 Pressure Control Solenoid "D" Control Circuit Low; DTC P2721 Pressure Control Solenoid "D" Control Circuit High >> Inspection steps

Inspection steps

WARNING: This page is about a different variant/trim than selected.
  1. Wiring harness and connector check
    1. Disconnect the connector A18 of the transmission control computer ASSY.
    2. Measure the resistance between the terminals.

      Resistance

      Inspection terminals Inspection conditions Standard value
      A18-4 (SLT+) - A18-9 (SLT-) 20°C 5.0 to 5.6Ω
    3. Connect the connector A18 of the transmission control computer ASSY.

      NG: Go to Step  4.

      OK: Go to next step

  2. Check wiring harness and connector (transmission wire - transmission control computer)
    1. Disconnect the connector A18 of the transmission control computer ASSY.
    2. Disconnect the connector L4 of the transmission wire.
    3. Measure the resistance of the vehicle side connector. (ECM TERMINAL ARRANGEMENT  for terminal arrangement)

      Resistance

      Inspection terminals Inspection conditions Standard value
      A18-4 (SLT+) - L4-11 (SLT+) Always Less than 1 Ω
      A18-9 (SLT-) - L4-4 (SLT-) Always Less than 1 Ω
    4. Measure the voltage between the terminals.

      Voltage

      Inspection terminals Inspection conditions Standard value
      A18-4 (SLT+) - chassis ground IG ON 1 V or less
      A18-9 (SLT-) - chassis ground IG ON 1 V or less
    5. Connect the connector L4 of the transmission wire.
    6. Connect the connector A18 of the transmission control computer ASSY.

      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

  4. Check of line pressure control solenoid ASSY (SLT) unit
    1. Check the line pressure control solenoid ASSY (SLT) unit. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES  )

      NG: Repair or replacement of transmission valve body ASSY (refer to TRANSMISSION VALVE BODY ASSY )

      OK: Repair or replacement of transmission wire (refer to TRANSMISSION WIRE )

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