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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Lin Communication System (Diagnostics) >> Large-Scale Multiplex Communication System For Vehicle Body [LIN] >> ECM Terminal Arrangement

ECM Terminal Arrangement

  1. Instrument panel junction block ASSY, Main body ECM (multiplex network body computer)
G12594738Courtesy of SUBARU OF AMERICA, INC.
  1. Check the main body ECM (multiplex network body computer)
    1. Remove the main body ECM (Multiplex network body computer). (Refer to REMOVAL )
    2. Measure the voltage and resistance between terminals.
      STANDARD VALUE SPECIFICATION

      Terminal No. Item Inspection conditions Standard value
      MB-1 - chassis ground Voltage Always 11 to 14V
      MB-8 - chassis ground Voltage IG ON 11 to 14V
      MB-11 - chassis ground Resistance Always Less than 1 Ω
      MB-32 - chassis ground Voltage Always 11 to 14V
    3. Install the main body ECM (Multiplex network body computer).
    4. Measure the waveform between terminals using an oscilloscope.
    STANDARD VALUE SPECIFICATION

    Terminal No. Item Inspection conditions Standard value
    D5-4 (LIN) - D6-1 (GND) Waveform IG ON Pulse generation
  2. Power window regulator master switch ASSY
    G12594739Courtesy of SUBARU OF AMERICA, INC.
    1. Check the power window regulator master switch ASSY
      1. Disconnect the connector E8 from the power window regulator master switch ASSY.
      2. Measure the voltage and resistance between terminals.
    STANDARD VALUE SPECIFICATION

    Terminal No. Item Inspection conditions Standard value
    E8-5 - chassis ground Resistance Always Less than 1 Ω
    E8-12 - E8-5 Voltage Always 11 to 14V
  3. Power window regulator switch ASSY
    G12594740Courtesy of SUBARU OF AMERICA, INC.
    1. Inspection of the power window regulator switch assy
      1. Disconnect the connector F6 of power window regulator switch ASSY.
      2. Measure the voltage and resistance between terminals.
    STANDARD VALUE SPECIFICATION

    Terminal No. Item Inspection conditions Standard value
    F6-5 - Chassis ground Resistance Always Less than 1 Ω
    F6-12 - F6-5 Voltage Always 11 to 14V
  4. Collation ECM (Smart key computer ASSY) (with smart entry)
    G12594741Courtesy of SUBARU OF AMERICA, INC.
    1. Check the collation ECM (Smart key computer ASSY)
      1. Disconnect the connectors D41 and D48 from the collation ECM (Smart key computer ASSY).
      2. Measure the voltage and resistance between terminals.
    STANDARD VALUE SPECIFICATION

    Terminal No. Item Inspection conditions Standard value
    D41-5 - D48-11 Voltage IG ON 11 to 14V
    D48-2 - D48-11 Voltage Always 11 to 14V
    D48-11 - chassis ground Resistance Always Less than 1 Ω
  5. Steering lock actuator ASSY (with smart entry)
    G12594742Courtesy of SUBARU OF AMERICA, INC.
    1. Check the steering lock actuator ASSY
      1. Disconnect the connector D59 from the steering lock actuator ASSY.
      2. Measure the voltage and resistance between terminals.
    STANDARD VALUE SPECIFICATION

    Terminal No. Item Inspection conditions Standard value
    D59-1 - chassis ground Resistance Always Less than 1 Ω
    D59-6 - D59-1 Voltage IG ON 11 to 14V
    D59-7 - D59-1 Voltage Always 11 to 14V
  6. ID code box (Immobilizer code ECM) (with ID code box)
    G08557395Courtesy of SUBARU OF AMERICA, INC.
    1. Check the ID code box
      1. Disconnect the connector A30 of the ID code box.
      2. Measure the voltage and resistance between terminals.
STANDARD VALUE SPECIFICATION

Terminal No. Item Inspection conditions Standard value
A30-1 - A30-5 Voltage Always 11 to 14V
A30-5 - chassis ground Resistance Always Less than 1 Ω
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