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Terminals Of ECU

WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
    Fig 1: Identifying Instrument Panel Junction Block Assembly And Main Body ECU (Multiplex Network Body ECU) Connectors Terminals
    G08557409Courtesy of SUBARU OF AMERICA, INC.
    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
    2. Disconnect the D5, D6 and A73 main body ECU (multiplex network body ECU) connectors.
    3. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.
      Terminal No. Terminal Description Condition Specified Condition
      MB-1 - Body ground Battery power supply Always 11 to 14 V
      MB-8 - Body ground Ignition switch power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      MB-9 - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      MB-11 - Body ground Ground Always Below 1 Ω
      MB-32 - Body ground Battery power supply Always 11 to 14 V
      D5-22 - Body ground Unlock warning switch input No key in ignition key cylinder (off) Below 1 V
      Key inserted ignition key cylinder (on) 11 to 14 V
      D6-1 - Body ground Ground Always Below 1 Ω
      A73-4 - Body ground Ground Always Below 1 Ω
    4. Reconnect the D5, D6 and A73 main body ECU (multiplex network body ECU) connectors.
    5. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
    6. Measure the voltage and resistance, check for pulse according to the valve(s) in the table below.
      Terminal No. Terminal Description Condition Specified Condition
      3A-28 - Body ground Driver side door courtesy light switch input Driver side door open Below 1 V
      Driver side door closed Pulse generation
      3B-13 - Body ground Passenger side door courtesy light switch input Passenger side door open Below 1 V
      Passenger side door closed Pulse generation
      3B-2 - Body ground Door lock motor lock drive output (for driver side) Door control switch not pushed Below 1 V
      Lock side of door control switch pushed 11 to 14 V
      3B-3 - Body ground Door lock motor lock drive output (for passenger side) Door control switch not pushed Below 1 V
      Lock side of door control switch pushed 11 to 14 V
      3B-1 - Body ground Door lock motor unlock drive output (for driver side) Door control switch not pushed Below 1 V
      Lock side of door control switch pushed 11 to 14 V
      3B-4 - Body ground Door lock motor unlock drive output (for passenger side) Door control switch not pushed Below 1 V
      Lock side of door control switch pushed 11 to 14 V
      3D-26 - Body ground Luggage compartment door courtesy light switch input Door control switch not pushed Below 1 V
      Lock side of door control switch pushed 11 to 14 V
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