LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Engine Immobilizer System (W/O Entry Start) (Diagnostics And Symptom Tests) >> Engine Immobilizer System (Without Entry & Start System) >> ECM Terminal Arrangement

ECM Terminal Arrangement

  1. Check the transponder key amplifier.
    G12589423Courtesy of SUBARU OF AMERICA, INC.
    1. Disconnect the D54 transponder key amplifier connector.
    2. Refer to the table below and measure the resistance and the voltage and check for a pulse.
      Terminal No. (symbol) Input/output Wiring color Terminal description Conditions Specified condition
      D54-7 (AGND) - Chassis ground - GR - Chassis ground Ground Always 1 Ω or less
    3. Reconnect the D54 transponder key amplifier connector.
    4. Refer to the table below and measure the voltage and check for a pulse.
      Terminal No. (symbol) Input/output Terminal description Conditions Specified condition
      D54-1 (VC5) - D54-7 (AGND) Input Transponder key amplifier power supply Key is not inserted to the ignition key cylinder. 1 V or less
      Key is inserted to the ignition key cylinder. 4.5 to 5.5V
      D54-4 (CODE) - D54-7 (AGND) Output Key code data revision signal Key is not inserted to the ignition key cylinder. 1 V or less
      Key is inserted to the ignition key cylinder. Pulse generation
      D54-5 (TXCT) - D54-7 (AGND) Output Key code output signal Key is not inserted to the ignition key cylinder. 1 V or less
      Key is inserted to the ignition key cylinder. Pulse generation
  2. Check the main body ECM (multiplex network body ECM).
    G12589424Courtesy of SUBARU OF AMERICA, INC.
    1. Remove the main body ECM (multiplex network body ECM) from the instrument panel junction block ASSY.
    2. Disconnect the connectors D5, D6, and A73 of the main body ECM (multiplex network body ECM).
    3. Measure the resistance and voltage based on the following table.
      Terminal No. (symbol) Input/output Terminal description Conditions Specified condition
      MB-1 - chassis ground Input Battery power supply Always 11 to 14 V
      MB-8 - chassis ground Input IG SW power supply IG SW ON 11 to 14 V
      IG SW Off 1 V or less
      MB-9 - chassis ground Input ACC power supply IG SW ACC 11 to 14 V
      IG SW Off 1 V or less
      MB-11 - chassis ground - Ground Always 1 Ω or less
      MB-32 - chassis ground Input Battery power supply Always 11 to 14 V
      D5-22 - chassis ground Input Unlock warning switch input Key is not inserted to the ignition key cylinder (OFF). 1 V or less
      Key is inserted to the ignition key cylinder (ON). 11 to 14 V
      D6-1 - Chassis ground - Ground Always 1 Ω or less
      A73-4 - chassis ground - Ground Always 1 Ω or less
    4. Reconnect the connector D5, D6, and A73 of the main body ECM (multiplex network body ECM).
    5. Install the main body ECM (multiplex network body ECM) to the instrument panel junction block ASSY
    6. Refer to the table below and measure the resistance and the voltage and check for a pulse.
      Terminal No. (symbol) Input/output Terminal description Conditions Specified condition
      A73-5 - chassis ground Output Key code data revision signal Key is not inserted to the ignition key cylinder. 1 V or less
      Key is inserted to the ignition key cylinder. Pulse generation
      A73-9 - chassis ground Input/output EFI communication IG SW Off 1 V or less
      IG SW ON Pulse generation
      A73-8 - chassis ground Output Transponder key amplifier power supply Key is not inserted to the ignition key cylinder. 1 V or less
      Key is inserted to the ignition key cylinder. 4.5 to 5.5V
      A73-15 - chassis ground Input Key code output signal Key is not inserted to the ignition key cylinder. 1 V or less
      Key is inserted to the ignition key cylinder. Pulse generation
      A73-16 - chassis ground - Transponder key amplifier GND-output short Always 1 Ω or less
      A73-17 - chassis ground Input/output Transponder key ECM communication IG SW Off 1 V or less
      IG SW ON Pulse generation

      *: with transponder key ECM ASSY

  3. Check the transponder key ECM ASSY.
    G12589425Courtesy of SUBARU OF AMERICA, INC.
    1. Disconnect the D64 transponder ECM ASSY connector.
    2. Measure the resistance and voltage based on the following table.
      Terminal No. (symbol) Input/output Terminal description Conditions Specified condition
      A64-1 (+B) - Chassis ground Input Battery power supply Always 11 to 14 V
      A64-5 (GND) - Chassis ground - Ground Always 1 Ω or less
    3. Reconnect the D64 transponder ECM ASSY connector.
    4. Refer to the table below and measure the voltage and check for a pulse.
      Terminal No. (symbol) Input/output Terminal description Conditions Specified condition
      A64-3 (UART) - A64-5 (GND) Input/output Main body ECM communication IG SW Off 1 V or less
      IG SW ON Pulse generation
  4. CHECK ECM
    G12589426Courtesy of SUBARU OF AMERICA, INC.
    1. Refer to the table below and measure the resistance and the voltage and check for a pulse.
      Terminal No. (symbol) Input/output Terminal description Conditions Specified condition
      A33-1 (VBEC2) - A36-4 (GNDEG1) Input Battery power supply IG SW Off 1 V or less
      IG SW ON 11 to 14 V
      A33-2 (BATT) - A36-4 (GNDEG1) Input Battery power supply Always 11 to 14 V
      A34-6 (VBEC1) - A36-4 (GNDEG1) Input Battery power supply IG SW Off 1 V or less
      IG SW ON 11 to 14 V
      A35-25 (IMO1) - A36-4 (GNDEG1) Input/output Main body ECM communication IG SW Off 1 V or less
      IG SW ON Pulse generation
      A36-4 (GNDEG1) - chassis ground - Ground Always 1 Ω or less
scientia non olet · About LEMON Manuals