SEAT BELT WARNING SYSTEM TERMINALS OF ECU

  1. CHECK COMBINATION METER ASSEMBLY

    E161130E21

    1. Disconnect the G3 meter connector.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G3-1 (EP) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      G3-25 (B) - Body ground

      L - Body ground

      Combination meter assembly B line

      Always

      11 to 14 V

      G3-27 (IG+) - Body ground

      R - Body ground

      Combination meter assembly IG+ line

      Engine switch on (IG)

      11 to 14 V

      G3-39 (CANL) - Body ground

      W - Body ground

      CAN communication line

      Engine switch off

      200 Ω or higher

      G3-40 (CANH) - Body ground

      LG - Body ground

      CAN communication line

      Engine switch off

      200 Ω or higher

    3. Reconnect the G3 meter connector.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G3-12 (P/SB) - Body ground

      L - Body ground

      Front passenger seat belt signal

      • Engine switch on (IG)

      • Front passenger seat occupied

      • Seat belt fastened

      11 to 14 V

      • Engine switch on (IG)

      • Front passenger seat occupied

      • Seat belt unfastened

      Alternating between 11 to 14 V and below 1 V

  2. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    C263268N01

    Terminal No.

    Symbol

    Description

    R1-10

    LBE+

    Front seat inner belt assembly LH (Seat belt buckle switch LH)

    R1-18

    LBE-

    Front seat inner belt assembly LH (Seat belt buckle switch LH)

    G1-13

    CANH

    CAN communication line

    G1-22

    CANL

    CAN communication line
  3. B235899C06

    *1

    Main Body ECU (Multiplex Network Body ECU)

    -

    -

    CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    1. Remove the main body ECU from the driver side junction block assembly.

      Click here

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A-11 (GND1) - Body ground

      None - Body ground

      Ground

      Always

      Below 1 Ω

      G46-3 (GND2) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      A-30 (BECU) - Body ground

      None - Body ground

      Battery power supply (for CPU)

      Always

      11 to 14 V

      A-31 (ALTB) - Body ground

      None - Body ground

      Battery power supply (for indicator)

      Always

      11 to 14 V

      A-29 (ACC) - Body ground

      None - Body ground

      ACC power supply

      Engine switch on (ACC)

      11 to 14 V

      A-32 (IG) - Body ground

      None - Body ground

      IG power supply

      Engine switch on (IG)

      11 to 14 V

    3. Install the main body ECU to the driver side junction block assembly.

      Click here

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A-12 (PKB) - Body ground

      None - Body ground

      Parking brake switch signal

      Engine switch on (IG), parking brake switch off

      11 to 14 V

      Engine switch on (IG), parking brake switch on

      Below 1.5 V