SEAT BELT WARNING SYSTEM TERMINALS OF ECU


  1. CHECK COMBINATION METER ASSEMBLY

    A01MI9IE01

    1. Disconnect the G13 combination meter assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G13-21 (IG+) - Body ground BE - Body ground IG power supply Power switch on (IG) → off 11 to 14 V → Below 1 V
      G13-22 (B) - Body ground GR - Body ground Battery power supply Power switch off 11 to 14 V
      G13-28 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω

    3. Reconnect the G13 combination meter assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G13-14 (PBKL) - Body ground L - Body ground Front passenger seat belt buckle switch signal Power switch on (IG), front passenger seat occupied, seat belt unfastened → fastened 11 to 14 V → Below 1 V
      G13-10 (RRSB) - Body ground P - Body ground Rear RH seat belt buckle switch signal Rear RH seat belt unfastened → fastened 11 to 14 V → Below 1 V
      G13-12 (RLSB) - Body ground G - Body ground Rear LH seat belt buckle switch signal Rear LH seat belt unfastened → fastened 11 to 14 V → Below 1 V
      G13-26 (CANH) LG - - -
      G13-27 (CANL) W - - -

  2. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    A01MHR4C01
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.


    2. Reconnect the instrument panel junction block assembly connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      MB-30 (ACC) - Body ground - ACC power supply Power switch on (ACC) → off 11 to 14 V → Below 1 V
      MB-31 (BECU) - Body ground - Battery power supply Power switch off 11 to 14 V
      MB-32 (IG) - Body ground - IG power supply Power switch on (IG) → off 11 to 14 V → Below 1 V

    4. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.


    5. Measure the voltage and check for pulses according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      4D-25 (LCTY) - Body ground V - Body ground Rear door courtesy light switch LH input Rear door LH closed (OFF) Pulse generation
      Rear door LH open (ON) Below 1 V
      4B-17 (RCTY) - Body ground GR - Body ground Rear door courtesy light switch RH input Rear door RH closed (OFF) Pulse generation
      Rear door RH open (ON) Below 1 V

  3. CHECK AIRBAG SENSOR ASSEMBLY

    A01MJ7DE01
    Terminal No. Terminal Symbol Destination
    P1-10 (for LHD) LBE+ Front seat inner belt assembly LH
    P1-18 (for LHD) LBE- Front seat inner belt assembly LH
    Q1-15 (for RHD) RBE+ Front seat inner belt assembly RH
    Q1-23 (for RHD) RBE- Front seat inner belt assembly RH