SEAT BELT WARNING SYSTEM TERMINALS OF ECU


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

    B00403HC01
    *A Main Body ECU (Multiplex Network Body ECU) with 2 Connectors - -
    *1 Main Body ECU (Multiplex Network Body ECU) - -
    *a 2 connectors - -
    A0028JSC01
    *A Main Body ECU (Multiplex Network Body ECU) with 3 Connectors - -
    *1 Main Body ECU (Multiplex Network Body ECU) - -
    *a 3 connectors - -

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

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    2. Reconnect the instrument panel junction block assembly connectors.

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      MB-31 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      MB-32 (IG) - Body ground - Ignition power supply (IG signal) Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      MB-30 (ACC) - Body ground - Ignition power supply (ACC signal) Ignition switch off Below 1 V
      Ignition switch ACC 11 to 14 V
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      MB-13 (LCTY) - Body ground* - Rear door courtesy light switch assembly (LH side) signal Rear door LH closed (OFF) 10 kΩ or higher
      Rear door LH open (ON) Below 1 Ω
      MB-2 (RCTY) - Body ground* - Rear door courtesy light switch assembly (RH side) signal Rear door RH closed (OFF) 10 kΩ or higher
      Rear door RH open (ON) Below 1 Ω

      • *: w/ Rear Seat Belt Warning

  2. CHECK COMBINATION METER ASSEMBLY

    A002CJFN35

    1. Disconnect the F126 combination meter assembly connector.

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F126-1 (B) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      F126-21 (IG+) - Body ground G - Body ground Ignition power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      F126-31 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω
      F126-15 (PBLT) - Body ground L - Body ground Front passenger seat belt buckle switch signal Front passenger seat occupied, seat belt fastened 10 kΩ or higher
      Front passenger seat occupied, seat belt unfastened Below 1 Ω
      F126-12 (RLSB) - Body ground* R - Body ground Rear LH seat belt buckle switch signal Rear LH seat belt fastened 10 kΩ or higher
      Rear LH seat belt unfastened Below 1 Ω
      F126-13 (RCSB) - Body ground* B - Body ground Rear center seat belt buckle switch signal Rear center seat belt fastened 10 kΩ or higher
      Rear center seat belt unfastened Below 1 Ω
      F126-14 (RRSB) - Body ground* P - Body ground Rear RH seat belt buckle switch signal Rear RH seat belt fastened 10 kΩ or higher
      Rear RH seat belt unfastened Below 1 Ω

      • *: w/ Rear Seat Belt Warning

  3. CHECK AIRBAG SENSOR ASSEMBLY

    A002BRBN46
    Terminal No. Terminal Symbol Destination
    M7-10*1 LBE+ Front seat inner belt assembly (driver seat)
    M7-18*1 LBE- Front seat inner belt assembly (driver seat)
    L9-15*2 RBE+ Front seat inner belt assembly (driver seat)
    L9-23*2 RBE- Front seat inner belt assembly (driver seat)

    • *1: for LHD

    • *2: for RHD