SEAT BELT WARNING SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY


    1. Disconnect the L23 combination meter assembly connector.

      A0041KLE14

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L23-24 (SW) - Body ground P - Body ground Front passenger side seat belt buckle switch signal Front passenger side seat occupied, seat belt fastened 10 kΩ or higher
      L23-24 (SW) - Body ground P - Body ground Front passenger side seat belt buckle switch signal Front passenger side seat occupied, seat belt not fastened Below 1 Ω
      L23-30 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Reconnect the L23 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
      L23-19 (IG+) - Body ground L - Body ground Power switch power supply Power switch off Below 1 V
      L23-19 (IG+) - Body ground L - Body ground Power switch power supply Power switch on (IG) 11 to 14 V
      L23-21 (PBLT) - Body ground Y - Body ground Front passenger side seat belt warning light signal Power switch on (IG), front passenger side seat occupied, seat belt fastened 11 to 14 V
      L23-21 (PBLT) - Body ground Y - Body ground Front passenger side seat belt warning light signal Power switch on (IG), front passenger side seat occupied, seat belt not fastened Alternates between 11 to 14 V and below 1 V

      If the result is not as specified, the combination meter assembly may have a malfunction.

  2. TELLTALE LIGHT ASSEMBLY

    A00442NE01

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      M2-6 (IG+) - Body ground L - Body ground Power switch power supply Power switch on (IG) 11 to 14 V
      M2-6 (IG+) - Body ground L - Body ground Power switch power supply Power switch off Below 1 V
      M2-3 (PBEW) - Body ground W - Body ground Front passenger side seat belt warning light signal Front passenger side seat occupied, seat belt fastened 11 to 14 V
      M2-3 (PBEW) - Body ground W - Body ground Front passenger side seat belt warning light signal Front passenger side seat occupied, seat belt not fastened Alternates between 11 to 14 V and below 1 V

      • If the result is not as specified, the telltale light assembly may have a malfunction.

  3. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    A004337E44
    Text in Illustration
    *A for LHD *B for RHD

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2B-14 (DBKL) - Body ground P - Body ground Driver side seat belt buckle Driver side seat belt fastened Below 1 V
      2B-14 (DBKL) - Body ground P - Body ground Driver side seat belt buckle Driver side seat belt not fastened 11 to 14 V

      If the result is not as specified, the main body ECU (multiplex network body ECU) may have a malfunction.