LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2018 >> Camry LE >> Repair and Diagnosis >> Restraints >> Seat Belts >> Seat Belt Warning System - Diagnostics & Symptom Tests (Except Hybrid) >> Seat Belt Warning System >> Terminals Of Ecu [06/2017 - 09/2019] >> Terminals Of Ecu [06/2017 - 09/2019]

Terminals Of Ecu [06/2017 - 09/2019]

  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY751379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

      Refer to REMOVAL [06/2017 - 10/2020]

    2. Reconnect the instrument panel junction block assembly connectors.
    3. Measure the resistance and voltage according to the value(s) in the table below.

      HINT: 

      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 ON 11 to 14 V
      Ignition switch off Below 1 V
      MB-30 (ACC) - Body ground - Ignition power supply (ACC signal) Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      MB-2 (RCTY) - Body ground - Rear door courtesy light switch RH input Rear door LH closed (OFF) 10 kΩ or higher
      Rear door LH open (ON) Below 1 Ω
      MB-13 (LCTY) - Body ground - Rear door courtesy light switch LH input Rear door RH closed (OFF) 10 kΩ or higher
      Rear door RH open (ON) Below 1 Ω
  2. CHECK COMBINATION METER ASSEMBLY 
    GTY745869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K21 combination meter assembly connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.

      HINT: 

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K21-40 (B) - Body ground LA-B - Body ground Battery power supply Always 11 to 14 V
      K21-39 (IG+) - Body ground LA-GR Body ground Ignition power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      K21-21 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω
      K21-24 (RLSB) - Body ground SB - 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
      K21-26 (RRSB) - Body ground LG - 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
      K21-25 (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
    3. Reconnect the K21 combination meter assembly connector.
    4. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K21-18 (RLMT) - Body ground BE - Body ground Rear LH seat belt warning light output signal Ignition switch ON, rear seat belt warning light (LH) off 11 to 14 V
      Ignition switch ON, rear seat belt warning light (LH) on Below 1 V
      K21-20 (RRMT) - Body ground G - Body ground Rear center seat belt warning light output signal Ignition switch ON, rear seat belt warning light (center) off 11 to 14 V
      Ignition switch ON, rear seat belt warning light (center) on Below 1 V
      K21-19 (RCMT) - Body ground R - Body ground Rear RH seat belt warning light output signal Ignition switch ON, rear seat belt warning light (RH) off 11 to 14 V
      Ignition switch ON, rear seat belt warning light (RH) on Below 1 V
  3. AIRBAG SENSOR ASSEMBLY 
    GTY758144Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. Terminal Symbol Destination
    R32-28 LBE+ Front seat inner belt assembly LH
    R32-27 LBE- Front seat inner belt assembly LH
  4. CHECK OCCUPANT DETECTION ECU (for TMC Made) 
    GTY769501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      a2-10 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
      a2-6 (IG2) - a2-10 (GND) B - W-B Power source Ignition switch ON 11 to 14 V
      a2-9 (BGND) - a2-10 (GND) P - W-B Front passenger buckle switch ground Always Below 1 V
      a2-7 (BSW) - a2-9 (BGND) G - P Front passenger buckle switch signal Always Pulse generation
      a1-1 (SVC1) - a1-5 (SGD1) R - G Front occupant classification sensor LH power supply Ignition switch ON 11 to 14 V
      a1-2 (SVC3) - a1-6 (SGD3) GR - W Rear occupant classification sensor LH power supply Ignition switch ON 11 to 14 V
      a1-3 (SIG1) - a1-5 (SGD1) P - G Front occupant classification sensor LH signal Ignition switch ON Pulse generation
      a1-4 (SIG3) - a1-6 (SGD3) SB - W Rear occupant classification sensor LH signal Ignition switch ON Pulse generation
      a1-5 (SGD1) - a2-10 (GND) G - W-B Front occupant classification sensor LH ground Always Below 1 V
      a1-6 (SGD3) - a2-10 (GND) W - W-B Rear occupant classification sensor LH ground Always Below 1 V
  5. CHECK OCCUPANT DETECTION ECU (for TMMK Made) 
    GTY744908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      a6-10 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
      a6-6 (IG) - a6-10 (GND) B - W-B Power source Ignition switch ON 11 to 14 V
      a6-9 (BGND) - a6-10 (GND) P - W-B Front passenger buckle switch ground Always Below 1 V
      a6-7 (BSW) - a6-9 (BGND) G - P Front passenger buckle switch signal Always Pulse generation
      a7-1 (SVC1) - a7-5 (SGD1) R - G Front occupant classification sensor LH power supply Ignition switch ON 11 to 14 V
      a7-2 (SVC3) - a7-6 (SGD3) GR - W Rear occupant classification sensor LH power supply Ignition switch ON 11 to 14 V
      a7-3 (SIG1) - a7-5 (SGD1) P - G Front occupant classification sensor LH signal Ignition switch ON Pulse generation
      a7-4 (SIG3) - a7-6 (SGD3) SB - W Rear occupant classification sensor LH signal Ignition switch ON Pulse generation
      a7-5 (SGD1) - a6-10 (GND) G - W-B Front occupant classification sensor LH ground Always Below 1 V
      a7-6 (SGD3) - a6-10 (GND) W - W-B Rear occupant classification sensor LH ground Always Below 1 V
scientia non olet · About LEMON Manuals