METER / GAUGE SYSTEM TERMINALS OF ECU


  1. CHECK COMBINATION METER

    A004QQ5E03

    1. Measure the resistance and voltage, waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D66-3 (+S) - Body ground Y - Body ground Speed signal (output) Vehicle being driven approximately 20 km/h (12 mph) Pulse generation (See waveform 1)
      D66-5 (SI) - Body ground V - Body ground Speed signal (input) Vehicle being driven approximately 20 km/h (12 mph) Pulse generation (See waveform 1)
      D66-10 (SW) - Body ground G - Body ground Brake fluid level warning light signal Ignition switch ON, brake system warning light (red indicator) on Below 1 V
      Ignition switch ON, brake system warning light (red indicator) off 11 to 14 V
      D66-11 (PKB1) - Body ground

      L - Body ground*1

      P - Body ground*2

      		 Passenger side seat belt condition signal Ignition switch ON, front passenger side seat belt warning light off 11 to 14 V
      Ignition switch ON, front passenger side seat belt warning light on Below 1 V
      D66-12 (TX+) - Body ground B - Body ground Parking brake signal Ignition switch ON, electric parking brake switch off Pulse generation
      Ignition switch ON, electric parking brake switch on Pulse generation
      D66-13 (MSD) - Body ground Y - Body ground Rear seat inner belt signal (LH side) Rear LH seat belt unfastened Below 1 V
      Rear LH seat belt fastened 11 to 14 V
      D66-14 (MSTI) - Body ground P - Body ground Rear seat inner belt signal (Center) Rear center seat belt unfastened Below 1 V
      Rear center seat belt fastened 11 to 14 V
      D66-15 (MSFM) - Body ground B - Body ground Rear seat inner belt signal (RH side) Rear RH seat belt unfastened Below 1 V
      Rear RH seat belt fastened 11 to 14 V
      D66-16 (OILW) - Body ground L - Body ground Engine oil level signal Ignition switch ON, ENGINE OIL LOW displayed Below 1 V
      Ignition switch ON, ENGINE OIL LOW not displayed 11 to 14 V
      D66-17 (S) - Body ground Y - Body ground Engine oil pressure signal Engine oil pressure switch on Below 1 V
      Engine oil pressure switch off 11 to 14 V
      D66-19 (B) - Body ground L - Body ground Turn signal R Ignition switch ON, turn signal switch neutral position Below 1 V
      Ignition switch ON, turn signal switch turned to right Alternating between below 1 V and 11 to 14 V
      D66-20 (B) - Body ground Y - Body ground Turn signal L Ignition switch ON, turn signal switch neutral position Below 1 V
      Ignition switch ON, turn signal switch turned to left Alternating between below 1 V and 11 to 14 V
      D66-21 (ET) - Body ground W-B - Body ground Ground Always Below 1 V
      D66-22 (CANH) - Body ground L - Body ground CAN communication signal Ignition switch off 200 Ω or higher
      D66-23 (CANL) - Body ground W - Body ground CAN communication signal Ignition switch off 200 Ω or higher
      D66-24 (E) - Body ground BR - Body ground Fuel sender gauge ground Always Below 1 Ω
      D66-25 (TX1+) - Body ground G - Body ground Cooler (ambient temperature sensor) thermistor ground Always Below 1 Ω
      D66-26 (TIRE) - Body ground*3 V - Body ground Tire pressure warning light signal Ignition switch ON, tire pressure warning light off Below 1 V
      Ignition switch ON, tire pressure warning light on 11 to 14 V
      D66-28 (S) - Body ground R - Body ground Fuel sedimenter signal Ignition switch ON, DRAIN WATER FUEL FILTER displayed Below 1 V
      Ignition switch ON, DRAIN WATER FUEL FILTER not displayed 11 to 14 V
      D66-29 (EFI) - Body ground P - Body ground MIL (Check engine indicator light) signal Ignition switch ON, MIL on Below 1 V
      Ignition switch ON, MIL off 11 to 14 V
      D66-30 (CHG-) - Body ground Y - Body ground CHARGE warning light Ignition switch ON, CHARGE warning light on Below 1 V
      Ignition switch ON, CHARGE warning light off 11 to 14 V
      D66-32 (SW1) - Body ground GR - Body ground Spiral cable signal Ignition switch ON, steering pad DISP switch signal off Below 1 V
      Ignition switch ON, steering pad DISP switch signal on 11 to 14 V
      D66-33 (TEMP) - Body ground W - Body ground Cooler (ambient temperature sensor) thermistor signal Outside temperature 25°C (77°F) 1.6 to 1.8 Ω*4
      D66-34 (RRMT) - Body ground B - Body ground Rear seat belt RH warning light signal Rear seat belt RH fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat belt RH unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      D66-35 (RCMT) - Body ground P - Body ground Rear seat center belt warning light signal Rear seat center belt fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat center belt unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      D66-36 (RLMT) - Body ground Y - Body ground Rear seat belt LH warning light signal Rear seat belt LH fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      D66-37 (L) - Body ground V - Body ground Fuel sender gauge signal Ignition switch ON Below 1 V
      Fuel F (full tank) → E (empty) 4.5 to 9 V
      D66-39 (IG+) - Body ground P - Body ground Ignition switch signal Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      D66-40 (B) - Body ground W - Body ground Battery Always 11 to 14 V

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Tire Pressure Warning System

      • *4: The standard value changes according to the outside temperature.


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

    2. A004SPVE01

      Using an oscilloscope, check waveform 1.

      Measurement Condition
      Item Condition
      Terminal No. (Symbol)

      D66-3 (+S) - Body ground

      D66-5 (SI) - Body ground
      Tool setting 5 V/DIV., 20 ms./DIV.
      Condition Being driven at approximately 20 km/h (12 mph)

      Tech Tips

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

  2. CHECK COMBINATION METER INNER CIRCUIT

    A004PL8E02
    A004TK2E01
    A004SYRE02
    A004NF2E02

    • EPB*: Electric Parking Brake System

    • *1: for LHD

    • *2: for RHD

    • *3: w/ Cruise Control System

    • *4: w/ Dynamic Radar Cruise Control System

    • *5: w/ Pre-crash Safety System

    • *6: w/ Adaptive Front-lighting System

    • *7: w/ SIL Indicator (UP/DOWN)

    • *8: for Manual Transaxle

    • *9: w/ Tire Pressure Warning System

    • *10: w/ Front Fog Light

    • *11: w/ Rear Fog Light

    Connectors
    Terminal No. Wire Harness Side
    D66 1 -
    2 -
    3 Each part that uses the vehicle speed signal
    4 -
    5 Brake actuator assembly (skid control ECU)
    6 -
    7 -
    8 -
    9 -
    10 Brake fluid level warning switch
    11 Separate type front seat cushion pad (occupant detection sensor)
    12 Parking brake with bracket actuator assembly
    13 Rear seat inner with center belt assembly LH
    14 Rear seat inner with center belt assembly LH
    15 Rear seat 3 point type belt assembly RH
    16 Engine oil level sensor
    17 Engine oil pressure switch assembly
    18 -
    19 Turn signal flasher assembly
    20 Turn signal flasher assembly
    21 Ground
    22 CAN communication line
    23 CAN communication line
    24 Fuel sender gauge assembly
    25 Cooler (ambient temperature sensor) thermistor
    26 Tire pressure monitor receiver assembly*
    27 -
    28 Level warning switch
    29 ECM
    30 Generator
    31 -
    32 Steering pad switch assembly
    33 Cooler (ambient temperature sensor) thermistor
    34 Telltale light assembly
    35 Telltale light assembly
    36 Telltale light assembly
    37 Fuel sender gauge assembly
    38 -
    39 IG2 relay
    40 Battery

    • *: w/ Tire Pressure Warning System