METER / GAUGE SYSTEM TERMINALS OF ECU


  1. CHECK COMBINATION METER ASSEMBLY

    A0049UYE02

    1. Disconnect the F1 and F3 combination meter assembly connector.

    2. Measure the voltage, resistance and check for pulses of the wire harness side connector.

      Terminals No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F1-21 (ET) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F1-39 (IG+) - Body ground P - Body ground Ignition switch signal Ignition switch off → ON Below 1 V → 11 to 14 V
      F1-40 (B) - Body ground L - Body ground Battery Always 11 to 14 V
      F3-1 (B) - Body ground R - Body ground Battery Always 11 to 14 V

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

    3. Reconnect the F1 and F3 combination meter assembly connector.

    4. Measure the voltage, resistance and check for pulses of the wire harness side connector.

      Terminals No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F1-1 (RLMT)*2 - Body ground GR - Body ground Rear LH seat belt warning light signal Rear LH seat belt warning light ON → OFF Below 1 V → 11 to 14 V
      F1-2 (RCMT)*2 - Body ground G - Body ground Rear CENTER seat belt warning light signal Rear CENTER seat belt warning light ON → OFF Below 1 V → 11 to 14 V
      F1-3 (RRMT)*2 - Body ground B - Body ground Rear RH seat belt warning light signal Rear RH seat belt warning light ON → OFF Below 1 V → 11 to 14 V
      F1-5 (SI) - Body ground L - Body ground Speed signal (Input)

      Driving at approximately

      20 km/h (12 mph)

      Pulse generation

      (See waveform 1)
      F1-6 (+S) - Body ground SB - Body ground Speed signal (Output)

      Driving at approximately

      20 km/h (12 mph)

      Pulse generation

      (See waveform 1)
      F1-7 (P/SB) - Body ground P - Body ground Front seat inner belt assembly signal (passenger side) Front passenger seat is occupied and its seat belt is unfastened → fastened Below 1 V → 11 to 14 V
      F1-8 (S)*3 - Body ground G - Body ground Fuel sedimenter warning switch signal Fuel filter warning light ON → OFF Below 1 V → 11 to 14 V
      F1-9 (S)*4 - Body ground Y - Body ground Engine oil pressure signal Engine oil pressure warning light ON → OFF Below 1 V → 11 to 14 V
      F1-11 (CHK) - Body ground LG - Body ground Check engine warning light signal Check engine warning light ON → OFF Below 1 V → 11 to 14 V
      F1-14 (-)*6 - Body ground BR - Body ground High beam indicator signal (-) Always Below 1 V
      F1-16 (L) - Body ground G - Body ground Fuel level signal

      Ignition switch ON

      Fuel level is FULL → EMPTY

      		 Below 1 V → 4.5 to 9.0 V
      F1-18 (MSTI) - Body ground V - Body ground Steering pad switch signal Ignition switch ON, up, down, right and left switches on steering pad switch assembly not pushed 4.3 to 5.2 V
      Ignition switch ON, left switch on steering pad switch pushed Below 0.6 V
      Ignition switch ON, up switch on steering pad switch pushed 1.0 to 2.2 V
      Ignition switch ON, down switch on steering pad switch pushed 2.3 to 3.4 V
      Ignition switch ON, right switch on steering pad switch pushed 3.4 to 4.5 V
      F1-19 (+)*6 - Body ground GR - Body ground High beam indicator signal (+) High beam indicator ON → OFF 11 to 14 V → Below 1 V
      F1-20 (ILL+)*6 - Body ground R - Body ground Taillight signal Light control switch off → on Below 1 V → 11 to 14 V
      F1-22 (MSCL)*5 - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      F1-23 (MSCH)*5 - Body ground P - Body ground CAN communication line Ignition switch ON Pulse generation
      F1-24 (RLSB)*2 - Body ground V - Body ground Rear seat inner belt assembly signal (LH side) Rear LH seat belt is unfastened → fastened Below 1 V → 11 to 14 V
      F1-25 (RCSB)*2 - Body ground R - Body ground Rear seat inner belt assembly signal (Center side) Rear CENTER seat belt is unfastened → fastened Below 1 V → 11 to 14 V
      F1-26 (RRSB)*2 - Body ground BE - Body ground Rear seat inner belt assembly signal (RH side) Rear RH seat belt is unfastened → fastened Below 1 V → 11 to 14 V
      F1-27 (OILW)*3 - Body ground W - Body ground Oil level sensor signal Ignition switch ON 11 to 14 V
      F1-28 (MSM+) - Body ground L - Body ground Steering pad switch signal Ignition switch ON, enter, trip and back switches on steering pad switch not pushed 4.3 to 5.2 V
      Ignition switch ON, enter switch on steering pad switch pushed Below 0.6 V
      Ignition switch ON, trip switch on steering pad switch pushed 1.0 to 2.2 V
      Ignition switch ON, back switch on steering pad switch pushed 2.3 to 3.4 V
      F1-31 (CANL) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      F1-32 (CANH) - Body ground G - Body ground CAN communication line Ignition switch ON Pulse generation
      F1-34 (TX1-) - Body ground B- Body ground Ambient temperature sensor signal Ignition switch ON 4.5 to 5.5 V
      F1-35 (TX1+) - Body ground W - Body ground Ambient temperature sensor ground Always Below 1 Ω
      F3-3 (HAZ) - Body ground L - Body ground Hazard warning signal switch signal Hazard warning signal switch off 11 to 14 V
      Hazard warning signal switch on Below 1 Ω
      F3-6 (TAIL)*6 - Body ground LG - Body ground Tail light indicator signal Light control switch on → off Below 1 V → 11 to 14 V
      F3-7 (LR) - Body ground V - Body ground Right turn signal

      Ignition switch ON

      Right turn indicator light OFF → ON

      		 Below 1 V → 11 to 14 V
      F3-9 (ER) - Body ground B - Body ground Turn signal switch RH signal Turn signal switch RH on Below 1 V
      Turn signal switch RH off 11 to 14 V
      F3-10 (EL) - Body ground Y - Body ground Turn signal switch LH signal Turn signal switch LH on Below 1 V
      Turn signal switch LH off 11 to 14 V
      F3-11 (S)*6 - Body ground SB - Body ground Rear fog signal

      Ignition switch ON

      Rear fog switch off → on

      		 Below 1 V → 11 to 14 V
      F3-12 (FOG)*1, *6 - Body ground BE - Body ground Front fog signal

      Ignition switch ON

      Front fog switch off → on

      		 Below 1 V → 11 to 14 V
      F3-13 (LL) - Body ground LG - Body ground Left turn signal

      Ignition switch ON

      Left turn indicator light OFF → ON

      		 Below 1 V → 11 to 14 V

      • *1: w/ Fog Light

      • *2: w/ Rear Seat Belt Warning System

      • *3: for 1ND-TV

      • *4: except 1ND-TV with DPF

      • *5: for TFT Display Type and Radio and Display Type

      • *6: for Segment Display Type

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


      1. A0047VME01

        Waveform 1: Using an oscilloscope

        Terminal Connections

        F1-6 (+S) and Body ground

        F1-5 (SI) and Body ground
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Driving at approximately 20 km/h (12 mph)

        Tech Tips

        As the vehicle speed increases, the cycle of the signal waveform narrows.

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

    A004BH6E02
    Text in Illustration
    *A for LHD *B for RHD
    *1 Instrument Panel Junction Block Assembly *2

    Main Body ECU

    (Multiplex Network Body ECU)

    1. Remove the main body ECU (multiplex network body ECU).

    2. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground None - Body ground Ground Always Below 1 Ω
      MB-29 (ACC) - Body ground None - Body ground Ignition power supply (ACC signal) Ignition switch ACC 11 to 14 V
      MB-30 (BECU) - Body ground None - Body ground +B (power system signal system) power supply Always 11 to 14 V
      MB-32 (IG) - Body ground None - Body ground Ignition power supply (IG signal) Ignition switch ON 11 to 14 V

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

    3. Install the main body ECU (multiplex network body ECU).

    4. Measure the voltage between each terminal of the wire harness side connectors and body ground.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3A-28 (PKB) - Body ground R - Body ground Parking brake signal Parking brake warning light ON → OFF Below 1 V → 11 to 14 V
      3D-34 (DBKL) - Body ground W - Body ground Front seat inner belt assembly signal (driver side) Driver seat belt warning light OFF → ON Below 1 V → 11 to 14 V
      F76-13 (CANL) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      F76-14 (CANH) - Body ground R - Body ground CAN communication line Ignition switch ON Pulse generation

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

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

    A004BGRE05
    Text in Illustration
    *A for LHD *B for RHD
    *1 Instrument Panel Junction Block Assembly *2

    Main Body ECU

    (Multiplex Network Body ECU)

    1. Remove the main body ECU (multiplex network body ECU).

    2. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground None - Body ground Ground Always Below 1 Ω
      MB-29 (ACC) - Body ground None - Body ground Ignition power supply (ACC signal) Ignition switch ACC 11 to 14 V
      MB-30 (BECU) - Body ground None - Body ground +B (power system signal system) power supply Always 11 to 14 V
      MB-32 (IG) - Body ground None - Body ground Ignition power supply (IG signal) Ignition switch ON 11 to 14 V

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

    3. Install the main body ECU (multiplex network body ECU).

    4. Measure the voltage between each terminal of the wire harness side connectors and body ground.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3A-28 (PKB) - Body ground R - Body ground Parking brake signal Parking brake warning light ON → OFF Below 1 V → 11 to 14 V
      3D-34 (DBKL) - Body ground W - Body ground Front seat inner belt assembly signal (driver side) Driver seat belt warning light OFF → ON Below 1 V → 11 to 14 V
      F76-13 (CANL) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      F76-14 (CANH) - Body ground R - Body ground CAN communication line Ignition switch ON Pulse generation

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

  4. COMBINATION METER INTERNAL CIRCUIT

    A0047NAE01
    A0048DOE01
    A004BJME01
    A0047IAE01
    Connectors
    Terminal No. Wire Harness Side
    F1 1 Telltale light assembly (Rear Seat LH)*1
    2 Telltale light assembly (Rear Seat CENTER)*1
    3 Telltale light assembly (Rear Seat RH)*1
    5 Brake actuator assembly (skid control ECU)
    6 Other ECU
    7 Occupant detection sensor and Front seat inner belt assembly (Front passenger side)
    8 Fuel sedimenter warning switch*2
    9 Engine oil pressure switch assembly*6
    11 ECM
    14 Body ground
    16 Fuel sender gauge assembly
    18 Steering pad switch assembly*7
    19 H-LP LH HI fuse*9
    20 Panel fuse*9
    21 Body ground
    22 CAN communication line*8
    23 CAN communication line*8
    24 Rear seat inner belt assembly LH*1
    25 Rear seat inner belt assembly CENTER*1
    26 Rear seat inner belt assembly RH*1
    27 Engine oil level sensor assembly*2
    28 Steering pad switch assembly*7
    31 CAN communication line
    32 CAN communication line
    34 Thermistor assembly
    35 Thermistor assembly
    39

    IG2 relay*3

    Engine stop and start ECU*4
    40 Battery
    F3 1 Battery
    3 Hazard warning signal switch assembly
    6 Panel fuse*9
    7 Turn signal light RH
    9 Headlight dimmer switch assembly (Turn signal switch)
    10 Headlight dimmer switch assembly (Turn signal switch)
    11 FOG RR relay*9
    12 FOG FR relay*5, *9
    13 Turn signal light LH

    • *1: w/ Rear Seat Belt Warning System

    • *2: for 1ND-TV

    • *3: w/o Stop and Start System

    • *4: w/ Stop and Start System

    • *5: w/ Fog Light

    • *6: except 1ND-TV with DPF

    • *7: for TFT Display Type

    • *8: for TFT Display Type and Radio and Display Type

    • *9: for Segment Display Type