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Terminals Of Ecu

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  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Combination Meter Assembly Connector Terminals
    G04412626Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COMBINATION METER ASSEMBLY CONNECTOR REFERENCE

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    +B (C9-1) - Body ground R - Body ground Battery Always 10 to 14 V
    SIGNAL EARTH (C9-2) - Body ground W-B - Body ground Ground Always Below 1
    SPEED SIGNAL (C9-3) - Body ground W - Body ground Vehicle speed signal (input) Ignition switch ON and wheel turning slowly Pulse generation (see WAVEFORM 1 )
    FUEL EARTH (C9-4) - Body ground Y-B - Body ground Ground Always Below 1
    SPEED SIGNAL (C9-6) - Body ground R-Y - Body ground Vehicle speed signal (input) Ignition switch ON and wheel turning slowly Pulse generation (see WAVEFORM 1 )
    TACHO (C9-7) - Body ground B-W - Body ground Tachometer signal Idling Pulse generation (see WAVEFORM 2 )
    FUEL SENDER (C9-8) - Body ground O - Body ground Fuel level signal Ignition switch ON, fuel level FULL --> EMPTY Below 1 V --> 4 to 7 V
    TEMP IMPUT (C9-9) - Body ground GR-B - Body ground Engine coolant temperature Ignition switch ON, engine coolant temperature 90°C (194°F) Pulse generation (see WAVEFORM 3 )
    D-BELT (C9-10) - Body ground B-O - Body ground Seat belt condition signal (Driver side) D-BELT indicator light ON Below 1 V
    D-BELT indicator light OFF 10 to 14 V
    KEY UNLOCK (C9-11) - Body ground G-B - Body ground Key switch condition signal Key inserted Below 1 V
    Key removed 10 to 14 V
    D DOOR INPUT (C9-12) - Body ground G-Y - Body ground Driver side door open Driver side door open Below 1 V
    Driver side door closed 10 to 14 V
    CHG- (C9-16) - Body ground GR - Body ground Change signal Ignition switch ON 10 to 14 V
    Ignition switch OFF Below 1 V
    MIL (C9-17) - Body ground BR - Body ground MIL signal MIL ON Below 1 V
    MIL OFF 10 to 14 V
    ALL DOOR INPUT (C9-18) - Body ground G-W - Body ground All door condition signal All doors open Below 1 V
    All doors closed 10 to 14 V
    4P OUT (C9-19) - Body ground V-W - Body ground Vehicle speed signal (Input) Ignition switch ON and wheel turning slowly Pulse generation (see WAVEFORM 1 )
    ILL- (C9-20) - Body ground BR-W - Body ground Ground Always Below 1
    IGN+ (C9-21) - Body ground V - Body ground Ignition switch signal (ON) Ignition switch OFF Below 1 V
    Ignition switch ON 10 to 14 V
    TIRE PRESSURE (C9-23) - Body ground L - Body ground Tire pressure signal Tire pressure indicator light ON 6.7 to 12 V
    Tire pressure indicator light OFF Below 1 V
    CRUISE (C9-24) - Body ground LG - Body ground Cruise signal Cruise indicator ON Below 1 V
    Cruise indicator OFF 10 to 14 V
    OIL PRESSURE (C9-25) - Body ground LG-B - Body ground Oil pressure signal Oil pressure warning light ON Below 1 V
    Oil pressure warning light OFF 10 to 14 V
    TURN R (C9-27) - Body ground L-Y - Body ground Turn signal R Ignition switch ON, turn signal RH indicator OFF Below 1 V
    Ignition switch ON, turn signal RH indicator ON 10 to 14 V
    TURN L (C9-28) - Body ground L-B - Body ground Turn signal L Ignition switch ON, turn signal LH indicator OFF Below 1 V
    Ignition switch ON, turn signal LH indicator ON 10 to 14 V
    HEAD (C9-32) - Body ground R-B - Body ground HEAD light signal HEAD warning light ON Below 1 V
    HEAD warning light OFF 10 to 14 V
    AIRBAG (C9-33) - Body ground B-Y - Body ground AIRBAG signal AIRBAG warning light ON Below 1 V
    AIRBAG warning light OFF 10 to 14 V
    AUTO LSD (C9-35) - Body ground LG-R - Body ground AUTO LSD signal AUTO LSD indicator light ON Below 1 V
    AUTO LSD indicator light OFF 10 to 14 V
    SLIP (C9-36) - Body ground R-W - Body ground SLIP signal SLIP warning light ON Below 1 V
    SLIP warning light OFF 10 to 14 V
    VSC OFF (C9-37) - Body ground L-W - Body ground VSC OFF signal VSC OFF indicator ON Below 1 V
    VSC OFF indicator OFF 10 to 14 V
    VSC TRAC (C9-38) - Body ground Y - Body ground VSC TRAC signal VSC TRAC indicator ON Below 1 V
    VSC TRAC indicator OFF 10 to 14 V
    A/T OIL TEMP (C9-39) - Body ground P - Body ground A/T oil temperature signal A/T OIL TEMP warning light ON Below 1 V
    A/T OIL TEMP warning light OFF 10 to 14 V
    ILL+ (C9-40) - Body ground G - Body ground Illumination signal Illumination switch OFF, rheostat maximum Below 1 V
    Illumination switch ON (wake up), rheostat maximum 10 to 14 V
    A/T P (C10-1) - Body ground G-B - Body ground A/T shift position signal (P) A/T P indicator OFF Below 1 V
    A/T P indicator ON 10 to 14 V
    A/T R (C10-2) - Body ground R-W - Body ground A/T shift position signal (R) A/T R indicator OFF Below 1 V
    A/T R indicator ON 10 to 14 V
    A/T N (C10-3) - Body ground L-W - Body ground A/T shift position signal (N) A/T N indicator OFF Below 1 V
    A/T N indicator ON 10 to 14 V
    A/T D (C10-4) - Body ground W - Body ground A/T shift position signal (D) A/T D indicator OFF Below 1 V
    A/T D indicator ON 10 to 14 V
    A/T 4 (C10-5) - Body ground B - Body ground (1)
    Y - Body ground (2)    		 A/T shift position signal (4) A/T 4 indicator OFF Below 1 V
    A/T 4 indicator ON 10 to 14 V
    A/T 3 (C10-6) - Body ground Y - Body ground (1)
    R-Y - Body ground (2)    		 A/T shift position signal (3) A/T 3 indicator OFF Below 1 V
    A/T 3 indicator ON 10 to 14 V
    A/T 2 (C10-7) - Body ground V - Body ground (1)
    G-Y - Body ground (2)    		 A/T shift position signal (2) A/T 2 indicator OFF Below 1 V
    A/T 2 indicator ON 10 to 14 V
    A/T L (C10-8) - Body ground G-Y - Body ground A/T shift position signal (L) A/T L indicator OFF Below 1 V
    A/T L indicator ON 10 to 14 V
    ACTIVE ABS (C10-9) - Body ground O - Body ground ACTIVE ABS signal ACTIVE ABS warning light ON Below 1 V
    ACTIVE ABS warning light OFF 10 to 14 V
    ACTIVE BRAKE (C10-10) - Body ground B-W - Body ground ACTIVE BRAKE signal ACTIVE BRAKE warning light ON Below 1 V
    ACTIVE BRAKE warning light OFF 10 to 14 V
    BRAKE LEVEL (C10-11) - Body ground LG - Body ground BRAKE signal BRAKE warning light ON Below 1 V
    BRAKE warning light OFF 10 to 14 V
    BEAM+ (C10-12) - Body ground P - Body ground Hi-Beam signal Hi-Beam OFF Below 1 V
    Hi-Beam ON 10 to 14 V
    DAC (C10-13) - Body ground L-B - Body ground DAC TRAC signal DAC TRAC warning light ON Below 1 V
    DAC TRAC warning light OFF 10 to 14 V
    RR DIFF LOCK (C10-14) - Body ground L-Y - Body ground RR DIFF LOCK signal RR DIFF LOCK warning light ON Below 1 V
    RR DIFF LOCK warning light OFF 10 to 14 V
    4LO (C10-16) - Body ground BR-W - Body ground 4LO TRAC signal 4LO indicator light ON Below 1 V
    4LO indicator light OFF 10 to 14 V
    4WD (C10-15) - Body ground R - Body ground 4WD signal 4WD indicator OFF Below 1 V
    4WD indicator ON 10 to 14 V
    (1) 1GR-FE
    (2) 2TR-FE
    1. Waveform 1: Using an oscilloscope
      WAVEFORM REFERENCE TABLE

      Item Condition
      Tool setting 5 V/DIV., 10 ms/DIV
      Vehicle condition Engine idle speed
      Fig 2: Identifying Waveform 1
      G04412627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2: Using an oscilloscope
      WAVEFORM REFERENCE TABLE

      Item Condition
      Tool setting 5 V/DIV., 20 ms/DIV
      Vehicle condition Driving at approx. 20 km/h (12 mph)

      HINT:

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

      Fig 3: Identifying Waveform 2
      G04412628Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Waveform 3: Using an oscilloscope
      WAVEFORM REFERENCE TABLE

      Item Condition
      Tool setting 5 V/DIV., 0.1 sec./DIV
      Vehicle condition Ignition switch ON

      HINT:

      A changes in accordance with the engine coolant temperature.

      COOLANT TEMPERATURE SPECIFICATION

      Coolant temperature Below 30° Approximately 75°C Above 90°
      A Approximately 16 ms Approximately 204 ms Approximately 262 ms
      Fig 4: Identifying Waveform 3
      G04412629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. COMBINATION METER INNER CIRCUIT 
    Fig 5: Combination Meter Inner Circuit Diagram (1 Of 4)
    G04412630Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 6: Combination Meter Inner Circuit Diagram (2 Of 4)
    G04412631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 7: Combination Meter Inner Circuit Diagram (3 Of 4)
    G04412632Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 8: Combination Meter Inner Circuit Diagram (4 Of 4)
    G04412633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Connectors: 

    TERMINAL REFERENCE TABLE

    Terminal No. Wire Harness Side
    C9 1 ECU-B Fuse
    2 GND
    3 Vehicle Speed Sensor *1
    4 GND
    6 Skid Control ECU *2
    7 ECM
    8 Fuel Sender Gauge
    9 ECM
    10 Driver Seat Buckle Switch
    11 Key Unlock Warning Switch
    12 Multiplex Network Body ECU
    16 Generator (Alternator)
    17 ECM
    18 Multiplex Network Body ECU
    19 4P-OUT (Other Parts)
    20 Light Control Rheostat
    21 Gauge Fuse
    23 Tire Pressure Monitor ECU
    24 ECM
    25 Low Oil Pressure Warning Switch
    27 Flasher Relay
    28 Flasher Relay
    32 HEAD Fuse
    33 Center Airbag Sensor Assembly
    35 Skid Control ECU *6
    36 Skid Control ECU *4
    37 Skid Control ECU *4
    38 Skid Control ECU *4
    39 ECM *2
    40 TAIL Fuse
    TERMINAL REFERENCE TABLE

    Terminal No. Wire Harness Side
    C10 1 Park/Neutral Start Switch *2
    2 Park/Neutral Start Switch *2
    3 Park/Neutral Start Switch *2
    4 Park/Neutral Start Switch *2
    5 Park/Neutral Start Switch *2
    6 Park/Neutral Start Switch *2
    7 Park/Neutral Start Switch *2
    8 Park/Neutral Start Switch *2
    9 Skid Control ECU
    10 Skid Control ECU
    11 Brake Fluid Level Warning Switch *3
    12 HEAD Fuse
    13 Skid Control ECU *5
    14 Rear Diff Lock Switch *7
    15 4WD Control ECU
    16 4WD Control ECU
    M/T
    A/T
    w/o VSC
    w/ VSC
    w/ DAC
    w/ AUTO LSD
    w/ Rear Diff Lock
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