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Terminals Of Ecu: Notes

  1. CHECK COMBINATION METER ASSY 
      Fig 1: Identifying Terminals Of ECU
      G03196840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C10 and C11 meter connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard: 

      TERMINAL WIRING SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IGN1 (C10-1) - Body ground R-B - Body ground Ignition switch signal Ignition switch OFF -> ON Below 1 V -> 10 to 14 V
      S GND (C10-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
      +B (C10-7) - Body ground L-B - Body ground Battery Always 10 to 14 V
      IGN2 (C11-13) - Body ground B-R -Body ground Ignition switch signal Ignition switch OFF -> ON Below 1 V -> 10 to 14 V

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

    3. Reconnect the C10 and C11 meter connectors.
    4. Measure the resistance of the connectors.

      Standard: 

      TERMINAL WIRING SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BEAM- (C10-2) - Body ground R-Y -Body ground Hi-beam indicator signal Headlamp dimmer switch (Hi-beam) Lo -> Hi Below 1 V -> 10 to 14V
      TURN R (C10-4) - Body ground G-Y -Body ground Turn signal RH indicator signal Ignition switch ON, turn signal RH indicator OFF -> ON Below 1 V -> 10 to 14V
      TURN L (C10-5) -Body ground P-B - Body ground Turn signal LH indicator signal Ignition switch ON, turn signal LH indicator OFF -> ON Below 1 V -> 10 to 14V
      P-BELTOUT(C10-6) - Body ground G-W -Body ground Seat belt warning lamp signal (Passenger's seat) Seat belt warning lamp for passenger's seat OFF -> Blinks Below 1 V -> 10 to 14V
      BEAM+ (C10-8) - Body ground R-L -Body ground Hi-beam indicator signal Headlamp dimmer switch (Hi-beam) Lo -> Hi Below 1 V -> 10 to 14V
      KEY ILL OUT (C10-9)-Body ground BR-Y -Body ground Key illumination signal Key illumination ON -> OFF Below 1 V -> 10 to 14V
      SP (C10-10) - Body ground W-R -Body ground Vehicle speed signal (Input) Ignition switch ON, slowly turn wheel Pulse generation (See WAVEFORM 1  )
      TM (C10-11)- Body ground B - Body ground Tachometer signal (Input) Engine idling Pulse generation (See WAVEFORM 2  )
      ILL+ (C10-12) - Body ground G - Body ground Illumination signal Taillamp OFF -> ON Below 1 V -> 10 to 14V
      2 (C11-1) - Body ground(1) G - Body ground A/T shift indicator signal (2) A/T 2 indicator OFF -> ON Below 1 V -> 10 to 14V
      D (C11-2) - Body ground(1) LG-B -Body ground A/T shift indicator signal (D) A/T D indicator OFF -> ON Below 1 V -> 10 to 14V
      N(C11-3) - Body ground(1) GR-Body ground A/T shift indicator signal (N) A/T N indicator OFF -> ON Below 1 V -> 10 to 14V
      R (C11-4) - Body ground(1) R-W -Body ground A/T shift indicator signal (R) A/T R indicator OFF -> ON Below 1 V -> 10 to 14V
      P (C11-5) - Body ground(1) R - Body ground A/T shift indicator signal (P) A/T P indicator OFF -> ON Below 1 V -> 10 to 14V
      D-BELT(C11-6) - Body ground W-R -Body ground Seat belt warning lamp for driver's seat signal Ignition switch ON, seat belt unfastened -> fastened Below 1 V -> 10 to 14V
      ILL- (C11-7) - Body ground W-R -Body ground Illumination signal Lamp control switch TAIL, light control rheostat position MIN -> MAX Below 1 V -> 10 to 4V
      P-BELT (C11-8) -Body ground O - Body ground Seat belt warning lamp for passenger's seat signal Ignition switch ON, sit on passenger seat, seat belt unfastened -> fastened Below 1 V -> 10 to 14V
      VSC (C11 -10)(2) - Body ground BR-W -Body ground VSC warning lamp signal Ignition switch ON, VSC warning lamp ON -> OFF Below 1 V -> 10 to 14V
      ABS(C11-1 1) - Body ground P - Body ground ABS signal Ignition switch ON, ABS warning lamp ON -> OFF 6.7 to 12V -> Below 1 V
      O-DOFF (C11-12) - Body ground G-O - Body ground O/D OFF signal O/D OFF indicator lamp ON -> OFF Below 1 V -> 10 to 14V
      BRAKE (C11-14) - Body ground B-Y -Body ground Brake signal Ignition switch ON, BRAKE warning lamp ON -> OFF 6.7 to 12V -> Below 1 V
      BRAKE LEVEL (C11-15) - Body ground Y-R - Body ground Brake fluid level warning lamp signal Ignition switch ON, brake fluid level warning lamp ON -> OFF Below 1 V -> 10 to 14V
      OIL-P (C11-16) - Body ground G-Y -Body ground Oil pressure signal Oil pressure warning lamp ON -> OFF Below 1 V -> 10 to 14V
      L (C11-17) - Body ground(1) G-R - Body ground A/T shift indicator signal (L) A/T L indicator OFF -> ON Below 1 V -> 10 to 14 V
      KEY SW (C11-18) - Body ground Y - Body ground Unlock warning switch signal Key is inserted -> removed Below 1 V -> 10 to 14 V
      FUEL (C11-19) - Body ground V - Body ground Fuel level signal Ignition switch ON, fuel level is FULL -> EMPTY Below 1 V -> 4 to 7V
      AIRBAG (C11-20) - Body ground B-Y - Body ground SRS warning lamp signal Ignition switch ON, SRS warning lamp ON -> OFF 8 to 14 V -> Below 1 V
      4P-OUT (C11-21) - Body ground V-W -Body ground Speed signal (Output) Ignition switch ON and turn wheel slowly Pulse generation (See WAVEFORM 1  )
      HOT (C11-23) - Body ground Y-R -Body ground Coolant temperature signal Ignition switch ON, HOT indicator OFF -> ON Below 1 V -> 2 to 5 V
      COLD (C11-24) - Body ground Y - Body ground Coolant temperature signal Ignition switch ON, COLD indicator OFF -> ON Below 1 V -> 2 to 5 V
      D-DOOR (C11-25) -Body ground R-Y - Body ground Driver door condition signal Driver door OPEN -> CLOSE Below 1 V -> 10 to 14 V
      DOOR (C11-26) - Body ground L - Body ground Except driver door condition signal Except driver door OPEN -> CLOSE Below 1 V -> 10 to 14 V
      SLIP (C11-27)(2) - Body ground B-R - Body ground SLIP indicator signal Ignition switch ON, SLIP indicator ON -> OFF Below 1 V -> 10 to 14 V
      TRAC OFF (C11-30)(2) - Body ground R-L - Body ground TRAC OFF indicator signal Ignition switch ON, TRAC OFF indicator ON -> OFF Below 1 V -> 10 to 14 V
      CHECK ENGINE (C11-31) - Body ground Y-R - Body ground MIL signal Ignition switch ON, MIL ON -> OFF Below 1 V -> 10 to 14 V
      CHG- (C11-32) - Body ground B-W - Body ground Charge warning lamp signal Ignition switch ON, charge warning lamp OFF -> ON 10 to 14 V -> Below 1 V
      (1) A/T
      (2) w/ VSC

      HINT:

      If the result is not as specified, the combination meter may be malfunctioning.

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