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Terminals Of Ecu

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Combination Meter Assembly Connector Terminals
    G05006118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION AND SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    AIRBAG (E3-1) - Body ground LG - Body ground Airbag signal Ignition switch on (IG), AIRBAG warning light ON → OFF Below 1 V → 7 to 12 V
    TURN R (E3-3) - Body ground P - Body ground Turn signal R Ignition switch on (IG), turn signal RH indicator light OFF → ON Below 1 V → 10 to 14 V
    TURN L (E3-4) - Body ground B - Body ground Turn signal L Ignition switch on (IG), turn signal LH indicator light OFF → ON Below 1 V → 10 to 14 V
    CHK E/G (E3-9) - Body ground R - Body ground Check engine signal Ignition switch on (IG), CHECK ENGINE warning light ON → OFF Below 2.5 V → 10 to 14 V
    H-LP LEVEL (E3-10) - Body ground G - Body ground Headlight auto level signal Ignition switch on (IG), headlight auto level indicator light ON → OFF Below 1 V → 10 to 14 V
    BRAKE LEVEL SW (E3-11) - Body ground V - Body ground Brake fluid level signal Ignition switch on (IG), brake warning light ON → OFF Below 1 V → 10 to 14 V
    TPMS (E3-12) - Body ground G - Body ground Tire pressure signal Ignition switch on (IG), tire pressure warning light OFF → ON Below 1 V → 10 to 14 V
    PBKL (3-13) - Body ground G - Body ground Seat belt condition signal (Passenger side) Ignition switch on (IG), passenger seat belt indicator light OFF → Blinks 10 to 14 V → Below 1 V
    SI (E3-14) Body ground W - Body ground Speed signal (Input) Ignition switch on (IG), turn the wheel slowly Pulse generation (See  awaveform 1)
    FUEL (E3-15) - Body ground GR - Body ground Fuel level signal Ignition switch on (IG), fuel level FULL → EMPTY Below 1 V → 4 to 7 V
    FE(E3-16) - E2-10 P - Body ground Ground (Fuel ground) Always Below 1 V
    DOME+B (E2-1) Body ground V - Body ground Battery Always 10 to 14 V
    ECU-B (E2-2) Body ground B - Body ground Battery Always 10 to 14 V
    MPX- (E2-4) - SGND (E2-10) P - W-B Multiplex communication signal Ignition switch on (IG) Pulse generation
    PANEL DIM (E2-8) (*) - Body ground Y - Body ground Panel dimmer signal Ignition switch on (IG), light control rheostat position MID Pulse generation
    (See  bwaveform 2)
    P BELT (E2-9) - Body ground B - Body ground Seat belt condition signal (Passenger side) Ignition switch on (IG), passenger seat belt indicator light OFF → Blinks Pulse generation
    (See  cwaveform 3)
    SGND (E2-10) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 V
    ILL-(E2-11) - Body ground R - Body ground Illumination signal Ignition switch on (IG), TAIL ON, and light control rheostat position MID Pulse generation
    (See  dwaveform 4)
    P-GND (E2-12) - Body ground W-B - Body ground Ground (Power ground) Always Below 1 V
    IG2(E2-13) - Body ground R - Body ground Battery Ignition switch off → on (IG) Below 1 V → 10 to 14 V
    TACHO (E2-14) - Body ground O - Body ground Tachometer signal Engine running Pulse generation
    (See  ewaveform 5)
    4P (E2-15) - Body ground SB - Body ground Speed signal (Output) Ignition switch on (IG), turn the wheel slowly Pulse generation
    (See  awaveform 1)
    MPX+(E2-16) - SGND(E2-10) LG - W-B Multiplex communication signal Ignition switch on (IG) Pulse generation
    SECURITY (E2-18) ((1)) - Body ground Y - Body ground Security signal Ignition switch off, SECURITY warning light ON → OFF 10 to 14 V → Below 1 V
    TC SW (E2-19) - Body ground V - Body ground Tail cancel switch signal Tail cancel switch OFF → ON 4 to 6 V → Below 1 V
    RL (E2-20) - Body ground B - Body ground Light control rheostat signal Ignition switch on (IG) 4 to 6 V
    RV (E2-21) - Body ground R - Body ground Light control rheostat signal Ignition switch on (IG), light control rheostat position MIN → MAX Below 1 V → 4 to 6 V
    RE (E2-22) - Body ground W - Body ground Ground (Rheostat ground) Always Below 1 V
    *1: without Navigation System
    (1) with Theft Deterrent System
    1. Waveform 1 (Reference): Using an oscilloscope:
      WAVEFORM REFERENCE

      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 2: Oscilloscope Signal Waveform 1
      G05006119Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2 (Reference): Using an oscilloscope:
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 2 V/DIV, 2 ms/DIV.
      Vehicle condition Ignition switch on (IG), light control rheostat position MID
      Fig 3: Oscilloscope Signal Waveform 2
      G05006120Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Waveform 3 (Reference): Using an oscilloscope:
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5 V/DIV., 200 ms/DIV.
      Vehicle condition Ignition switch on (IG), passenger seat belt indicator light blinks
      Fig 4: Oscilloscope Signal Waveform 3
      G05006121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Waveform 4 (Reference): Using an oscilloscope:
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5 V/DIV., 2 ms/DIV.
      Vehicle condition Ignition switch on (IG), light control rheostat position MID
      Fig 5: Oscilloscope Signal Waveform 4
      G05006122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Waveform 5 (Reference): Using an oscilloscope:
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5V/DIV., 10 ms/DIV.
      Vehicle condition Engine idle speed
    Fig 6: Oscilloscope Signal Waveform 5
    G05006123Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ACCESSORY METER ASSEMBLY 
    Fig 7: Identifying Accessory Meter Assembly Connector Terminals
    G05006124Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION AND SPECIFIED CONDITION

    Symbols Wiring Terminal Description Condition Specified Condition
    ACC (E7-1) - Body ground GR - Body ground Battery Ignition switch off → on (ACC) Below 1 V → 10 to 14 V
    IG2 (E7-2) - Body ground G - Body ground Battery Ignition switch off → on (IG) Below 1 V → 10 to 14V
    TAIL (TR) (E7-5) - Body ground Y - Body ground Illumination signal Ignition switch on (IG), light control rheostat position MID Pulse generation
    (See  awaveform 1)
    RE1 (SW) (E7-7) - Body ground G - Body ground Display switch signal Ignition switch on (IG), display switch is pushed in 4 to 6 V → Below 1 V
    GND1 (E7-8) - Body ground W-B - Body ground Ground (Power ground) Always Below 1 V
    GND1 (E7-9) - Body ground R - Body ground Battery Always 10 to 14 V
    TX1 + (E7-11) ((1)) - Body ground Y - Body ground AVC-LAN communication signal Ignition switch on (ACC) 2 to 3 V
    TX+ (E7-12) ((1)) - Body ground BR - Body ground AVC-LAN communication signal Ignition switch on (ACC) 2 to 3 V
    TX1- (E7-13) ((1)) - Body ground B - Body ground AVC-LAN communication signal Ignition switch on (ACC) 2 to 3 V
    TX - (E7-14) ((1)) - Body ground R - Body ground AVC-LAN communication signal Ignition switch on (ACC) 2 to 3 V
    SG1 (E7-15) - Body ground W - Body ground Display switch signal Always Below 1 V
    SG (E7-16) - Body ground W-B - Body ground Ground (Signal ground) Ground (Signal ground) Below 1 V
    IG2 (E11-1) - Body ground W - Body ground Battery Ignition switch off → on (IG) Below 1 V → 10 to 14 V
    MSW (E11-3) ((1)) - Body ground G - Body ground Display switch signal Ignition switch on (IG), display switch is pushed in 4 to 6 V → Below 1 V
    SG1 (E11-4)((1)) - Body ground W - Body ground Display switch signal Always Below 1 V
    SGND (E11-6) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 V
    ACAN (E11-7) - Body ground V - Body ground Illumination signal Ignition switch on (IG), TAIL OFF → ON Below 1 V → 10 to 14 V
    P-BELT (E11-9) - Body ground B - Body ground Seat belt condition signal (Passenger side) Ignition switch on (IG), sit on the passenger seat and passenger seat belt warning light OFF → blinks Pulse generation
    (See  bwaveform 2)
    P-AIRBAG-OFF (E11-10) - Body ground L - Body ground P-AIRBAG-OFF signal Ignition switch on (IG), P-AIRBAG-OFF indicator light OFF → ON 10 to 14 V → Below 1 V
    P-AIRBAG-ON (E11-11) - Body ground BR - Body ground P-AIRBAG-ON signal Ignition switch on (IG), P-AIRBAG-ON indicator light OFF → ON 10 to 14 V → Below 1 V
    B(+)(E4-1)((1)) - Body ground W - Body ground Battery Always 10 to 14 V
    EARTH (E4-2) ((1)) - Body ground W-B - Body ground Ground Always Below 1 V
    ILL (+) (E4-3) ((1)) - Body ground G - Body ground Illumination signal Ignition switch on (IG), light control switch OFF → ON Below 1 V → 10 to 14 V
    ACC (+) (E4-4)((1)) - Body ground B - Body ground Battery Ignition switch off → on (IG) Below 1 V → 10 to 14 V
    ACC (+) (E5-4) ((2)) - Body ground) (E B - Body ground Battery Ignition switch off → on (IG) Below 1 V → 10 to 14 V
    TX- (E5-5) ((2)) - Body ground LG - Body ground AVC-LAN communication signal Ignition switch on (ACC) 2 to 3 V
    TX+ (E5-6) ((2)) - Body ground V - Body ground AVC-LAN communication signal Ignition switch on (ACC) 2 to 3 V
    EARTH (E5-7) ((2)) - Body ground W-B - Body ground Ground Always Below 1 V
    B (+) (E5-8) ((2)) - Body ground W - Body ground Battery Always 10 to 14 V
    (1) without Navigation System
    (2) with Navigation System
    1. Waveform 1 (Reference): Using an oscilloscope:
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 2 V/DIV, 2 ms/DIV.
      Vehicle condition Ignition switch on (IG), light control rheostat position MID
    2. Waveform 2 (Reference): Using an oscilloscope:
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5 V/DIV, 200 ms/DIV.
      Vehicle condition Ignition switch on (IG), passenger seat belt indicator light blinks
      Fig 8: Oscilloscope Signal Waveform 1
      G05006120Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 9: Oscilloscope Signal Waveform 2
      G05006121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. ECM 
    Fig 10: Identifying ECU Connector Terminals
    G05006127Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION AND SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    TACH (D41-1) - Body ground W - Body ground Tachometer signal Ignition switch off → on (IG), Engine idle speed Pulse generation
    (See  awaveform 1)
    1. Waveform 1 (Reference): Using an oscilloscope:
    WAVEFORM REFERENCE

    Item Condition
    Tool setting 10 V/DIV, 20 V/DIV.
    Vehicle condition Engine idle speed
    Fig 11: Oscilloscope Signal Waveform 1
    G05006128Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. COMBINATION METER INNER CIRCUIT 
    Fig 12: Combination Meter Inner Circuit Diagram (1 Of 2)
    G05006129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 13: Combination Meter Inner Circuit Diagram (2 Of 2)
    G05006130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Connectors: 

    CONNECTORS TERMINALS DESCRIPTION

    Terminal No. Wire Harness Side
    E3 1 Center Airbag Sensor Assembly (AIRBAG)
    2 -
    3 Turn Signal Flasher (TURN R)
    4 Turn Signal Flasher (TURN L)
    5 -
    6 -
    7 -
    8 -
    9 ECM (CHECK E/G)
    10 Headlight Beam Level Control ECU (H-LP LEVEL)
    11 Brake Fluid Level Warning Switch (BRAKE L. SW)
    12 Tire Pressure Warning ECU (TPMS)
    13 Center Airbag Sensor Assembly (PBKL)
    14 Skid Control ECU (SI)
    15 Fuel Sender Gauge Assembly (FUEL)
    16 Fuel Sender Gauge Assembly (FUEL GROUND)
    E2 1 DOME Fuse (DOME+B)
    2 ECU-B Fuse (ECU-B)
    3 -
    4 Multiplex Communication Line (MPX-)
    5 -
    6 -
    7 -
    8 Multi-Display (PANEL DIM) ((1))
    9 Multi-Display (P BELT)
    10 Ground (SGND)
    11 Illumination Parts (ILL-)
    12 Ground (PGND)
    13 IG2 Fuse (IG2)
    14 ECM (TACHO)
    15 Each Part That Uses Speed Signal (4P) (ECM, Power Source Control ECU ((2)), Multi-Display, Tire Pressure Warning ECU)
    16 Multiplex Communication Line (MPX+)
    17 -
    18 ID Code Box (SECURITY) ((3)), Transponder Key ECU (SECURITY) ((3)) / Security ECU (SECURITY) ((2))
    19 Light Control Rheostat (TC)
    20 Light Control Rheostat (T)
    21 Light Control Rheostat (RV)
    22 Ground (RE)
    23 -
    24 -
    (1) without Navigation System
    (2) without Smart Key System
    (3) with Smart Key System
  5. ACCESSORY METER INNER CIRCUIT 
    Fig 14: Accessory Meter Inner Circuit Diagram (1 Of 2)
    G05006131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 15: Accessory Meter Inner Circuit Diagram (2 Of 2)
    G05006132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINALS REFERENCE

    Terminal No. Wire harness side
    E7 1 ECU-ACC Fuse (ACC)
    2 IG2 Fuse (IG2)
    3 -
    4 -
    5 Combination Meter Assembly (TAIL (TR))
    6 -
    7 Display Switch (RE1 (SW)) ((1))
    8 Ground (GND1)
    9 ECU-B Fuse (ECU-B)
    10 -
    11 Audio Controller (TX1+)
    12 Gateway ECU (TX+)
    13 Audio Controller (TX1-)
    14 Gateway ECU (TX-)
    15 Display Switch (SG1)((1))
    16 Ground (SG)
    E11 1 DOME Fuse (IG2)
    2 -
    3 Display Switch (MSW)((1))
    4 Display Switch (SG1)((1))
    5 -
    6 Ground (SGND)
    7 Body ECU (ACAN)
    8 -
    9 Combination Meter Assembly (P-BELT)
    10 Center Airbag Sensor Assembly (P-AIRBAG-OFF)
    11 Center Airbag Sensor Assembly (P-AIRBAG-ON)
    12 -
    E4((1)) 1 DOME Fuse (B(+))
    2 Ground (EARTH)
    3 Body ECU (ILL (+))
    4 ECU-ACC Fuse (ACC (+))
    E5((2)) 1 -
    2 -
    3 -
    4 ECU-ACC Fuse (ACC (+))
    5 Multi-Display (TX-)
    6 Multi-Display (TX+)
    7 Ground (EARTH)
    8 IG2 Fuse (B (+))
    (1) without Navigation System
    (2) with Navigation System
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