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Terminals Of Ecu

  1. COMBINATION METER ASSY 
    Fig 1: Identifying Combination Meter Assembly Terminals
    G02975595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    AIRBAG (E3-1) - Body ground LG - Body ground Airbag signal Ignition switch on, 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
    PBKL (E3-13) - 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 waveform 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 (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) - Body ground P - Body ground Communication circuit - -
    PANEL DIM (E2-8) ((1)) - Body ground Y - Body ground Panel dimmer signal Ignition switch on (IG), light control rheostat position MID Pulse generation (See wave form 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 wave form 3)
    S-GND (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 wave form 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 waveform 5)
    4P (E2-15) - Body ground SB - Body ground Speed signal (Output) Ignition switch on (IG), turn the wheel slowly Pulse generation (See waveform 1)
    MPX+ (E2-16) - Body ground LG - Body ground Communication circuit - -
    SECURITY (E2-18) ((2)) - 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) w/o Navigation System
    (2) w/Theft Deterrent System

    Wave form 1 (Reference): Using an oscilloscope:

    WAVE FORM 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 wave form narrows.

    Fig 2: Oscilloscope Waveform 1 Signal Graph
    G02975621Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Wave form 2 (Reference): Using an oscilloscope:

    WAVE FORM 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 Waveform 2 Signal Graph
    G02975597Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Wave form 3 (Reference): Using an oscilloscope:

    WAVE FORM 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 Waveform 3 Signal Graph
    G02975621Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Wave form 4 (Reference): Using an oscilloscope:

    WAVE FORM 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 Waveform 4 Signal Graph
    G02975599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Wave form 5 (Reference): Using an oscilloscope:

    WAVE FORM REFERENCE

    Item Condition
    Tool setting 5 V/DIV., 10 ms/DIV.
    Vehicle condition Engine idle speed
    Fig 6: Oscilloscope Waveform 5 Signal Graph
    G02975600Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ACCESSORY METER ASSY 
    Fig 7: Identifying Accessory Meter Assembly Terminals
    G02975601Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color 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 14 V
    TAIL (TR) (E7-5) - Body ground Y - Body ground Illumination signal Ignition switch on (IG), light control rheostat position MID Pulse generation (See wave form 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
    ECU-B (E7-9) - Body ground R - Body ground Battery Always 10 to 14 V
    TX1+ (E7-11) ((1)) - Body ground Y - Body ground Communication line - -
    TX+ (E7-12) ((1)) - Body ground BR - Body ground Communication line - -
    TX1- (E7-13) ((1)) - Body ground B - Body ground Communication line - Below 1 V
    TX- (E7-14) ((1)) - Body ground R - Body ground Communication line - -
    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) Always 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 wave form 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 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 Communication line - -
    TX+ (E5-6) ((2)) - Body ground V - Body ground Communication line - -
    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) w/o Navigation System
    (2) w/Navigation System

    Wave form 1 (Reference): Using an oscilloscope:

    WAVE FORM REFERENCE

    Item Condition
    Tool setting 2 V/DIV., 2 MS/DIV.
    Vehicle condition Ignition switch ON (IG), light control rheostat position MID
    Fig 8: Oscilloscope Waveform 1 Signal Graph
    G02975602Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Wave form 2 (Reference): Using an oscilloscope:

    WAVE FORM REFERENCE

    Item Condition
    Tool setting 5 V/DIV., 200 MS/DIV.
    Vehicle condition Ignition switch ON (IG), passenger seat belt indicator light blinks
    Fig 9: Oscilloscope Waveform 2 Signal Graph
    G02975621Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. ECM 
    Fig 10: Identifying ECM Terminals
    G02975604Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION

    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 wave form 1)

    Wave Form 1 (Reference): Using an oscilloscope:

    WAVE FORM REFERENCE

    Item Condition
    Tool setting 10 V/ DIV., 20 ms/ DIV.
    Vehicle condition Engine idle speed
    Fig 11: Oscilloscope Waveform 1 Signal Graph
    G02975605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. COMBINATION METER INNER CIRCUIT 
    Fig 12: Combination Meter Inner Circuit Diagram (1 Of 2)
    G02975606Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 13: Combination Meter Inner Circuit Diagram (2 Of 2)
    G02975607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Connectors: 

    Fig 14: Connector Terminals Description Table
    G02975608Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. ACCESSORY METER INNER CIRCUIT 
    Fig 15: Accessory Meter Inner Circuit Diagram - w/Navigation System
    G02975609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 16: Accessory Meter Inner Circuit Diagram - W/O Navigation System
    G02975610Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Connectors: 

    Fig 17: Connector Terminals Description Table
    G02975611Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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