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Terminals Of Ecu

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Terminals Of ECU
    G05196061Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    SIGNAL EARTH (C9-1) - Body ground BR - Body ground Ground Always Below 1 Ω
    POWER EARTH (C9-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
    O/D OFF (C9-3) - Body ground LG - Body ground O/D OFF signal O/D OFF indicator light OFF 10 to 14 V
    O/D OFF indicator light ON Below 1 V
    IG1+ (C9-4) - Body ground R-W - Body ground Ignition switch signal (ON) Ignition switch OFF Below 1 V
    Ignition switch ON 10 to 14 V
    +B (C9-5) - Body ground L-W - Body ground Battery Always 10 to 14 V
    P-BELT OUT (C9-6) - Body ground L - Body ground Seat belt condition signal (Passenger side) Passenger seat belt indicator light is OFF 10 to 14 V
    Passenger seat belt indicator light is Blinks Below 1 V
    FUEL (C9-7) - Body ground Y - Body ground Fuel level signal Ignition switch ON, fuel level is FULL Below 1 V
    Ignition switch ON, fuel level is EMPTY 4 to 7 V
    TEMP (C9-8) - Body ground Y-R - Body ground Coolant temperature signal Ignition switch ON, coolant temperature is 90°C (194°F) Pulse generation (See WAVEFORM 4 )
    SI (C9-9) - Body ground W-G - Body ground Speed signal (Input) Ignition switch ON and turn the wheel slowly Pulse generation (See WAVEFORM 1 )
    4P OUT (C9-10) - Body ground V-W - Body ground Speed signal (Output) Ignition switch ON and turn the wheel slowly Pulse generation (See WAVEFORM 1 )
    P-BELT SW (C9-11) - Body ground L-W - Body ground Seat belt condition signal P-BELT indicator light ON 10 to 14 V
    P-BELT indicator light OFF Below 1 V
    D-BELT SW (C9-12) - Body ground G-Y - Body ground Seat belt condition signal (Driver Side) Driver seat belt indicator light is Blinks Below 1 V
    Driver seat belt indicator light is OFF 10 to 14 V
    BEAM- (C9-13)- Body ground W-B - Body ground Hi-Beam signal Hi-Beam ON 10 to 14 V
    Hi-Beam OFF Below 1 V
    BEAM+ (C9-14) - Body ground R - Body ground Hi-Beam signal Hi-Beam OFF Below 1 V
    Hi-Beam ON 10 to 14 V
    ST (C9-15) ((1)) - Body ground B - Body ground Starting signal Ignition switch OFF Below 1 V
    Ignition switch ON 7 to 14 V
    KEY SW (C9-16) ((2)) - Body ground L-B - Body ground KEY switch signal Ignition key is inserted Below 1 V
    Ignition key is not inserted 10 to 14 V
    D DOOR (C9-17) - Body ground R-W - Body ground D door condition signal Driver door OPEN Below 1 V
    Driver door CLOSE 10 to 14 V
    ILL+ (C9-18) - Body ground G - Body ground Tail light signal Light control switch OFF Below 1 V
    Light control switch ON 10 to 14 V
    TACHO (C9-19) - Body ground B - Body ground Tachometer signal Engine running Pulse generation (See WAVEFORM 2 )
    EXCEPT D DOOR (C9-20) - Body ground R - Body ground Door condition signal (Except for D door) Except driver door OPEN Below 1 V
    Except driver door CLOSE 10 to 14 V
    OIL PRESSURE (C9-21) - Body ground W - Body ground Oil pressure signal OIL/P warning light ON Below 1 V
    OIL/P warning light OFF 10 to 14 V
    FUEL EARTH (C9-22) - Body ground BR - Body ground Ground (Fuel sender gauge) Always Below 1 Ω
    CRUISE (C9-23) - Body ground G-R - Body ground CRUISE signal Ignition switch ON and cruise indicator light ON Below 1 V
    Ignition switch ON and cruise indicator light OFF 10 to 14 V
    TURN L (C9-24) - Body ground G-B - Body ground Turn signal L Ignition switch ON, turn signal LH indicator light OFF Below 1 V
    Ignition switch ON, turn signal LH indicator light ON 10 to 14 V
    TURN R (C9-25) - Body ground G-Y - Body ground Turn signal R Ignition switch ON, turn signal RH indicator light OFF Below 1 V
    Ignition switch ON, turn signal RH indicator light ON 10 to 14 V
    OUTSIDE TEMP+ (C9-26) - OUTSIDE TEMP- (C9-30) B - B-L Outside temp signal Outside temperature at 25°C (77°F) Approx. 2,784 Ω
    ILL- (C9-28) - Body ground W-R - Body ground Rheostat signal (Light control) Light control dimmer switch is TAIL/HEAD Pulse generation (See WAVEFORM 3 )
    TPMS (C9-29) - Body ground LG - Body ground TPMS signal TPMS indicator light ON 6.7 to 12 V
    TPMS indicator light OFF Below 1 V
    CHG- (C9-31) - Body ground Y - Body ground Charge signal Ignition switch OFF 10 to 14 V
    Ignition switch ON Below 1 V
    CHG+ (C9-32) - Body ground B-O - Body ground Charge signal Engine running Below 1 V
    Engine stopped 10 to 14 V
    CHECK ENGINE (C9-33) - Body ground R-Y - Body ground CHECK ENGINE signal CHECK ENGINE warning light ON Below 2 V
    CHECK ENGINE warning light OFF 8 to 14 V
    WASHER LEVEL (C9-34) ((3)) - Body ground L-W - Body ground Washer level signal WASH LVL indicator light OFF 10 to 14 V
    WASH LVL indicator light ON Below 1 V
    BRAKE LEVEL SW (C9-35) - Body ground R-W - Body ground Brake fluid level signal Brake fluid level warning light OFF Below 1 V
    Brake fluid level warning light ON 8 to 14 V
    EBD (C9-36) - Body ground R - Body ground ABS or VSC signal Brake warning light ON 5 to 9 V
    Brake warning light OFF Below 1 V
    ABS (C9-37) - Body ground W-R - Body ground ABS signal ABS warning light ON 5 to 9 V
    ABS warning light OFF Below 1 V
    TEMP DATA OUT (C9-38) - Body ground R - Body ground Outside temp signal Ignition switch ON Pulse generation (See WAVEFORM 5 )
    AIR BAG (C9-39) - Body ground B-Y - Body ground AIR BAG signal AIR BAG warning light OFF 8 to 14 V
    AIR BAG warning light ON Below 1 V
    SLIP (C16-2) - Body ground W - Body ground SLIP signal SLIP indicator light ON Below 1 V
    SLIP indicator light OFF 10 to 14 V
    VSC (C16-3) - Body ground V - Body ground VSC signal VSC indicator light ON Below 1 V
    VSC indicator light OFF 10 to 14 V
    HEAD (C16-7) ((4)) - Body ground R - Body ground Headlight signal Light control switch is OFF 10 to 14 V
    Light control switch is HEAD Below 1 V
    TAIL CANCEL (C16-9)-Body ground B - Body ground Tail cancel signal (Light control) Tail cancel switch OFF Below 1 V
    Tail cancel switch ON 10 to 14 V
    (1) Optiron Meter
    (2) without Door Lock Control
    (3) for Canada
    (4) U.S.A.
    1. Waveform 1 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5V/DIV., 100ms/DIV.
      Vehicle condition Ignition switch ON
      Fig 2: Identifying Waveform 1
      G05196062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2 (Reference):
      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 3: Identifying Waveform 2
      G04966509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Waveform 3 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5 V/DIV., 10 ms/DIV.
      Vehicle condition Engine idle speed
      Fig 4: Identifying Waveform 3
      G05196064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Waveform 4 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 2 V/DIV., 1 ms/DIV.
      Vehicle condition Ignition switch ON

      HINT:

      Duty ratio changes as illumination becomes darker ("A" becomes longer).

      Fig 5: Identifying Waveform 4
      G05196065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Waveform 5 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 2 V/DIV., 1 ms/DIV.
      Vehicle condition Ignition switch ON
    Fig 6: Identifying Waveform 5
    G05196066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. COMBINATION METER INNER CIRCUIT 
Fig 7: Combination Meter Inner Circuit Diagram (1 Of 2)
G05196067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 8: Combination Meter Inner Circuit Diagram (2 Of 2)
G05196068Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINAL SPECIFICATIONS

Terminal No. Wire harness side
C9 1 Ground (Signal Ground)
2 Ground (Power Ground)
3 O/D Off Switch
4 GAUGE Fuse
5 DOME Fuse
6 Front Passenger Seat Belt Warning Light
7 Fuel Sender Gauge Assembly
8 ECM
9 Brake Actuator Assembly (with ABS), ABS & Traction Actuator Assembly (with VSC)
10 Radio and Player (with Navigation), ECM, ECM Integration Relay
11 Occupant Detection Sensor
12 Front Seat Inner Belt Assembly (Driver Side)
13 Ground
14 Headlight Dimmer Relay
15 Clutch Start Switch (M/T), Park/Neutral Position Switch (A/T)
16 Unlock Warning Switch Assembly
17 Door Courtesy Light Switch Assembly (Driver Side)
18 Tail Relay (*1), Light Control Switch (*2)
19 ECM
20 Door Courtesy Light Switch Assembly (Except Driver Side)
21 Engine Oil Pressure Switch
22 Fuel Sender Gauge Assembly
23 ECM
24 Turn Signal Flasher (L)
25 Turn Signal Flasher (R)
26 Ambient Temperature Sensor
27 -
28 Light Control Rheostat
29 Brake Actuator Assembly (with ABS), ABS & Traction Actuator Assembly (with VSC)
30 Ambient Temperature Sensor
31 Generator
32 AM2 Fuse
33 ECM
34 Washer Level Sensor
35 Brake Fluid Level Warning Switch, Parking Brake Switch (without ABS)
36 Brake Actuator Assembly (with ABS), ABS & Traction Actuator Assembly (with VSC)
37 Brake Actuator Assembly (with ABS), ABS & Traction Actuator Assembly (with VSC)
38 Brake Actuator Assembly (with ABS), ABS & Traction Actuator Assembly (with VSC)
39 Center Airbag Sensor Assembly
40 -
C16 1 -
2 ABS & Traction Actuator Assembly (with VSC)
3 ABS & Traction Actuator Assembly (with VSC)
4 -
5 -
6 -
7 DRL Relay
8 -
9 Light Control Rheostat
10 -
11 -
12 -
13 -
14 -
15 -
16 -
*1: U.S.A.
*2: Canada
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