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HOMESERVICE MANUALSTOYOTA2009SIENNA XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALGAUGESMETERMETER / GAUGE SYSTEMTERMINALS OF ECU
2009 Toyota Sienna XLE, FWD

Terminals Of Ecu

2009 Toyota Sienna XLE, FWDSECTION Terminals Of Ecu
  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying ECM Combination Meter Connector Terminal
    G05140966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECM COMBINATION METER CONNECTOR TERMINAL CHART

    Terminals No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    C10-3(FLDS)((1))-Body ground R-W - Body ground 3RD SEAT indicator light signal (Folding seat indicator light signal) Turn the ignition switch to the ON position, 3RD SEAT indicator light ON Below 3 V
    Turn the ignition switch to the ON position, 3RD SEAT indicator light OFF 10 to 14 V
    C10-4 (LP) ((2)) - Body ground B - Body ground SECURITY indicator light signal SECURITY indicator light ON 8 to 14 V
    SECURITY indicator light OFF Below 1 V
    C10-5(WLVL)-Body ground L-R - Body ground WASHER indicator light signal Turn the ignition switch to the ON position, WASHER indicator light OFF 10 to 14 V
    Turn the ignition switch to the ON position, WASHER indicator light ON Below 1 V
    C10-6 (TIRE) -Body ground GR-L - Body ground TIRE PRESSURE warning light signal Turn the ignition switch to the ON position, TIRE PRESSURE warning light ON 0.9 to 3.2 V
    Turn the ignition switch to the ON position, TIRE PRESSURE warning light OFF 3.2 V or higher
    C10-7 (ESC)-Body ground R-W - Body ground ABS warning light signal Turn the ignition switch to the ON position, ABS warning light ON 10 to 14 V
    Turn the ignition switch to the ON position, ABS warning light OFF Below 1 V
    C10-8 (EFI) - Body ground B-Y - Body ground Malfunction Indicator Lamp signal (Check engine warning light signal) Turn the ignition switch to the ON position, MIL ON Below 1 V
    Turn the ignition switch to the ON position, MIL OFF 10 to 14 V
    C10-10(FUS-)-Body ground BR-B - Body ground Ground (Fuel ground) Always Below 1 V
    C10-12(+B)-Body ground W-L - Body ground Battery Always 10 to 14 V
    C10-13(LVSR)-Body ground Y-R - Body ground Brake fluid level warning switch signal Turn the ignition switch to the ON position, BRAKE warning light OFF 10 to 14 V
    Turn the ignition switch to the ON position, BRAKE warning light ON Below 1 V
    C10-14(SW)-Body ground Y-B - Body ground BRAKE warning light signal Turn the ignition switch to the ON position, BRAKE warning light ON 10 to 14 V
    Turn the ignition switch to the ON position, BRAKE warning light OFF Below 1 V
    C10-16 (B) - Body ground G-Y - Body ground TURN R indicator light signal Turn the ignition switch to the ON position, TURN R indicator light OFF Below 1 V
    Turn the ignition switch to the ON position, TURN R indicator light ON 10 to 14 V
    C10-18(CHG-)-Body ground W-G - Body ground CHARGE warning light signal Turn the ignition switch to the ON position, CHARGE warning light OFF Below 1 V
    Turn the ignition switch to the ON position, CHARGE warning light ON 10 to 14 V
    C10-19 (S) - Body ground Y-B - Body ground OIL PRESSURE warning light signal Turn the ignition switch to the ON position, OIL PRESSURE warning light OFF Below 1 V
    Turn the ignition switch to the ON position, OIL PRESSURE warning light ON 10 to 14 V
    C10-21 (B) - Body ground G-B - Body ground TURN L indicator light signal Turn the ignition switch to the ON position, TURN L indicator light OFF Below 1 V
    Turn the ignition switch to the ON position, TURN L indicator light ON 10 to 14 V
    C10-22 (ILL-) -Body ground W-G - Body ground Illumination signal Turn the ignition switch to the ON position, light control switch OFF Below 1 V
    Turn the ignition switch to the ON position, light control switch ON 10 to 14 V
    C10-23 (ILL-)-Body ground W-R - Body ground Illumination signal Turn the ignition switch to the ON position, light control switch OFF Below 1 V
    Turn the ignition switch to the ON position, light control switch ON 10 to 14 V
    C10-25(ILG1)-Body ground W-B - Body ground Ground (Illumination ground) Always Below 1 V
    C10-26(ILG2)-Body ground W-B - Body ground Ground (Illumination ground) Always Below 1 V
    C10-28(MPX-)-Body ground V - Body ground Multiplex Communication Line Always 10 to 14 V
    C10-29(MPX+)-Body ground R-L - Body ground Multiplex Communication Line Always 10 to 14 V
    C10-30(ES)-Body ground BR - Body ground Ground (Signal ground) Always Below 1 V
    C10-32(IG+)-Body ground B-R - Body ground Ignition switch signal Turn the ignition switch off Below 1 V
    Turn the ignition switch to the ON position 10 to 14 V
    C10-33(E/M)-Body ground W - Body ground Accessory meter signal Communication Line -
    C10-34 (TX) - Body ground R - Body ground Accessory meter signal Communication Line -
    C10-35 (SI) - Body ground GR - Body ground Speed signal (Input) Turn the wheel slowly Pulse generation (See  a waveform 1)
    C10-36 (+S) - Body ground V-W - Body ground Speed signal (Output) Turn the ignition switch off Below 1 V
    Turn the ignition switch to the ON position 10 to 14 V
    C10-37 (S) - Body ground B-O - Body ground Tachometer signal Engine idle speed Pulse generation (See  b waveform 2)
    C10-38(FUS+)-Body ground Y-G - Body ground Fuel signal Turn the ignition switch to the ON position, fuel level is FULL Below 2 V
    Turn the ignition switch to the ON position, fuel level is EMPTY 5 to 8V
    (1) with Power Rear No. 2 Seat with Stowing Function
    (2) with Theft Deterrent System
    1. Waveform 1 (Reference): Using an oscilloscope:

      OK: 

      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: Identifying Waveform 1
      G04966509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2 (Reference): Using an oscilloscope:

      OK: 

      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5V/DIV, 10ms./DIV.
      Vehicle condition Engine idle speed
      3. Fig 3: Identifying Waveform 2
      G05196064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ACCESSORY METER ASSEMBLY 
    Fig 4: Identifying Accessory Meter Assembly Connector Terminals
    G05140969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ACCESSORY METER ASSEMBLY CONNECTOR TERMINALS REFERENCE

    Terminals No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    A29-1 (BAT) - Body ground R - Body ground Battery Always 10 to 14 V
    A29-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
    A29-5 (IGN) - Body ground B-R - Body ground Ignition switch signal Turn the ignition switch off Below 1 V
    Turn the ignition switch to the ON position 10 to 14 V
    A29-7 (ILL-) - Body ground W-R - Body ground Illumination signal Turn the ignition switch to the ON position, light control switch OFF Below 1 V
    Turn the ignition switch to the ON position, light control switch ON 10 to 14 V
  3. COMBINATION METER INNER CIRCUIT 
    Fig 5: Combination Meter Inner - Circuit Diagram (1 Of 3)
    G05140970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.