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Terminals Of Ecu [11/2021 - ]

  1. COMBINATION METER ASSEMBLY 
    GTY1068829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      D21-1 (EP) - Body ground Ground Always Below 1 Ω
      D21-2 (ES) - Body ground Ground Always Below 1 Ω
      D21-5 (B) - Body ground Power source for auxiliary battery Ignition switch off 11 to 14 V
      D21-6 (IG+) - Body ground Power source for IG relay IG OFF → IG ON Below 1 V → 11 to 14 V
      D21-7 (IL2-) - Body ground Illumination signal Taillights off → on Below 1 V → Pulse generation
      D21-8 (+S) - Body ground Vehicle speed output signal Ignition switch ON, wheel being rotated Pulse generation
      (See waveform 1)
      D21-9 (OILW) - Body ground Engine oil level sensor signal Ignition switch ON, engine oil level not low → low Below 1 V → 11 to 14 V
      D21-12 (HZSW) - Body ground Hazard warning signal switch signal Hazard warning signal switch off → on 11 to 14 V → Below 1 V
      D21-17 (HAZM) - Body ground Hazard warning signal switch signal Turn indicator light (LH) blinking
      (Turn signal switch (LH side) on)      		 11 to 14 V ←→ Below 1 V
      Turn indicator light (LH) blinking
      (Hazard warning signal switch on)      		 Below 1 V
      D21-23 (ILL-) - Body ground Illumination signal Taillights off → on Below 1 V → Pulse generation
      D21-25 (SI) - Body ground Vehicle speed input signal Ignition switch ON, wheel being rotated Pulse generation
      (See waveform 1)
      D21-28 (LST1) - Body ground Fuel lid status signal Ignition switch OFF 11 to 14 V
      The following message (interrupt display) being displayed on the multi-information display:
      1. "Ready to Refuel"
      		 Pulse generation
      (See waveform 4)
      The following message (interrupt display) being displayed on the multi-information display:
      1. "Close Fuel Lid"
      		 Pulse generation
      (See waveform 5)
      D21-32 (CXPI) - Body ground CXPI communication signal - -
      D22-2 (B) - Body ground Power source for auxiliary battery Ignition switch off 11 to 14 V
      D22-5 (LL) - Body ground Front/side turn signal flasher signal
      (LH side)      		 Turn indicator light (LH) blinking 11 to 14 V ←→ Below 1 V
      Turn indicator light (LH) off Below 1 V
      D22-6 (LR) - Body ground Front/side turn signal flasher signal
      (RH side)      		 Turn indicator light (RH) blinking 11 to 14 V ←→ Below 1 V
      Turn indicator light (RH) off Below 1 V
      D22-7 (FR) - D22-25 (FE&B) Fuel level signal Ignition switch ON, fuel receiver gauge indicates F → E (fuel level warning light on) Pulse generation
      (See waveform 2)
      D22-12 (MSTI) - Body ground*3 Steering pad switch without touch detection function signal Ignition switch ON, up, down, left and right switches on steering pad switch not pushed 4.8 to 5.2 V
      D22-13 (ODO) - Body ground ODO/TRIP switch signal Ignition switch ON, ODO/TRIP switch not pushed 4.8 to 5.2 V
      D21-14 (CANL) CAN communication signal - -
      D22-15 (TX-)*2 Local bus communication signal - -
      D22-21 (TRNR) - Body ground Rear turn signal flasher signal
      (RH side)      		 Turn indicator light (RH) blinking 11 to 14 V ←→ Below 1 V
      Turn indicator light (RH) off Below 1 V
      D22-22 (TRNL) - Body ground Rear turn signal flasher signal
      (LH side)      		 Turn indicator light (LH) blinking 11 to 14 V ←→ Below 1 V
      Turn indicator light (LH) off Below 1 V
      D22-23 (FV) - Body ground Power source for fuel sender gauge Ignition switch ON Pulse generation
      (See waveform 3)
      D22-25 (FE&B) - Body ground Ground for fuel sender gauge Always Below 1 Ω
      D22-26 (SW3) - Body ground Ground for trip switch Always Below 1 Ω
      D22-28 (TR) - Body ground Light control rheostat switch signal Ignition switch ON, light control rheostat up and down switches not pushed 4.8 to 5.2 V
      D22-29 (MSM+) - Body ground*3 Steering pad switch without touch detection function signal Ignition switch ON, OK and back switches on steering pad switch not pushed 4.8 to 5.2 V
      D22-31 (CANH) CAN communication signal - -
      D22-32 (TX+)*2 Local bus communication signal - -
      D23-1 (ET+)*1 Ethernet communication signal - -
      D23-2 (ET-)*1 Ethernet communication signal - -
      D137-1 (HGV-)*1 GVIF communication signal - -
      D137-2 (HGV+)*1 GVIF communication signal - -
      D137-3 (HGVG) - Body ground*1 Shield ground Always Below 1 Ω
      1. *1: w/ Headup Display
      2. *2: w/o Headup Display
      3. *3: w/o Touch Tracer Operation
      1. WAVEFORM 1:

        Item Condition
        Tester connection
        • D21-8 (+S) - Body ground
        • D21-25 (SI) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Ignition switch ON, wheel being rotated
        GTY986807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

      2. WAVEFORM 2:

        Item Condition
        Tester connection D22-7 (FR) - D22-25 (FE&B)
        Tool setting 2.5 V/DIV., 20 ms./DIV.
        Condition Ignition switch ON, fuel receiver gauge indicates F → E (fuel level warning light on)
        GTY776691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        The magnitude of the voltage (A) changes as shown in the following tables.

        Terminal No. (Symbol) Condition Specified Condition
        D22-7 (FR) - D22-25 (FE&B) Ignition switch ON, fuel receiver gauge indicates F
        (Segments illuminate 8/8)        		 4.1 to 4.6 V
        Ignition switch ON, fuel receiver gauge indicates below 1/2
        (Segments illuminate 4/8)        		 2.2 to 2.7 V
        Ignition switch ON, fuel receiver gauge indicates E
        (fuel level warning light on)        		 0.3 to 1.1 V
      3. GTY801514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 3:

        Item Condition
        Tester connection D22-23 (FV) - Body ground
        Tool setting 2.5 V/DIV., 20 ms./DIV.
        Condition Ignition switch ON
        Specified Condition 4.5 to 5.5 V
      4. GTY704448Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 4:

        Item Condition
        Tester connection D21-28 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition The following message (interrupt display) being displayed on the multi-information display:
        1. "Ready to Refuel"
      5. WAVEFORM 5:

        Item Condition
        Tester connection D21-28 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition The following message (interrupt display) being displayed on the multi-information display:
        1. "Close Fuel Lid"
        GTY734467Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        This waveform is output when the fuel lid opener switch is operated if the fuel lid is open and any of the following conditions are met:

        • The vehicle has been driven for 1 km (0.6 mile) or more at a speed of 50 km/h (31 mph) or more.
        • 30 minutes or more have elapsed since the fuel lid opener switch was operated.
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