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Home >> Lexus >> 2023 >> ES 300h Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System (Hybrid) - Diagnostics - Introduction (2 Of 2) >> METER / GAUGE SYSTEM (for HV Model) >> Terminals Of Ecu [06/2018 - 08/2020] >> Terminals Of Ecu [06/2018 - 08/2020]

Terminals Of Ecu [06/2018 - 08/2020]

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Combination Meter Assembly Connector End View
    GTY778203Courtesy 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) Wiring Color Terminal Description Signal Input/Output Condition Specified Condition
      G17-2 (MSM+) - Body ground GR - Body ground Steering pad switch assembly signal Input Power switch on (IG), OK and back switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      G17-3 (MSTI) - Body ground R - Body ground Steering pad switch assembly signal Input Power switch on (IG), up, down, right and left switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      G17-4 (ODO) - Body ground LA-L - Body ground ODO/TRIP switch signal Input Power switch on (IG), ODO/TRIP switch (trip switch) not pushed 4.8 to 5.2 V
      G17-7 (TX-) W Local bus communication line Input/Output - -
      G17-8 (TX+) G Local bus communication line Input/Output - -
      G17-11 (LST1) - Body ground L - Body ground Fuel lid operation signal Input "Refuel Ready" displayed on multi-information display Pulse generation (See waveform 4)
      "Close Fuel Lid" displayed on multi-information display Pulse generation (See waveform 5)
      "Please Wait Now Opening" displayed on multi-information display Pulse generation (See waveform 6)
      Power switch on (IG) 11 to 14 V
      G17-12 (RRSB) - Body ground LG - Body ground Rear seat belt buckle switch RH signal Input Power switch on (IG), rear seat belt RH unfastened → Fastened Below 1 V → 11 to 14 V
      G17-13 (RCSB) - Body ground B - Body ground Rear seat belt buckle switch center signal Input Power switch on (IG), rear seat belt center unfastened → Fastened Below 1 V → 11 to 14 V
      G17-14 (RLSB) - Body ground SB - Body ground Rear seat belt buckle switch LH signal Input Power switch on (IG), rear seat belt LH unfastened → Fastened Below 1 V → 11 to 14 V
      G17-15 (OILW) - Body ground W - Body ground Engine oil level signal Input Power switch on (IG), engine oil level not low → Engine oil level low Below 1 V → 11 to 14 V
      G17-16 (WLVL) - Body ground LG - Body ground Washer fluid level signal Input Power switch on (IG), washer fluid level not low → Washer fluid level low 11 to 14 V → Below 1 V
      G17-19 (+S) - Body ground L - Body ground Speed signal for other systems (Output) Output Power switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      G17-20 (SI) - Body ground W - Body ground Speed signal for other systems (Input) Input Power switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      G17-21 (IG+) - Body ground LA-GR - Body ground Power switch signal - Power switch off → Power switch on (IG) Below 1 V → 11 to 14 V
      G17-22 (B) - Body ground LA-B - Body ground Auxiliary battery - Power switch off 11 to 14 V
      G17-25 (TR) - Body ground L - Body ground Light control rheostat switch signal Input Power switch on (IG), light control rheostat up switch (trip switch) and light control rheostat down switch (trip switch) not pushed 4.8 to 5.2 V
      G17-26 (SW3) - Body ground LA-B - Body ground Ground for trip switch - Always Below 1 Ω
      G17-29 (CANH) B CAN communication line Input/Output - -
      G17-30 (CANL) W CAN communication line Input/Output - -
      G17-31 (ES) - Body ground W-B - Body ground Ground - Always Below 1 Ω
      G17-33 (FR) - G17-32 (FE) LG - BE Fuel level signal Input Power switch on (IG), fuel level full → Fuel level low (fuel level warning light on) Pulse generation (See waveform 2)
      G17-34 (FV) - Body ground GR - Body ground Fuel sender gauge (Power source) - Power switch on (IG) Pulse generation (See waveform 3)
      G17-39 (ILL-) - Body ground L - Body ground Illumination signal Output Taillights off → Taillights on Below 1 V → Pulse generation
      G17-40 (EP) - Body ground W-B - Body ground Ground - Always Below 1 Ω
      G16-1 (B) - Body ground LA-B - Body ground Auxiliary battery - Power switch off 11 to 14 V
      G16-2 (HZSW) - Body ground W - Body ground Hazard warning switch signal Input Hazard warning signal switch assembly off → Hazard warning signal switch assembly pushed 11 to 14 V → Below 1 V
      G16-5 (TRNR) - Body ground BE - Body ground Rear turn signal light RH signal Output RH turn indicator light off → RH turn indicator light blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      G16-6 (INT) - Body ground L - Body ground Tire pressure warning ECU and receiver signal Output Power switch on (IG), OK switch on steering pad switch not pushed 8 to 15 V
      G16-7 (LR) - Body ground LA-G - Body ground Front turn signal light RH signal Output RH turn indicator light off → RH turn indicator light blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      G16-11 (TRNL) - Body ground BE - Body ground Rear turn signal light LH signal Output LH turn indicator light off → LH turn indicator light blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      G16-12 (HAZM) - Body ground B - Body ground Hazard warning indicator light signal Input Power switch on (IG), LH turn indicator light blinking → Hazard warning signal switch assembly pushed Below 1 V ←→ 11 to 14 V → Below 1 V
      G16-13 (LL) - Body ground LA-LG - Body ground Front turn signal light LH signal Output LH turn indicator light off → LH turn indicator light blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      1. Waveform 1:
        Item Condition
        Tester connection
        • G17-20 (SI) - Body ground
        • G17-19 (+S) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Power switch on (IG), wheel being rotated
        Fig 2: Waveform 1
        GTY436923Courtesy 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 G17-33 (FR) - G17-32 (FE)
        Tool setting 2.5 V/DIV., 20 ms./DIV.
        Condition Power switch on (IG), fuel level full → low (fuel level warning light on)
        Fig 3: Waveform 2
        GTY776691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        • (A) varies depending on the fuel level.
        • Power switch on (IG), fuel level full (4.1 to 4.6 V) → Fuel level low (fuel level warning light on) (0.3 to 1.1 V)
      3. Waveform 3:
        Item Condition
        Tester connection G17-34 (FV) - Body ground
        Tool setting 2.5 V/DIV., 20 ms./DIV.
        Condition Power switch on (IG)
        Fig 4: Waveform 3
        GTY801514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        Power switch on (IG) (4.5 to 5.5 V)

      4. Waveform 4:
        Item Condition
        Tester Connection G17-11 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition "Refuel Ready" displayed on multi-information display
        Fig 5: Waveform 4
        GTY704448Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      5. Waveform 5:
        Item Condition
        Tester Connection G17-11 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition "Close Fuel Lid" displayed on multi-information display
        Fig 6: Waveform 5
        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.
      6. Waveform 6:
        Item Condition
        Tester Connection G17-11 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition "Please Wait Now Opening" displayed on multi-information display
        Fig 7: Waveform 6
        GTY787551Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        This waveform is output when the internal pressure of the fuel tank is higher than the ambient pressure when the fuel lid opener switch is operated.

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