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Terminals Of Ecu [05/2019 - 07/2020]

  1. COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) 
    Fig 1: Combination Meter Assembly (Meter Circuit Plate) [05/2019 - 07/2020]
    GTY688473Courtesy 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 Condition Specified Condition
      I6-1 (MSM+) - Body ground LG - Body ground Steering pad switch assembly signal Power switch on (IG), enter, back and trip switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      I6-2 (MSTI) - Body ground L - Body ground Steering pad switch assembly signal Power switch on (IG), up, down, right and left switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      I6-3 (E2) - Body ground P - Body ground Ground Always Below 1 V
      I6-5 (IND) - Body ground P - Body ground Vehicle proximity notification system warning signal Approximately 3 seconds after turning power switch on (IG) Below 1.8 V
      I6-6 (INT) - Body ground LG - Body ground Tire pressure warning reset signal
      • Power switch on (IG)
      • Steering pad switch assembly operated, "TPMS" selected on the multi-information display and "ENTER" switch (steering pad switch assembly) pressed and held
      		 Below 1.5 V
      • Power switch on (IG)
      • "ENTER" switch (steering pad switch assembly) off
      		 8 to 15 V
      I6-8 (S) - Body ground GR - Body ground Oil pressure signal Engine started 11 to 14 V
      Engine not started Below 1 V
      I6-10 (RRSB) - Body ground P - Body ground Rear seat belt buckle switch RH signal Power switch on (IG), rear seat belt RH unfastened Below 1 V
      Power switch on (IG), rear seat belt RH fastened 11 to 14 V
      I6-11 (RCSB) - Body ground R - Body ground Rear seat belt buckle switch center signal Power switch on (IG), rear seat belt center unfastened Below 1 V
      Power switch on (IG), rear seat belt center fastened 11 to 14 V
      I6-12 (RLSB) - Body ground GR - Body ground Rear seat belt buckle switch LH signal Power switch on (IG), rear seat belt LH unfastened Below 1 V
      Power switch on (IG), rear seat belt LH fastened 11 to 14 V
      I6-15 (OIL) - Body ground P - Body ground Engine oil level signal Power switch on (IG), engine oil level not low 11 to 14 V
      Power switch on (IG), engine oil level low Below 1 V
      I6-16 (WLVL) - Body ground*1 BE - Body ground Washer fluid level signal Power switch on (IG), washer fluid level not low 11 to 14 V
      Power switch on (IG), washer fluid level low Below 1 V
      I6-19 (+S) - Body ground B - Body ground Speed signal for other systems (Output) Power switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      I6-20 (SI) - Body ground LG - Body ground Speed signal for other system (Input) Power switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      I6-21 (IG+) - Body ground G - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      I6-22 (B) - Body ground W - Body ground Auxiliary battery Power switch off 11 to 14 V
      I6-23 (TWS3) - Body ground SB - Body ground Engine coolant temperature sensor signal Idling, engine coolant temperature 75 to 100°C (167 to 212°F) 0.2 to 0.6 V
      I6-24 (TR) - Body ground L - Body ground Light control rheostat switch signal Power switch on (IG), up switch and down switch (combination switch assembly) not pushed 4.6 to 5.3 V
      Power switch on (IG), up switch (combination switch assembly) pushed Below 1 V
      Power switch on (IG), down switch (combination switch assembly) pushed 2 to 3.6 V
      I6-26 (CANH) V CAN communication line - -
      I6-27 (CANL) W CAN communication line - -
      I6-28 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I6-29 (FR) - I6-30 (FE&B) L - BE Fuel level signal Power switch on (IG), fuel level full → low (fuel level warning light on) Pulse generation (See waveform 6)
      I6-31 (FV) - Body ground V - Body ground Fuel sender gauge (Power source) Power switch on (IG) Pulse generation (See waveform 5)
      I6-32 (IND) - Body ground*2 L - Body ground Heated steering wheel indicator light signal Power switch on (IG), heated steering wheel system on Below 3 V
      Power switch on (IG), heated steering wheel system off 11 to 14 V
      I6-33 (MSCH) B Local bus communication line - -
      I6-34 (MSCL) W Local bus communication line - -
      I6-37 (LST1) - Body ground R - Body ground Fuel lid operation signal "Please Wait Now Opening" displayed on multi-information display Pulse generation (See waveform 2)
      "Refuel Ready" displayed on multi-information display Pulse generation (See waveform 3)
      "Close Fuel Lid" displayed on multi-information display Pulse generation (See waveform 4)
      Power switch on (IG) 11 to 14 V
      I6-39 (ILL-) - Body ground L - Body ground Illumination signal Headlight dimmer switch off Below 1 V
      Headlight dimmer switch in tail or head position Pulse generation
      I6-40 (EP) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I7-1 (B) - Body ground G - Body ground Auxiliary battery Power switch off 11 to 14 V
      I7-2 (LP) - Body ground R - Body ground Security warning signal Security indicator light off 11 to 14 V
      Security indicator light blinking Below 1 V ←→ 11 to 14 V
      I7-3 (PAON) - Body ground W - Body ground Passenger airbag ON indicator light signal Power switch on (IG), passenger airbag ON indicator light on Below 1 V
      Power switch on (IG), passenger airbag ON indicator light off 11 to 14 V
      I7-4 (P-AB) - Body ground B - Body ground Passenger airbag OFF indicator light signal Power switch on (IG), passenger airbag OFF indicator light on Below 1 V
      Power switch on (IG), passenger airbag OFF indicator light off 11 to 14 V
      I7-5 (ER) - Body ground GR - Body ground RH turn signal switch signal Power switch on (IG), RH turn signal switch off 11 to 14 V
      Power switch on (IG), RH turn signal switch on Below 1 V
      I7-6 (LR) - Body ground SB - Body ground Front turn signal light RH signal Power switch on (IG), RH turn indicator light off Below 1 V
      Power switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      I7-7 (TRNR) - Body ground SB - Body ground Rear turn signal light RH signal Power switch on (IG), RH turn indicator light off Below 1 V
      Power switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      I7-9 (SW) - Body ground BE - Body ground Turn signal switch signal Power switch on (IG), LH and RH turn signal switch off 11 to 14 V
      Power switch on (IG), LH or RH turn signal switch on Below 1 V
      I7-10 (HAZ) - Body ground L - Body ground Hazard warning signal switch signal Hazard warning signal switch off 11 to 14 V
      Hazard warning signal switch on Below 1 V
      I7-11 (EL) - Body ground W - Body ground LH turn signal switch signal Power switch on (IG), LH turn signal switch off 11 to 14 V
      Power switch on (IG), LH turn signal switch on Below 1 V
      I7-12 (LL) - Body ground BE - Body ground Front turn signal light LH signal Power switch on (IG), LH turn indicator light off Below 1 V
      Power switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      I7-13 (TRNL) - Body ground BE - Body ground Rear turn signal light LH signal Power switch on (IG), LH turn indicator light off Below 1 V
      Power switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      1. *1: w/ Washer Fluid Level Warning
      2. *2: w/ Heated Steering Wheel System
      1. Waveform 1:
        Item Condition
        Tester Connection
        • I6-19 (+S) - Body ground
        • I6-20 (SI) - 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 I6-37 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition "Please Wait Now Opening" displayed on multi-information display
        Fig 3: Waveform 2
        GTY697319Courtesy 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.

      3. Waveform 3:
        Item Condition
        Tester Connection I6-37 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition "Refuel Ready" displayed on multi-information display
        Fig 4: Waveform 3
        GTY704448Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Waveform 4:
        Item Condition
        Tester Connection I6-37 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition "Close Fuel Lid" displayed on multi-information display
        Fig 5: Waveform 4
        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.
      5. Waveform 5:
        Fig 6: Waveform 5
        GTY801514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Condition
        Tester connection I6-31 (FV) - Body ground
        Tool setting 2.5 V/DIV., 20 ms./DIV.
        Condition Power switch on (IG)
        Specified Condition 4.5 to 5.5 V
      6. Waveform 6:
        Fig 7: Waveform 6
        GTY776691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Condition
        Tester connection I6-29 (FR) - I6-30 (FE&B)
        Tool setting 2.5 V/DIV., 20 ms./DIV.
        Condition Power switch on (IG), fuel level full → low (fuel level warning light on)

        HINT: 

        (A) varies depending on the fuel level.

        • Fuel level full: 4.2 to 4.6 V
        • Fuel level low (fuel level warning light on): 0.4 to 1.0 V
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