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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 66 (Meter / Gauge System (HEV) - Diagnostics - Introduction (2 Of 2)) >> METER / GAUGE SYSTEM (for HV Model) >> Terminals Of Ecu [01/2019 - 04/2020] >> Terminals Of Ecu [01/2019 - 04/2020]

Terminals Of Ecu [01/2019 - 04/2020]

WARNING: This page is about a different variant/trim than selected.
  1. COMBINATION METER ASSEMBLY 
    GTY928661Courtesy 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
      I4-1 (B) - Body ground SB - Body ground Auxiliary battery - Power switch off 11 to 14 V
      I4-9 (CANH) L CAN communication line Input/output - -
      I4-10 (MSCL)*1 W Local bus communication line Input/output - -
      I4-11 (SW3) - Body ground BR - Body ground Light control rheostat (Ground) - Always Below 1 Ω
      I4-14 (FV) - Body ground GR - Body ground Fuel sender gauge (Power source) Input Power switch on (IG) Pulse generation
      (See waveform 2)
      I4-15 (MSTI) - Body ground V - Body ground Steering pad switch signal Input Power switch on (IG), up, down, right and left switches on steering pad switch not pushed 4.8 to 5.2 V
      I4-16 (SW2) - Body ground P - Body ground Light control rheostat signal Input Power switch on (IG), light control rheostat knob fully turned downward → fully turned upward Below 1 V → 4 to 6 V
      (Gradually change)
      I4-17 (TC) - Body ground V - Body ground Tail cancel switch signal Input Power switch on (IG), light control rheostat knob not fully turned upward (Tail cancel switch off) → fully turned upward (Tail cancel switch on) Below 1 V → 4 to 6 V
      I4-19 (EP) - Body ground W-B - Body ground Ground - Always Below 1 Ω
      I4-20 (SI) - Body ground GR - Body ground Speed signal for other system (Input) Input Power switch on (IG), wheel being rotated Pulse generation
      (See waveform 1)
      I4-22 (B) - Body ground G - Body ground Auxiliary battery - Always 11 to 14 V
      I4-23 (ES) - Body ground W-B - Body ground Ground - Always Below 1 Ω
      I4-24 (FE&B) -Body ground P - Body ground Fuel sender gauge (Ground) - Always Below 1 Ω
      I4-25 (CANL) W CAN communication line Input/output - -
      I4-27 (MSCH)*1 LG Local bus communication line Input/output - -
      I4-31 (FR) - I4-24 (FE&B) R - P Fuel level signal Input Power switch on (IG), fuel level full → low (fuel level warning light on) Pulse generation
      (See waveform 2)
      I4-32 (MSM+) - Body ground GR - Body ground Steering pad switch signal Input Power switch on (IG), OK and back switches on steering pad switch not pushed 4.8 to 5.2 V
      I4-34 (SW1) - Body ground R - Body ground Light control rheostat (Power source) Input Power switch on (IG) 4 to 6 V
      I4-35 (ILL-) - Body ground L - Body ground Illumination signal Output Taillights off → on Below 1 V → Pulse generation
      I4-36 (+S) - Body ground SB - Body ground Speed signal for other systems (Output) Output Power switch on (IG), wheel being rotated Pulse generation
      (See waveform 1)
      I4-38 (IG+) - Body ground LG - Body ground Power switch signal Input Power switch off → Power switch on (IG) Below 1 V → 11 to 14 V
      I5-1 (LL) - Body ground R - Body ground LH turn signal Output LH turn indicator light off → blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      I5-2 (LR) - Body ground V - Body ground RH turn signal Output RH turn indicator light off → blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      I5-5 (TRNL) - Body ground V - Body ground LH turn signal Output LH turn indicator light off → blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      I5-6 (TRNR) - Body ground G - Body ground RH turn signal Output RH turn indicator light off → blinking Below 1 V → 11 to 14 V ←→ Below 1 V
      I5-7 (LP) - Body ground P - Body ground Security indicator signal Input Security indicator light off → blinking Below 2 V → Pulse generation
      I5-14 (WLVL) - Body ground*2 L - Body ground Washer fluid level signal Input Power switch on (IG), washer fluid level not low → low 11 to 14 V → Below 1 V
      I5-17 (HAZ) - Body ground P - Body ground Hazard warning signal switch signal Input Hazard warning signal switch off → on 11 to 14 V → Below 1 V
      I5-19 (RCSB) - Body ground*3 W - Body ground Rear center seat belt warning signal Input Power switch on (IG) rear center seat belt unfastened → fastened Below 1 V → 11 to 14 V
      I5-23 (S) - Body ground G - Body ground Engine oil pressure signal Input Engine started → not started 11 to 14 V → Below 1 V
      I5-24 (INT) - Body ground*4 B - Body ground Tire pressure warning system signal Output Power switch on (IG), OK switch on steering pad switch not pushed 8 to 15 V
      I5-31 (OILW) - Body ground B - Body ground Engine oil level signal Input Power switch on (IG), engine oil level not low → low Below 1 V → 11 to 14 V
      I5-33 (LST1) - Body ground*5 Y - Body ground Fuel lid status signal Input Power switch off 11 to 14 V
      The following message (interrupt display) being displayed on the multi-information display:
      1. Please Wait Fuel Door Opening
      		 Pulse generation
      (See waveform 4)
      The following message (interrupt display) being displayed on the multi-information display:
      1. Ready to Refuel
      		 Pulse generation
      (See waveform 5)
      The following message (interrupt display) being displayed on the multi-information display:
      1. Close Fuel Lid
      		 Pulse generation
      (See waveform 6)
      I5-35 (RRSB) - Body ground*3 R - Body ground Rear right seat belt warning signal Input Power switch on (IG) rear right seat belt unfastened → fastened Below 1 V → 11 to 14 V
      I5-36 (RLSB) - Body ground*3 G - Body ground Rear left seat belt warning signal Input Power switch on (IG) rear left seat belt unfastened → fastened Below 1 V → 11 to 14 V
      1. *1: w/ Audio Tab Display
      2. *2: w/ Washer Fluid Level Warning
      3. *3: w/ Rear Seat Belt Warning
      4. *4: w/ Tire Pressure Warning System
      5. *5: w/ Canister Pump Module
      1. GTY801514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 1:

        Item Condition
        Tester connection I4-14 (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
      1. WAVEFORM 2:

        Item Condition
        Tester connection
        • I4-20 (SI) - Body ground
        • I4-36 (+S) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Power switch on (IG), wheel being rotated
        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.

      1. WAVEFORM 3:

        Item Condition
        Tester connection I4-31 (FR) - I4-24 (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)
        GTY776691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        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): 0.3 to 1.1 V
      1. WAVEFORM 4:

        Item Condition
        Tester Connection I5-33 (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. Please Wait Fuel Door Opening
        GTY847873Courtesy 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.

      1. GTY858121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 5:

        Item Condition
        Tester Connection I5-33 (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
      1. WAVEFORM 6:

        Item Condition
        Tester Connection I5-33 (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
        GTY852328Courtesy 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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