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Terminals Of Ecu

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Combination Meter Assembly Connector Terminal Identification
    GTY322569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I18-1 (B) - Body ground W - Body ground Battery Always 11 to 14 V
      I18-4 (ILL-) - Body ground SB - Body ground Illumination signal Light control switch off Below 1 V
      Light control switch on TAIL or HEAD position Pulse generation
      I18-6 (EP) - Body Ground W-B - Body ground Ground Always Below 1 Ω
      I18-7 (ES) - Body Ground BR - Body ground Ground Always Below 1 Ω
      I18-8 (SI) - Body ground P - Body ground Speed signal for other system (Input) Ignition switch to ON, wheel turns slowly. Pulse generation
      (See waveform 1 found in Fig 2)
      I18-9 (+S) - Body ground V - Body ground Speed signal for other system (Output) Ignition switch to ON, wheel turns slowly. Pulse generation
      (See waveform 1 found in Fig 2)
      I18-11 (S) - Body ground B - Body ground Oil pressure signal Ignition switch to ON, oil pressure warning light off 9 to 15 V
      Ignition switch to ON, washer warning light on Below 1 V
      I18-12 (LVWG)*1 - Body ground P - Body ground Headlight leveling signal Ignition switch to ON, leveling indicator light off 11 to 14 V
      Ignition switch to ON, leveling indicator light on Below 1 V
      I18-13 (IG+) - Body ground L - Body ground Ignition switch signal Ignition switch off Below 1 V
      Ignition switch to ON 11 to 14 V
      I18-15 (CANL) - Body ground W - Body ground CAN communication line - -
      I18-16 (CANH) - Body ground R - Body ground CAN communication line - -
      I18-17 (FE) - I18-18 (FR) V - GR Fuel signal Ignition switch to ON, fuel level not low 4 to 14 V
      Ignition switch to ON, fuel level low 4 V or less
      I18-19 (SW) - Body ground B - Body ground Brake fluid level signal Ignition switch to ON, brake warning light off 11 to 14 V
      Ignition switch to ON, brake warning light on Below 1 V
      I18-21 (CHG-) - Body ground SB - Body ground Charge warning light signal Ignition switch to ON, charge warning light off 11 to 14 V
      Ignition switch to ON, charge warning light on Below 1 V
      I18-22 (CHK) - Body ground R - Body ground MIL (Check engine warning light) signal Ignition switch to ON, MIL off 11 to 14 V
      Ignition switch to ON, MIL on Below 1 V
      I18-23 (MSSL)*2 - Body ground L - Body ground Steering pad switch assembly (DISP switch) signal Ignition switch to ON, DISP switch not pressed 4 to 5 V
      Ignition switch to ON, DISP switch pressed Below 1 V
      I18-24 (WLVL) - Body ground LG - Body ground Washer fluid level signal Ignition switch to ON, washer fluid level indicator light off 11 to 14 V
      Ignition switch to ON, washer fluid level indicator light on Below 1 V
      I17-1 (B) - Body ground R - Body ground Battery Always 11 to 14 V
      I17-3 (ER) - Body ground P - Body ground Turn RH switch signal Ignition switch to ON, RH turn switch off 11 to 14 V
      Ignition switch to ON, RH turn switch on Below 1 V
      I17-4 (EL) - Body ground L - Body ground Turn LH switch signal Ignition switch to ON, LH turn switch off 11 to 14 V
      Ignition switch to ON, LH turn switch on Below 1 V
      I17-5 (HAZ) - Body ground W - Body ground Hazard warning switch signal Ignition switch to ON, hazard warning switch off 11 to 14 V
      Ignition switch to ON, hazard warning switch on Below 1 V
      I17-7 (LL) - Body ground R - Body ground Turn LH indicator light signal Turn LH indicator light off 11 to 14 V
      Turn LH indicator light blinks 11 to 14 V ←→ Below 1 V
      I17-13 (LR) - Body ground G - Body ground Turn RH indicator light signal Turn RH indicator light off 11 to 14 V
      Turn RH indicator light blinks 11 to 14 V ←→ Below 1 V
      • *1: w/ Automatic Headlight Beam Level Control System
      • *2: w/ Multi-information Display
    2. Waveform 1 (Reference):
      Fig 2: Identifying Waveform 1
      GTY156264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Condition
      Tool setting 5 V/DIV., 20 ms./DIV.
      Vehicle condition Wheel being rotated

      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. CLOCK ASSEMBLY 
    Fig 3: Clock Assembly Connector Terminal Identification
    GTY320459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I59-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I59-5 (ILL-) - Body ground V - Body ground Illumination signal Light control switch off Below 1 V
      Light control switch TAIL or HEAD 11 to 14 V
      I59-6 (ACC) - Body ground P - Body ground Ignition switch signal Ignition switch off Below 1 V
      Ignition switch ACC 11 to 14 V
      I59-7 (B) - Body ground LG - Body ground Battery Always 11 to 14 V
  3. COMBINATION METER ASSEMBLY INNER CIRCUIT 
    Fig 4: Combination Meter Assembly Inner Circuit Diagram (1 Of 3)
    GTY315634Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Combination Meter Assembly Inner Circuit Diagram (2 Of 3)
    GTY320814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 6: Combination Meter Assembly Inner Circuit Diagram (3 Of 3)
    GTY317400Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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