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Terminals Of Ecu

  1. CHECK COMBINATION METER ASSEMBLY (METER ECU) 
    Fig 1: Combination Meter Assembly (Meter ECU) Connector Terminal Identification
    GTY211003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E19 meter connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      TX1+ (E19-11) - Body ground G - Body ground Ground (ambient temperature sensor ground) Always 10 kΩ or higher
      E (E19-12) - Body ground BR - Body ground Ground (fuel gauge ground) Always 10 kΩ or higher
      IG+ (E19-21) - Body ground B - Body ground Ignition power supply Ignition switch off Below 1 V
      IG+ (E19-21) - Body ground B - Body ground Ignition power supply Ignition switch ON 11 to 14 V
      B (E19-22) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      ET (E19-33) - Body ground BR - Body ground Ground (meter ground) Always Below 1 Ω
      SW3 (E19-34) - Body ground P - Body ground Ground (rheostat ground) Always 10 kΩ or higher
      ILL- (E19-35) - Body ground BR - Body ground Ground (illumination ground) Always Below 1 Ω
      • If the result is not as specified, there may be a malfunction on the wire harness side.
    3. Reconnect the E19 meter connector.
    4. Measure the voltage of the connector.
      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (E19-1) - Body ground L - Body ground Turn signal R Ignition switch ON, turn signal RH indicator light OFF Below 1 V
      B (E19-1) - Body ground L - Body ground Turn signal R Ignition switch ON, turn signal RH indicator light ON 11 to 14 V
      ILL+ (E19-2) - Body ground G - Body ground Illumination signal Taillight OFF Below 1 V
      ILL+ (E19-2) - Body ground G - Body ground Illumination signal Taillight ON 11 to 14 V
      B (E19-3) - Body ground Y - Body ground Turn signal L Ignition switch ON, turn signal LH indicator light OFF Below 1 V
      B (E19-3) - Body ground Y - Body ground Turn signal L Ignition switch ON, turn signal LH indicator light ON 11 to 14 V
      TIRE (E19-5) - Body ground P - Body ground Tire pressure warning signal Tire pressure warning indicator ON 0.9 to 3.2 V
      TIRE (E19-5) - Body ground P - Body ground Tire pressure warning signal Tire pressure warning indicator OFF Below 0.9 V
      S (E19-6) - Body ground L - Body ground Low engine oil pressure warning signal Low engine oil pressure warning light ON Below 1 V
      S (E19-6) - Body ground L - Body ground Low engine oil pressure warning signal Low engine oil pressure warning light OFF 11 to 14 V
      EFI (E19-8) - Body ground R - Body ground MIL MIL ON Below 4.2 V
      EFI (E19-8) - Body ground R - Body ground MIL MIL OFF 11 to 14 V
      MSCH (E19-9)* - Body ground LG - Body ground CAN communication line Ignition switch ON Pulse generation
      MSCL (E19-10)* - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      CHG- (E19-13) - Body ground L - Body ground MIL MIL ON Below 1.5 V
      CHG- (E19-13) - Body ground L - Body ground MIL MIL OFF 11 to 14 V
      SW (E19-14) - Body ground Y - Body ground Brake fluid level signal Brake fluid level warning light ON Below 1 V
      SW (E19-14) - Body ground Y - Body ground Brake fluid level signal Brake fluid level warning light OFF 11 to 14 V
      WLVL (E19-15) - Body ground LG - Body ground Washer level signal Washer level warning light ON Below 1 V
      WLVL (E19-15) - Body ground LG - Body ground Washer level signal Washer level warning light OFF 11 to 14 V
      MSSL (E19-18) - Body ground P - Body ground Spiral cable signal Ignition switch ON, steering pad switch signal DISP off Below 1 V
      MSSL (E19-18) - Body ground P - Body ground Spiral cable signal Ignition switch ON, steering pad switch signal DISP on 11 to 14 V
      L (E19-24) - Body ground Y - Body ground Fuel level signal Ignition switch ON, fuel level is FULL Below 1 V
      L (E19-24) - Body ground Y - Body ground Fuel level signal Ignition switch ON, fuel level is EMPTY 4 to 7 V
      SW1 (E19-26) - Body ground V - Body ground Light control rheostat signal Ignition switch ON 4 to 6 V
      SW2 (E19-27) - Body ground GR - Body ground Light control rheostat signal Ignition switch ON, rheostat knob position MIN → MAX Below 1 V → 4 to 6 V
      TEMP (E19-28) - Body ground W - Body ground Ambient temperature sensor signal Ignition switch ON 1 to 2 V (25°C (77°F))
      TC (E19-30) - Body ground G - Body ground Tail cancel switch signal Ignition switch ON, tail cancel switch OFF 4 to 6 V
      TC (E19-30) - Body ground G - Body ground Tail cancel switch signal Ignition switch ON, tail cancel switch ON Below 1 V
      CANL (E19-31) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      CANH (E19-32) - Body ground G - Body ground CAN communication line Ignition switch ON Pulse generation
      SW3 (E19-34) - Body ground P - Body ground Light control rheostat signal Always Below 1 V
      IND1 (E19-36) - Body ground L - Body ground Illumination signal Light control rheostat position Mid. Pulse generation
      IND2 (E19-37) - Body ground LG - Body ground Illumination signal Light control rheostat position Mid. Pulse generation
      SI (E19-38) - Body ground V - Body ground Speed signal (input) Ignition switch ON, slowly turn wheel Pulse generation
      +S (E19-39) - Body ground V - Body ground Speed signal (output) (4P-OUT) Ignition switch ON, slowly turn wheel Pulse generation
      PBLT (E19-40) - Body ground LG - Body ground Front passenger side seat belt condition output signal Seat belt indicator OFF 11 to 14 V
      PBLT (E19-40) - Body ground LG - Body ground Front passenger side seat belt condition output signal Seat belt indicator blinking Below 1 V ←→ 11 to 14 V

      *: w/ Smart Key System

      • If the result is not as specified, the combination meter may be malfunctioning.
      Fig 2: Identifying Meter / Gauge System Circuit Diagram (1 Of 3)
      GTY247518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Identifying Meter / Gauge System Circuit Diagram (2 Of 3)
      GTY234463Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Identifying Meter / Gauge System Circuit Diagram (3 Of 3)
      GTY226911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TABLE OF TERMINAL CONNECTION

      Terminal No. Wire Harness Side
      E19 1 Turn Signal Flasher
      2 ILL+
      3 Turn Signal Flasher
      4 -
      5 Tire Pressure Warning ECU
      6 Low Oil Pressure Warning Switch
      7 -
      8 ECM
      9 CAN-Hi
      10 CAN-Lo
      11 Ambient Temperature Sensor (GND)
      12 Fuel Sender Gauge (GND)
      13 Generator Assembly
      14 Brake Fluid Level Warning Switch
      15 Washer Level Warning Switch
      16 -
      17 -
      18 Steering Pad Switch
      19 -
      20 -
      21 Ignition Switch
      22 Battery
      23 -
      24 Fuel Sender Gauge
      25 -
      26 Rheostat (Output)
      27 Rheostat (Input)
      28 Ambient Temperature Sensor
      29 -
      30 Tail Cancel
      31 CAN-Lo
      32 CAN-Hi
      33 GND
      34 Rheostat (GND)
      35 Other Devices (GND)
      36 Other Devices (BULB)
      37 Other Devices (LED)
      38 Brake Actuator (Skid Control ECU) (SP)
      39 ECM (4P-OUT)
      40 Seat Belt Warning Light for Passenger's Seat
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