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Terminals Of Ecu

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Combination Meter Connector Terminal Identification
    GTY150623Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J34-1 (E2) - Body ground W-B - Body ground Ground Always Below 1 V
      J34-2 (FE) - Body ground BR - Body ground Ground (Fuel ground) Always Below 1 V
      J34-4 (INT) - Body ground LG - Body ground Tire pressure select switch signal Engine switch on (IG), tire pressure select display on 8 to 15 V
      Engine switch on (IG), tire pressure select display off Below 1.5 V
      J34-5 (+S) - Body ground P - Body ground Speed signal (Output) Wheel turned slowly Pulse generation
      (See waveform 1)
      J34-6 (MPX+) - Body ground BR - Body ground Multiplex communication signal Engine switch on (IG) Pulse generation
      J34-8 (TC) - Body ground P - Body ground Light control rheostat signal Engine switch on (IG), the light control rheostat knob at MAX. position (turns fully clockwise) 4 to 6 V
      Engine switch on (IG), the light control rheostat knob at MIN. position (turns fully counterclockwise) Below 1 V
      J34-9 (ILL+) - Body ground V - Body ground Light control rheostat signal Engine switch on (IG), combination switch except off 4 to 6 V
      J34-11 (B) - Body ground L - Body ground Turn indicator light signal Engine switch on (IG), turn signal LH indicator light off Below 1 V
      Engine switch on (IG), turn signal LH indicator light blinks 11 to 14 V
      J34-12 (IG+) - Body ground BE - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      J34-13 (ES) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 V
      J34-14 (ET) - Body ground Y - Body ground Ground (Rheostat ground) Always Below 1 V
      J34-15 (INT) - Body ground P - Body ground Tire pressure initial switch signal Engine switch on (IG), tire pressure initial message displayed 8 to 15 V
      Engine switch on (IG), tire pressure initial message not displayed Below 1.5 V
      J34-16 (S) - Body ground W - Body ground Tachometer signal Engine switch on (IG), engine idle speed Pulse generation
      (See waveform 2)
      J34-17 (SI) - Body ground V - Body ground Speed signal (Input) Engine switch on (IG), wheel turned slowly Pulse generation
      (See waveform 1)
      J34-18 (MPX-) - Body ground BR - Body ground Multiplex communication signal Engine switch on (IG) Pulse generation
      J34-19 (FR) - Body ground SB - Body ground Fuel signal Engine switch on (IG), fuel level FULL Below 1 V
      Engine switch on (IG), fuel level EMPTY 4 to 7 V
      J34-20 (MSSL) - Body ground Y - Body ground Steering pad switch Assembly signal Engine switch on (IG), DISP switch not pressed 4 to 6 V
      Engine switch on (IG), DISP switch pressed Below 1 V
      J34-21 (TR) - Body ground B - Body ground Light control rheostat signal Engine switch on (IG), the light control rheostat knob at MIN. position (turns fully counterclockwise). Below 1 V
      Engine switch on (IG), the light control rheostat knob at MAX. position (turns fully clockwise). 4 to 6 V
      J34-23 (B) - Body ground L - Body ground Battery Always 11 to 14 V
      J34-24 (B) - Body ground LG - Body ground Battery Always 11 to 14 V
      J35-3 (PBLT) - Body ground P - Body ground Front seat inner belt assembly (for passenger side) signal Sit in the front passenger seat, engine switch on (IG), front passenger side seat belt unfastened 11 to 14 V
      Sit in the front passenger seat, engine switch on (IG), front passenger side seat belt fastened Below 1 V
      J35-4 (P/SB)*1 - Body ground L - Body ground Passenger seat inner belt signal Engine switch on (IG), passenger seat belt unfastened 11 to 14 V
      Engine switch on (IG), passenger seat belt fastened Below 1 V
      J35-5 (VSW) - Body ground GR - Body ground Satellite switch set RH signal Engine switch on (IG), satellite switch set RH not pressed 11 to 14 V
      Engine switch on (IG), satellite switch set RH pressed Below 1 V
      J35-6 (MSW) - Body ground BE - Body ground Satellite switch set LH signal Engine switch on (IG), satellite switch set LH not pressed 11 to 14 V
      Engine switch on (IG), satellite switch set LH pressed Below 1 V
      J35-7 (SW) - Body ground V - Body ground Satellite switch set ON/OFF signal Engine switch on (IG), satellite switch set ON/OFF not pressed 11 to 14 V
      Engine switch on (IG), satellite switch set ON/OFF pressed Below 1 V
      J35-9 (ILL-) - Body ground W - Body ground Illumination signal Engine switch on (IG) Pulse generation
      J35-10 (B) - Body ground R - Body ground Turn indicator light signal Engine switch on (IG), turn signal RH indicator light off Below 1 V
      Engine switch on (IG), turn signal RH indicator light blinks 11 to 14 V
      J35-12 (EFI) - Body ground SB - Body ground MIL (Check engine indicator light) signal Engine switch on (IG), MIL on Below 1 V
      Engine switch on (IG), MIL off 11 to 14 V
      J35-15 (SW) - Body ground LG - Body ground Brake fluid level warning light signal Engine switch on (IG), brake warning light off 11 to 14 V
      Engine switch on (IG), brake warning light on Below 1.5 V
      • *1: w/o Occupant Classification System
    2. Waveform 1 (Reference) : Using an oscilloscope:
      Fig 2: Identifying Waveform 1 Graph
      GTY156264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      OK:

      Item Condition
      Tool setting 5 V/DIV., 20 ms./DIV.
      Vehicle condition Driving at approx. 20 km/h (12 mph)

      HINT: 

      When the system is functioning normally, one drive wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

    3. Waveform 2 (Reference) : Using an oscilloscope:
      Fig 3: Signal Waveform 2 Graph
      GTY141070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      OK:

      Item Condition
      Tool setting 5 V/DIV., 10 ms./DIV.
      Vehicle condition Engine idle speed
  2. INTEGRATION CONTROL AND PANEL ASSEMBLY (w/o Navigation System w/o Multi-display) 
    Fig 4: J54 Connector Terminal Identification
    GTY137040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J54-3 (ILL+) - Body ground G - Body ground Illumination signal Combination switch off Below 1 V
      Combination switch Head 11 to 14 V
      J54-4 (IG+) - Body ground B - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      J54-5 (ACC) - Body ground BE - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      J54-8 (E) - Body ground W-B - Body ground Ground Always Below 1 V
      J54-10 (ILL-) - Body ground W - Body ground Illumination Signal Engine switch on (IG), combination switch Head, and light control rheostat position MAX. Pulse generation
      J54-14 (+B) - Body ground LG - Body ground Battery Always 11 to 14 V
  3. CLOCK ASSEMBLY (w/ Navigation System) or (w/o Navigation System w/ Multi-display) 
    Fig 5: J92 Connector Terminal Identification
    GTY254037Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J92-3 (E) - Body ground W-B - Body ground Ground Always Below 1 V
      J92-5 (ILL+) - Body ground G - Body ground Illumination signal Combination switch off Below 1 V
      Combination switch Head 11 to 14 V
      J92-6 (ACC) - Body ground BE - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      J92-7 (B) - Body ground LG - Body ground Battery Always 11 to 14 V
      J92-14 (ILL-) - Body ground W - Body ground Illumination signal Engine switch on (IG), combination switch Head, and light control rheostat position MAX. Pulse generation
      J92-15 (IG+) - Body ground B - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
  4. COMBINATION METER ASSEMBLY INNER CIRCUIT 
    1. Combination Meter Assembly Inner Circuit
      Fig 6: Combination Meter Assembly Inner Circuit (1 Of 3)
      GTY354249Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 7: Combination Meter Assembly Inner Circuit (2 Of 3)
      GTY357734Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 8: Combination Meter Assembly Inner Circuit (3 Of 3)
      GTY394619Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Terminal No. Wire Harness Side (Symbol)
      J34 1 Ground (E2)
      2 Fuel Sender Gauge Assembly (FE)
      3 -
      4 Tire Pressure Warning ECU*7 (INT)
      5 Each part that uses speed signal (+S)
      6 Multiplex Communication Line (MPX+)
      7 -
      8 Light Control Rheostat (TC)
      9 Light Control Rheostat (ILL+)
      10 -
      11 Turn Signal Flasher (B)
      12 GAUGE Fuse (IG+)
      13 Ground (ES)
      14 Light Control Rheostat (ET)
      15 Tire Pressure Warning ECU*7 (INT)
      16 ECM (S)
      17 Skid Control ECU (SI)
      18 Multiplex Communication Line (MPX-)
      19 Fuel Sender Gauge Assembly (FR)
      20 Steering Pad Switch Assembly (MSSL)
      21 Light Control Rheostat (TR)
      22 -
      23 DOME Fuse (B)
      24 MPX-B Fuse (B)
      J35 1 -
      2 -
      3 Integration Control and Panel Assembly*9 or Clock Assembly*10, *11 (PBLT)
      4 Front Seat Inner Belt Assembly RH*8 (P/SB)
      5 Satellite Switch Set (VSW)
      6 Satellite Switch Set (MSW)
      7 Satellite Switch Set (SW)
      8 -
      9 Illumination Parts (ILL-)
      10 Turn Signal Flasher (B)
      11 -
      12 ECM (EFI)
      13 -
      14 -
      15 Brake Fluid Level Warning Switch (SW)
      16 -
      • *7: w/ Tire Pressure Warning System
      • *8: w/o Occupant Classification System
      • *9: w/o Navigation System w/o Multi-display
      • *10: w/ Navigation System
      • *11: w/o Navigation System w/ Multi-display
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