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Terminals Of Ecu

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Combination Meter Assembly Connectors Terminals
    G05580949Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E13 combination meter assembly connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard: 

      VOLTAGE AND RESISTANCE E13 COMBINATION METER ASSEMBLY

      Terminals No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E13-2 (IG+) - Body ground R-L - Body ground Ignition switch signal Ignition switch OFF → ON Below 1 V → 11 to 14 V
      E13-1 (B) - Body ground R - Body ground Battery Always 11 to 14 V
      E13-21 (ES)-Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Disconnect the E14 combination meter assembly connector.
    4. Measure the voltage of the wire harness side connector.

      Standard voltage: 

      VOLTAGE E14 COMBINATION METER ASSEMBLY

      Terminals No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E13-4 (SE)(1) - Body ground W - Body ground Vehicle speed signal (Output) Driving at approx. 20 km/h (12 mph) Pulse generation (see  2waveform 2)
      E13-5 (E3) - Body ground Y-B - Body ground Fuel level signal Ignition switch ON 11 to 14 V
      E13-6 (SW) - Body ground B-Y - Body ground Airbag signal Airbag warning light ON → OFF Below 1 V → 11 to 14 V
      E13-7 (WRNP) - Body ground LG - Body ground Passenger side seat belt warning light signal (Output) Ignition switch ON Front passenger seat is occupied and its seat belt is unfastened 11 to 14 V → Below 1 V
      Ignition switch ON Front passenger seat is occupied and its seat belt is fastened Below 1 V
      E13-8 (L) - Body ground G-Y - Body ground Seat belt condition signal (Driver side) D-BELT indicator light ON Below 1 V
      D-BELT indicator light OFF 11 to 14 V
      E13-9 (KSW) - Body ground V-G - Body ground Key switch condition signal Key inserted Below 1 V
      Key removed 11 to 14 V
      E13-10 (PBKL) - Body ground L-R - Body ground Front seat inner belt signal (Front passenger side) Ignition switch ON Front seat belt is unfastened or fastened (Front passenger side) Pulse generation
      E13-11 (ILL-) - Body ground BR-W - Body ground Light control rheostat signal Ignition switch OFF → ON Pulse generation (see  1waveform 1)
      E13-12 (S) - Body ground B-W - Body ground Tachometer signal Idling Pulse generation (see  2waveform 2)
      E13-13 (SI) - Body ground R-Y(1) - Body ground Vehicle speed signal (Input) Driving at approx. 20 km/h (12 mph) Pulse generation (see  2waveform 2)
      GR-R(2) - Body ground
      E13-14 (+S) - Body ground V-R - Body ground Vehicle Speed signal (Input) Ignition switch ON and wheel turning slowly Pulse generation (see  2waveform 2)
      E13-15 (TEMP) - Body ground BR-B - Body ground Engine coolant temperature Ignition switch ON Engine coolant temperature 90°C (194°F) Pulse generation (see  ewaveform 3)
      E13-16 (L) - Body ground V-W - Body ground Fuel level signal Ignition switch ON 11 to 14 V
      E13-17 (ESC) - Body ground LG-R - Body ground ABS signal ABS warning light ON → OFF Below 1 V → 11 to 14 V
      E13-18 (B)- Body ground P - Body ground Turn signal RH signal Ignition switch ON Turn signal RH indicator light OFF → ON → OFF Below 1 V → 11 to 14 V → Below 1 V
      E13-20 (B) - Body ground L-W - Body ground Turn signal LH signal Ignition switch ON Turn signal LH indicator light OFF → ON → OFF Below 1 V → 11 to 14 V → Below 1 V
      E13-23 (SW) - Body ground V-Y - Body ground All door condition signal All doors open → closed Below 1 V → 11 to 14 V
      E13-26 (+) - Body ground R-W - Body ground HEAD light signal Light control switch OFF → ON Below 1 V → 11 to 14 V
      E13-29 (DOOR) - Body ground W-L - Body ground Driver side door open Driver side door open → closed Below 1 V → 11 to 14 V
      E13-31 (PKB) - Body ground B-L - Body ground Brake fluid level warning light signal Ignition switch ON Brake fluid level warning light ON → OFF Below 1 V → 11 to 14 V
      E13-32 (TIRE) - Body ground P-B - Body ground Tire pressure warning light signal Ignition switch ON Tire pressure warning light ON 0.9 to 3.2 V
      Ignition switch ON Tire pressure warning light OFF 3.2 V or higher
      E14-1 (RRSW)(8) - Body ground L-Y - Body ground Rear differential lock signal Rear differential lock warning light ON → OFF Below 1 V → 11 to 14 V
      E14-2 (SW)(4) - Body ground R-L(3) - Body ground 4WD signal 4WD indicator OFF → ON Below 1 V → 11 to 14 V
      GR(1) - Body ground
      E14-3 (CHG-) - Body ground GR - Body ground Change signal Ignition switch ON → OFF 11 to 14 V → Below 1 V
      E14-4 (A/D)(6) - Body ground P-G - Body ground Cruise signal Cruise indicator ON → OFF Below 1 V → 11 to 14 V
      E14-5 (TROF)(8) - Body ground L-W - Body ground VSC OFF signal VSC OFF indicator ON → OFF Below 1 V→11 to 14 V
      E14-6 (VSCW) - Body ground Y-R - Body ground VSC TRAC signal VSC TRAC indicator ON → OFF Below 1 V → 11 to 14 V
      E14-7 (SLIP) - Body ground R - Body ground SLIP signal SLIP warning light ON → OFF Below 1 V → 11 to 14 V
      E14-8 (CHK) - Body ground R-B - Body ground Check engine warning light signal Check engine warning light signal ON → OFF Below 1V → 11 to 14 V
      E14-9 (ATRA)(7) - Body ground Y-V - Body ground A-TRAC signal A-TRAC indicator light ON → OFF Below 1V → 11 to 14 V
      E14-10 (ALSD)(5) - Body ground BR-Y - Body ground AUTO LSD signal AUTO LSD indicator light ON → OFF Below 1V → 11 to 14 V
      E14-11 (OILW)(2) - Body ground P - Body ground A/T oil temperature signal A/T OIL TEMP warning light ON → OFF Below 1 V → 11 to 14 V
      E14-12 (S) - Body ground LG-B - Body ground Oil pressure signal Oil pressure warning light ON → OFF Below 1 V → 11 to 14 V
      E14-13 (ILL+) - Body ground G - Body ground Taillight signal Light control switch OFF → ON Below 1 V → 11 to 14 V
      E14-14 (L)(2) - Body ground B-L - Body ground A/T shift position signal (L) A/T L indicator OFF → ON Below 1 V → 11 to 14 V
      E14-15 (2)(2) - Body ground P-L - Body ground A/T shift position signal (2) A/T 2 indicator OFF → ON Below 1 V→11 to 14 V
      E14-16 (3)(2) - Body ground W-R - Body ground A/T shift position signal (3) A/T 3 indicator OFF → ON Below 1 V → 11 to 14 V
      E14-17 (4)(2) - Body ground B-O - Body ground A/T shift position signal (4) A/T 4 indicator OFF → ON Below 1 V → 11 to 14 V
      E14-18 (D)(2) - Body ground R-G - Body ground A/T shift position signal (D) A/T D indicator OFF → ON Below 1 V → 11 to 14 V
      E14-19 (N)(2) - Body ground G-W - Body ground A/T shift position signal (N) A/T N indicator OFF → ON Below 1 V → 11 to 14 V
      E14-20 (R)(2) - Body ground R-Y - Body ground A/T shift position signal (R) A/T R indicator OFF → ON Below 1 V → 11 to 14 V
      E14-20 (R)(1) - Body ground R-Y - Body ground M/T shift position signal (R) M/T shift warning buzzer OFF → ON Below 1 V → 11 to 14 V
      E14-21 (P)(2) - Body ground Y-B - Body ground A/T shift position signal (P) A/T P indicator OFF → ON Below 1 V → 11 to 14 V
      E14-22 (A/T3)(3) - Body ground W - Body ground Transfer indicator switch neutral position signal AT P indicator OFF → ON Below 1 V → 11 to 14 V
      (1) for Manual Transmission
      (2) for Automatic Transmission (2WD and 4WD)
      (3) for Automatic Transmission (4WD only)
      (4) for 4WD
      (5) for 2WD
      (6) Vehicles with cruise control
      (7) Vehicles with active traction control (4WD only)
      (8) Vehicles with rear differential lock

      HINT:

      If the result is not as specified, the combination meter assembly may be malfunctioning.

      1. Waveform 1: Using an oscilloscope
        WAVEFORM 1 REFERENCE

        Terminal Connections E13-11 (ILL-) - Body Ground
        Tool Setting 5V / DIV, 50 ms / DIV
        Condition Ignition switch ON
        Fig 2: Identifying Waveform 1
        G05580950Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2: Using an oscilloscope
        WAVEFORM 2 REFERENCE

        Terminal Connections E13-4 (SE) - Body Ground
        E13-12 (S) - Body Ground
        E13-13 (SI) - Body Ground
        E13-14 (+S) - Body Ground
        Tool Setting 5 V / DIV, 20 ms / DIV
        Condition Driving at approximately 20km/h (12mph)
        Fig 3: Identifying Waveform 2
        G05580951Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        As the vehicle speed increases, the cycle of the signal waveform narrows.

    5. Waveform 3: Using an oscilloscope
      WAVEFORM 3 REFERENCE

      Terminal Connections E13-15 (TEMP) - Body ground
      Tool setting 5 V/DIV., 0.1 sec./DIV
      Vehicle condition Ignition switch ON
      Fig 4: Identifying Waveform 3
      G05580952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      A changes in accordance with the engine coolant temperature.

      REFERENCE CHART

      Coolant temperature Below 30° Approximately 75°C Above 90°
      A Approximately 16 msec Approximately 204 msec Approximately 262 msec
  2. ACCESSORY METER ASSEMBLY 
    Fig 5: Identifying Accessory Meter Connector Terminals
    G05580953Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F1 accessory meter assembly connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard: 

      VOLTAGE AND RESISTANCE F1 ACCESSORY METER ASSEMBLY

      Terminals No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F1-1 (+B) - Body ground R - Body ground Battery Always 11 to 14 V
      F1-2 (ACC) - Body ground GR - Body ground ACC Ignition switch OFF → ACC Below 1 V → 11 to 14 V
      F1-3 (IG+)- Body ground Y-R - Body ground Ignition switch signal Ignition switch OFF → ON Below 1 V → 11 to 14 V
      F1-4 (DMIN) - Body ground R-L - Body ground Air conditioning amplifier signal Ignition switch OFF → ON Below 1 V → 11 to 14 V
      F1-6 (ILL+) - Body ground G - Body ground Taillight signal Light control switch OFF → ON Below 1 V → 11 to 14 V
      F1-7 (ILL-) -Body ground BR-W - Body ground Light control rheostat signal Ignition switch OFF → ON Pulse generation (see  1waveform 1)
      F1-8 (SI) -Body ground V-R - Body ground Combination meter signal Driving at approx. 5 km/h (3.1 mph) 1 V → 9 V → 1 V Pulse generation (see  2waveform 2)
      F1-9 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

      HINT:

      If the result is not as specified, the accessory meter assembly may be malfunctioning.

      1. Waveform 1: Using an oscilloscope
        WAVEFORM 1 REFERENCE

        Terminal Connections F1-7 (ILL-) - Body Ground
        Tool Setting 5V / DIV, 50 ms / DIV
        Condition Ignition switch ON
        Fig 6: Identifying Waveform 1
        G05580954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2: Using an oscilloscope
        WAVEFORM 2 REFERENCE

        Terminal Connections F1-8 (SI) - Body Ground
        Tool Setting 5V / DIV, 20 msec / DIV
        Condition Driving at approx. 5 km/h (3.1 mph)
        Fig 7: Identifying Waveform 2
        G05580955Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK MAIN BODY ECU 
    Fig 8: Identifying Main Body ECU Connectors Terminals
    G05580956Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E7, E8 and 1A main body ECU connectors.
    2. Measure the voltage of the wire harness side connectors.

      Standard voltage 

      VOLTAGE AND MAIN BODY ECU CONNECTORS

      Terminals No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E7-2 (PKB) - Body ground W-R(1) - Body ground Parking brake signal Parking brake warning light ON → OFF Below 1 V → 11 to 14 V
      E7-7 (BCTY) - Body ground W - Body ground Back door courtesy switch and back window courtesy switch input Back door CLOSED → OPEN 11 to 14 V → Below 1 V
      E7-11 (RLCY) - Body ground P-B - Body ground Rear door courtesy switch signal (LH) Rear door (Driver side) CLOSED → OPEN 11 to 14 V → Below 1 V
      E7-12 (RRCY) - Body ground P-L - Body ground Rear door courtesy switch signal (RH) Rear door (Front passenger side) CLOSED → OPEN 11 to 14 V → Below 1 V
      E7-23 (DCTY) - Body ground R-B - Body ground Front door courtesy switch signal (Driver side) Driver door CLOSED → OPEN 11 to 14 V → Below 1 V
      E7-24 (PCTY) - Body ground G-Y - Body ground Front door courtesy switch signal (Passenger side) Front passenger door CLOSED → OPEN 11 to 14 V → Below 1 V
      E8-14 (KSW) - Body ground G-Y - Body ground Key unlock switch condition signal Key inserted → Removed Below 1 V → 11 to 14 V
      1A-7 (GND2) - Body ground) W - Body ground Ground Always Below 1 V
      (1) Vehicles with daytime running light system

      HINT:

      If the result is not as specified, there may be a malfunction in the wire harness.

  4. COMBINATION METER INTERNAL CIRCUIT 
    Fig 9: Combination Meter Internal Circuit Diagram (1 Of 3)
    G05580957Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 10: Combination Meter Internal Circuit Diagram (2 Of 3)
    G05580958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 11: Combination Meter Internal Circuit Diagram (3 Of 3)
    G05580959Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Connectors 

    CONNECTORS TERMINALS REFERENCE

    Terminal No. Wire Harness Side
    E13 1 Battery
    2 Ignition Switch
    4 Speed Sensor (1)
    5 Fuel Suction Pump and Gauge Assembly
    6 Center Airbag Sensor Assembly
    7 Passenger Seat Belt Warning Light
    8 Driver Seat Buckle Switch
    9 Key Unlock Warning Switch
    10 Center Airbag Sensor Assembly
    11 Light Control Rheostat
    12 Air Conditioning Amplifier
    13 Speed Sensor (1)
    Skid Control ECU (2)
    14 4P-OUT (Other Parts)
    15 ECM
    16 Fuel Suction Pump and Gauge Assembly
    17 Skid Control ECU
    18 Turn Signal Flasher Assembly
    20 Turn Signal Flasher Assembly
    21 Body Ground
    23 Main Body ECU
    26 Main Body ECU (3)
    Headlight Relay (4)
    29 Main Body ECU
    31 Skid Control ECU
    32 Tire Pressure Warning ECU
    E14 1 Rear Differential Lock Switch (8)
    2 4WD Control ECU (1)
    Transfer Indicator Switch (2)
    3 Generator (Alternator)
    4 ECM (6)
    5 Skid Control ECU (8)
    6 Skid Control ECU
    7 Skid Control ECU
    8 ECM
    9 Skid Control ECU (7)
    10 Skid Control ECU (5)
    11 ECM (2)
    12 Engine Oil Pressure Switch
    13 TAIL Fuse
    14 Transmission Control Switch (2)
    15 Transmission Control Switch (2)
    16 Transmission Control Switch (2)
    17 Transmission Control Switch (2)
    18 Transmission Control Switch (2)
    19 Transmission Control Switch (2)
    20 Back up Light Switch (1)
    21 Park/Neutral Position Switch (2)
    22 Transfer Indicator Switch (Neutral Position) (3)
    (1) for Manual Transmission
    (2) for Automatic Transmission
    (3) Vehicle with Daytime Running Light System
    (4) Vehicle without Daytime Running Light System
    (5) for 2WD
    (6) Vehicle with Cruise Control
    (7) Vehicle with Active Traction Control (4WD only)
    (8) Vehicle with Rear Differential Lock
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