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Terminals Of Ecu

  1. INSPECT INSTRUMENT PANEL J/B ASSY (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Inspecting Instrument Panel J/B Assy (Multiplex Network Body ECU)
    G03487524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B5 ECU, 1D, 1E, 1F, 1M and 1R J/B connectors.
    2. Check the voltage and resistance between each terminal of the wire harness side connectors.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BECU (1D-10) - L-B - Body ground +B (ECUB) power supply Constant 10 to 14 V
    Body ground
    BECU (1F-1) - SB - Body ground +B (ECUB) power supply Constant 10 to 14 V
    Body ground
    MPX1 (1E-7) - BR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX1 (1R-9) - LG - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX2 (B5-21) - GR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND1 (1F-10) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground
    GND2 (1M-9) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  2. CHECK INTEGRATION SWITCH (w/o LEXUS NAVIGATION SYSTEM) 
    Fig 2: Checking Integration SWITCH (W/O Lexus Navigation System)
    G03487525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C4 switch connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (C4-1) - O - W-B +B (+B) power supply Constant 10 to 14 V
    GND (C4-7)
    MPX+ (C4-5) - L - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX- (C4-12) - GR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (C4-7) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  3. CHECK NETWORK GATEWAY ECU (W/ LEXUS NAVIGATION SYSTEM) 
    Fig 3: Checking Network Gateway ECU (W/ Lexus Navigation System)
    G03487526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G3 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BATT (G3-8) - O - W-B +B (BATT) power supply Constant 10 to 14 V
    GND (G3-14)
    MPD1 (G3-4) - L - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPD2- (G3-11) - GR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    CG (G3-7) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  4. CHECK ECM 
    Fig 4: Checking ECM
    G03487527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E5, E6 and E7 ECM connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BATT (E5-3) - B - BR +B (BATT) power supply Constant 10 to 14 V
    E1 (E8-1)
    IGSW (E5-9) - G - BR Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    E1 (E8-1)
    +B (E5-1) - L-B - BR +B (+B) power supply Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    E1 (E8-1)
    +B2 (E5-2) - L-B - BR +B (+B2) power supply Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    E1 (E8-1)
    MPX1 (E6-18) - R - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX2 (E6-29) - O - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    E1 (E7-1) - BR - Body ground Ground Constant Below 1 Ω
    Body ground
    ME01 (E7-4) - W-B - Body grand Ground Constant Below 1 Ω
    Body ground

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

  5. CHECK TRANSPONDER KEY ECU ASSY 
    Fig 5: Checking Transponder Key ECU Assy
    G03487528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T9 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (T9-1) - V - W-B +B (CPUB) power supply Constant 10 to 14 V
    GND (T8-14)
    MPX1 (T9-4) - O - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX2 (T9-5) - R - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (T9-14) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  6. CHECK MULTIPLEX TILT & TELESCOPIC ECU 
    Fig 6: Checking Multiplex Tilt & Telescopic ECU
    G03487529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T4 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      TERMINAL DESCRIPTION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (T4-2) - Y - W-B +B (+B) power supply Constant 10 to 14 V
      GND (T4-11)
      ECUB (T4-9) - SB - W-B +B (ECUB) power supply Constant 10 to 14 V
      GND (T4-11)
      MPX1 (T4-5) - GR - Body ground MPX line Constant 10 kΩ or higher
      Body ground
      MPX2 (T4-14) - O - Body ground MPX line Constant 10 kΩ or higher
      Body ground
      GND (T4-11) - W-B - Body ground Ground Constant Below 1 Ω
      Body ground

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

  7. CHECK A/C AMPLIFIER (A/C ECU) 
    Fig 7: Checking A/C Amplifier (A/C ECU)
    G03487530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A8 amplifier connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (A8-2) - SB - W-B +B (+B) power supply Constant 10 to 14 V
    GND (A11-6)
    MPX+ (A8-3) - BR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX- (A8-4) - Body ground GR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (A8-6) - W-B - Body ground Ground Constant 10 kΩ or higher
    Body ground

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

  8. CHECK OUTER MIRROR CONTROL ECU ASSY (PASSENGER SIDE) 
    Fig 8: Checking Outer Mirror Control ECU Assy (Passenger Side)
    G03487531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R22 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R22-7) - L-B - W-B +B (CPUB) power supply Constant 10 to 14 V
    GND (R18-1)
    BDR (R22-3) - G - W-B +B (BDR) power supply Constant 10 to 14 V
    GND (R18-1)
    MPX1 (R22-6) - L - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (R22-1) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  9. CHECK OUTER MIRROR CONTROL ECU ASSY (DRIVER SIDE) 
    Fig 9: Checking Outer Mirror Control ECU Assy (Driver Side)
    G03487532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R21 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R21-7) - L-B - W-B +B (CPUB) power supply Constant 10 to 14 V
    GND (R17-1)
    BDR (R21-3) - G - W-B +B (BDR) power supply Constant 10 to 14 V
    GND (R17-1)
    MPX1 (R21-6) - R - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (R21-1) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  10. CHECK WINDSHIELD WIPER RELAY ASSY (WIPER ECU) 
    Fig 10: Checking Windshield Wiper Relay Assy (Wiper ECU)
    G03487533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A28 relay connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (A28-8) - SB - W-B +B (+B) power supply Constant 10 to 14 V
    E (A28-12)
    MPX1 (A28-1) - BR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    E (A28-12) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  11. CHECK TELEPHONE ECU 
    Fig 11: Checking Telephone ECU
    G03487534Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M8 and M9 ECU connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (M8-5) - SB - W-B +B (+B) power supply Constant 10 to 14 V
    GND (M8-7)
    MPX+ (M9-8) - O - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (M8-7) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  12. CHECK POSITION CONTROL ECU & SWITCH (POWER SEAT ECU) 
    Fig 12: Checking Position Control ECU & Switch (Power Seat ECU)
    G03487535Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P32 and P33 ECU connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (P33-5) - LG - W-B +B (+B) power supply Constant 10 to 14 V
    GND (P33-1)
    SYSB (P32-8) - GR - W-B +B (SYSB) power supply Constant 10 to 14 V
    GND (P33-1)
    IG (P32-4) - Y - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    GND (P33-1)
    MPX1 (P32-1) - W - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (P33-1) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  13. CHECK MULTIPLEX NETWORK DOOR ECU BACK (BACK DOOR ECU) 
    Fig 13: Checking Multiplex Network Door ECU Back (Back Door ECU)
    G03487536Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P13 and P14 ECU connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (P14-2) Y - W-B +B (+B) power supply Constant 10 to 14 V
    - GND (P14-8)
    ECUB (P13-10) - BR - W-B +B (ECUB) power supply Constant 10 to 14 V
    GND (P14-8)
    IG (P13-9) - GR - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    GND (P14-8)
    MPX1 (P13-22) - SB - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (P14-8 W-B - Body ground Ground Constant Below 1 Ω
    ) - Body ground

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

  14. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    Fig 14: Checking Power Window Regulator Master Switch Assy
    G03487537Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P22 switch connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      TERMINAL DESCRIPTION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BDR (P22-10) - G - W-B +B (BDR) power supply Constant 10 to 14 V
      GND (P22-2)
      CPUB (P22-9) - L-B - W-B +B (CPUB) power supply Constant 10 to 14 V
      GND (P22-2)
      MPX1 (P22-7) - R - Body ground MPX line Constant 10 kΩ or higher
      Body ground
      MPX2 (P22-8) - GR - Body ground MPX line Constant 10 kΩ or higher
      Body ground
      GND (P22-2) - W-B - Body ground Ground Constant Below 1 Ω
      Body ground

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

  15. CHECK COMBINATION METER ASSY 
    Fig 15: Checking Combination Meter Assy
    G03487538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C8 and C9 meter connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (C8-15) - SB - W-B +B (B) power supply Constant 10 to 14 V
    GND (C8-1)
    ECUB (C8-16) - O - W-B +B (ECUB) power supply Constant 10 to 14 V
    GND (C8-1)
    MPX+ (C8-5) - V - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX- (C9-4) - V - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    GND (C8-1) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  16. CHECK AIRBAG SENSOR ASSY (AIRBAG ECU) 
    Fig 16: Checking Airbag Sensor Assy (Airbag ECU)
    G03487539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A20 sensor connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IG2 (A20-5) - B - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    E1 (A20-27)
    MPX1 (A20-24) - BR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    MPX2 (A20-22) - BR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    E1 (A20-27) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground
    E2 (A20-28) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  17. CHECK SLIDING ROOF DRIVE GEAR ASSY (SLIDING ROOF ECU (STANDARD TYPE)) 
    Fig 17: Checking Sliding Roof Drive Gear Assy (Sliding Roof ECU (Standard Type))
    G03487540Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M12 gear connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (M12-1) - P - W-B +B (B) power supply Constant 10 to 14 V
    E (M12-7)
    ECUB (M12-5) - SB - W-B +B (ECUB) power supply Constant 10 to 14 V
    E (M12-7)
    MPX1 (M12-10) - BR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    E (M12-7) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  18. CHECK SLIDING ROOF DRIVE GEAR ASSY (SLIDING ROOF ECU (MULTI-PANEL MOON ROOF TYPE)) 
    Fig 18: Checking Sliding Roof Drive Gear Assy
    G03487541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M12 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (M12-4) - P - W-B +B (B) power supply Constant 10 to 14 V
    E (M12-8)
    ECUB (M12-10) - SB - W-B +B (ECUB) power supply Constant 10 to 14 V
    E (M12-8)
    MPX1 (M12-5) - BR - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    E (M12-8) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

  19. CHECK RAIN SENSOR 
    Fig 19: Checking Rain Sensor
    G03487542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R7 sensor connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      TERMINAL DESCRIPTION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (R7-1) - P - W-B +B (SIG) power supply Constant 10 to 14 V
      ES (R7-3)
      MPX1 (R7-2) - V - Body ground MPX line Constant 10 kΩ or higher
      Body ground
      ES (R7-3) - W-B - Body ground Ground Constant Below 1 Ω
      Body ground

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

  20. CHECK HEADLAMP SWIVEL ECU (AFS ECU) 
    Fig 20: Checking Headlamp Swivel ECU (AFS ECU)
    G03487543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A14 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard: 

    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IGS (A14-12) - P - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    E1 (A14-1)
    IG (A14-2) - P - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    E1 (A14-1)
    MPX1 (A14-5) - W - Body ground MPX line Constant 10 kΩ or higher
    Body ground
    E1S (A14-11) - W-B - Body ground Ground Constant Below 1 Ω
    Body ground

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

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