2007 Lexus GX 470FACTORY OEM SERVICE PROCEDURE

Terminals Of Ecu

  1. POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY 
    Fig 1: Identifying Power Window Regulator Master Switch Connector Terminals
    G05266726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D18 switch connector.
    2. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    VOLTAGE SPECIFICATION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    E (D18-2) - Body ground W-B - Body ground Ground Always Below 1V
    BDR1 (D18-10) - Body ground B-W - Body ground Battery power supply Always 10 to 14 V
    CPUB (D18-9) - Body ground L - Body ground Battery power supply Always 10 to 14 V
    SIG (D18-20) - Body ground W - Body ground Ignition power supply Ignition switch on (IG) 10 to 14 V

    Standard voltage 

    VOLTAGE SPECIFICATION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    U (D18-1) - E (D18-2) L - W-B Driver door power window motor UP output Ignition switch on (IG), drive power window switch OFF Below 1 V
    U (D18-1) - E (D18-2) L - W-B Driver door power window motor UP output Ignition switch on (IG), drive power window switch UP (manual operation) 10 to 14 V
    U (D18-1) - E (D18-2) L - W-B Driver door power window motor UP output Ignition switch on (IG), drive power window fully open Below 1 V
    U (D18-1) - E (D18-2) L - W-B Driver door power window motor UP output Ignition switch on (IG), drive power window switch UP (AUTO operation) 10 to 14 V
    U (D18-1) - E (D18-2) L - W-B Driver door power window motor UP output Ignition switch on (IG), drive power window fully closed Below 1 V
    D (D18-11) - E (D18-2) L-B - W-B Driver door power window motor DOWN output Ignition switch on (IG), drive power window switch DOWN (manual operation) 10 to 14 V
    D (D18-11) - E (D18-2) L-B - W-B Driver door power window motor DOWN output Ignition switch on (IG), drive power window fully closed Below 1 V
    D (D18-11) - E (D18-2) L-B - W-B Driver door power window motor DOWN output Ignition switch on (IG), drive power window switch DOWN (AUTO operation) 10 to 14 V
    D (D18-11) - E (D18-2) L-B - W-B Driver door power window motor DOWN output Ignition switch on (IG), drive power window fully open Below 1 V
    VCC (D18-19) - SGND (D18-12) W-R - W-B
    • Driver door power window motor sensor power source
    • Driver door power window motor sensor ground
    		 Always 10 to 14 V
    LSWD (D18-16) - E (D18-2) W-L - W-B Window lock switch output Driver door lock position ON 10 to 14 V
    Driver door lock position OFF Below 1 V
  2. CHECK POWER WINDOW REGULATOR SWITCH ASSEMBLY (FRONT RH) 
    Fig 2: Identifying Power Window Regulator Switch Connector Terminals (Front RH)
    G05266727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P7 switch connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BDR (P7-12) - Body ground B-R - Body ground Power supply Ignition switch on (IG) 10 to 14 V

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

    3. Reconnect the P7 switch connector and reset the power window motor.
    4. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    VOLTAGE SPECIFICATION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    UP (P7-6) - Body ground L - Body ground Power window motor UP output Ignition switch on (IG), front passenger side power window switch OFF → UP (Manual operation) 0 → 10 to 14 V
    DN (P7-1) - Body ground L-B - Body ground Power window motor DOWN output Ignition switch on (IG), front passenger side power window switch OFF → DOWN (Manual operation) 0 → 10 to 14 V

    If the result is not as specified, the power window regulator switch assembly may have a malfunction.

  3. CHECK POWER WINDOW REGULATOR SWITCH ASSEMBLY (REAR LH) 
    Fig 3: Identifying Power Window Regulator Switch Connector Terminals (Rear LH)
    G05266728Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P8 switch connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BDR (P8-12) - Body ground G-Y - Body ground Power supply Ignition switch on (IG) 10 to 14 V

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

    3. Reconnect the P8 switch connector and reset the power window motor.
    4. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    VOLTAGE SPECIFICATION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    UP (P8-6) - Body ground L - Body ground Power window motor UP output Ignition switch on (IG), front passenger side power window switch OFF → UP (Manual operation) 0 → 10 to 14 V
    DN (P8-1) - Body ground L-B - Body ground Power window motor DOWN output Ignition switch on (IG), front passenger side power window switch OFF → DOWN (Manual operation) 0 → 10 to 14 V

    If the result is not as specified, the power window regulator switch assembly may have a malfunction.

  4. CHECK POWER WINDOW REGULATOR SWITCH 
    Fig 4: Identifying Power Window Regulator Switch Connector Terminals
    G05266729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P9 switch connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BDR (P9-12) - Body ground G - Body ground Power supply Ignition switch on (IG) 10 to 14 V

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

    3. Reconnect the P9 switch connector and reset the power window motor.
    4. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    VOLTAGE SPECIFICATION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    UP (P9-6) - Body ground L - Body ground Power window motor UP output Ignition switch on (IG), front passenger side power window switch OFF → UP (Manual operation) 0 → 10 to 14 V
    DN (P9-1) - Body ground L-B - Body ground Power window motor DOWN output Ignition switch on (IG), front passenger side power window switch OFF → DOWN (Manual operation) 0 → 10 to 14 V

    If the result is not as specified, the power window regulator switch assembly may have a malfunction.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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