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Terminals Of Ecu

  1. CHECK POWER WINDOW REGULATOR MASTER SWITCH 
    Fig 1: Identifying ECU Terminals
    G04476730Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P17 switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      ECU TERMINALS VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E (P17-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      BW (P17-7) - E (P17-1) W - W-B Regulator motor power supply Always 10 to 14 V
      B (P17-6) - E (P17-1) L - W-B Master switch power supply Power switch ON (IG) 10 to 14 V
      BDR (P17-11) - E (P17-1) V - W-B Master switch power supply Power switch ON (IG) 10 to 14 V

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

    3. Reconnect the P17 switch connector.
    4. Reset the power window motor (see INITIALIZATION ).
    5. Measure the voltage of the connector.
      ECU TERMINALS VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      DU (P17-4) - E (P17-1) Y - W-B Power window motor UP output Power switch ON (IG), driver side power window switch OFF Below 1 V
      DU (P17-4) - E (P17-1) Y - W-B Power window motor UP output Power switch ON (IG), driver side power window switch UP (manual operation) 10 to 14 V
      DU (P17-4) - E (P17-1) Y - W-B Power window motor UP output Power switch ON (IG), driver side power window fully open Below 1 V
      DU (P17-4) - E (P17-1) Y - W-B Power window motor UP output Power switch ON (IG), driver side power window switch UP (AUTO operation) 10 to 14 V
      DU (P17-4) - E (P17-1) Y - W-B Power window motor UP output Power switch ON (IG), driver side power window fully closed Below 1 V
      DD (P17-9) - E (P17-1) G - W-B Power window motor DOWN output Power switch ON (IG), driver side power window switch OFF Below 1 V
      DD (P17-9) - E (P17-1) G - W-B Power window motor DOWN output Power switch ON (IG), driver side power window switch DOWN (manual operation) 10 to 14 V
      DD (P17-9) - E (P17-1) G - W-B Power window motor DOWN output Power switch ON (IG), driver side power window fully closed Below 1 V
      DD (P17-9) - E (P17-1) G - W-B Power window motor DOWN output Power switch ON (IG), driver side power window switch DOWN (AUTO operation) 10 to 14 V
      DD (P17-9) - E (P17-1) G - W-B Power window motor DOWN output Power switch ON (IG), driver side power window fully open Below 1 V
      VCC (P17-3) - GND (P17-2) G - O
      • Power window motor power source
      • Power window motor sensor ground
      		 Always 10 to 14 V

      If the result is not as specified, the master switch may have a malfunction.

    6. Check the AUTO light illumination.
      1. When turning the power switch ON (IG), check that the AUTO light illuminates (green).
  2. CHECK DRIVER SIDE JUNCTION BLOCK (MAIN BODY ECU) 
    Fig 2: Identifying Driver Side Junction Block ECU Terminals
    G04476731Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 1A, 1D, 1E and 1B junction block connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      ECU TERMINALS RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ECUB (1A-30) - Body ground R - Body ground +B (ECUB) power supply Always 10 to 14 V
      ALTB (1B-1) - Body ground W - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      KSW (1E-26) - Body ground Y - Body ground Halfway switch input No key in key slot 10 kΩ or higher
      KSW (1E-26) - Body ground Y - Body ground Halfway switch input Key inserted Below 1 Ω
      DCTY (1D-21) - Body ground V - Body ground Driver side courtesy switch input Driver side door closed 10 kΩ or higher
      DCTY (1D-21) - Body ground V - Body ground Driver side courtesy switch input Driver side door open Below 1 Ω
      PCTY (1D-24) - Body ground P BR - Body ground Passenger side courtesy switch input Passenger side door closed 10 kΩ or higher
      PCTY (1D-24) - Body ground BR - Body ground Passenger side courtesy switch input Passenger side door open Below 1 Ω
      GND (1E-17) - Body ground W-B - Body ground 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 1A, 1D, 1E and 1B junction block connectors.
    4. Measure the voltage of the connector.
      TERMINALS VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      KSW (1E-26) - Body ground Y - Body ground Halfway switch input No key in key slot 10 to 14 V
      KSW (1E-26) - Body ground Y - Body ground Halfway switch input Key inserted Below 1 V

      If the result is not as specified, the junction block (main body ECU) may have a malfunction.

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