2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Terminals Of Ecu

  1. CHECK MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER DOOR ECU) 
    Fig 1: Identifying D17 And D19 ECU Connector Terminals
    G05293413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D17 and D19 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      ECU CONNECTOR TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (D19-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (D19-4) - Body ground L-O - Body ground +B power supply Always 10 to 14 V
      SIG (D19-5) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V
      BDR (D19-6) - Body ground B-R - Body ground +B power supply Always 10 to 14 V
      CTY (D17-27) - Body ground R-W - Body ground Driver side courtesy switch input Driver side door closed 10 kΩ or higher
      CTY (D17-27) - Body ground R-W - Body ground Driver side courtesy switch input Driver side door open Below 1 Ω
      PWE (D17-29) - Body ground Y - Body ground Power window master switch ground Always Below 1 Ω
      PWS (D17-21) - Body ground V-W - Body ground Power window master switch supply Ignition switch ON or key off operation 10 to 14 V
      MUP (D17-23) - Body ground P-L - Body ground Driver side power window MANUAL UP input Driver side power window switch OFF 10 kΩ or higher
      MUP (D17-23) - Body ground P-L - Body ground Driver side power window MANUAL UP input Driver side power window switch UP Below 1 Ω
      MDN (D17-25) - Body ground V - Body ground Driver side power window MANUAL DOWN input Driver side power window switch OFF 10 kΩ or higher
      MDN (D17-25) - Body ground V - Body ground Driver side power window MANUAL DOWN input Driver side power window switch DOWN Below 1 Ω
      AUTO (D17-2) - Body ground W-G - Body ground Driver side power window AUTO UP / DOWN input Driver side power window switch UP or DOWN 10 kΩ or higher
      AUTO (D17-2) - Body ground W-G - Body ground Driver side power window AUTO UP / DOWN input Driver side power window switch AUTO UP or AUTO DOWN Below 1 Ω
      SGND (D19-11) - Body ground BR - Body ground Ground Always Below 1 Ω
      LMT (D19-10) - SGND (D19-11) B-W - BR Power window limit switch input Power window fully closed 10 kΩ or higher
      LMT (D19-10) - SGND (D19-11) B-W - BR Power window limit switch input Power window fully opened Below 1 Ω
      PLS (D19-21) - SGND (D19-11) W - BR Power window pulse sensor input Power window operating Pulse generation
      WLS1 (D17-20) - Body ground Y-B - Body ground Power window lock switch output Ignition switch ON, window lock switch LOCK Below 1 Ω
      WLS1 (D17-20) - Body ground Y-B - Body ground Power window lock switch output Ignition switch ON, window lock switch UNLOCK 10 kΩ or higher
      WLSW (D17-9) - Body ground R - Body ground Power window lock switch input Ignition switch ON, window lock switch LOCK Below 1 Ω
      WLSW (D17-9) - Body ground R - Body ground Power window lock switch input Ignition switch ON, window lock switch UNLOCK 10 kΩ or higher
      DT1 (D17-5) - SC1 (D17-16) G-R - L-R Passenger door window remote UP input Passenger side power window using power window master switch OFF 10 kΩ or higher
      DT1 (D17-5) - SC1 (D17-16) G-R - L-R Passenger door window remote UP input Passenger side power window using power window master switch DOWN Below 1 Ω
      DT1 (D17-5) - SC2 (D17-15) G-R - Y-R Passenger door window remote DOWN input Passenger side power window using power window master switch OFF 10 kΩ or higher
      DT1 (D17-5) - SC2 (D17-15) G-R - Y-R Passenger door window remote DOWN input Passenger side power window using power window master switch UP Below 1 Ω
      DT1 (D17-5) - SC3 (D17-14) G-R - L Passenger door window remote AUTO UP / DOWN input Passenger side power window using power window master switch UP or DOWN 10 kΩ or higher
      DT1 (D17-5) - SC3 (D17-14) G-R - L Passenger door window remote AUTO UP / DOWN input Passenger side power window using power window master switch AUTO UP or AUTO DOWN Below 1 Ω

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

    3. Reconnect the D17 and D19 ECU connectors.
    4. Check the voltage of the connector.
      ECU CONNECTOR TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      DN (D19-2) - Body ground G - Body ground Driver door power window motor UP input Ignition switch ON, driver side window switch OFF Below 1 V
      DN (D19-2) - Body ground G - Body ground Driver door power window motor UP input Ignition switch ON, driver side window switch DOWN 10 to 14 V
      UP (D19-3) - Body ground L - Body ground Driver door power window motor UP input Ignition switch ON, driver side window switch OFF Below 1 V
      UP (D19-3) - Body ground L - Body ground Driver door power window motor UP input Ignition switch ON, driver side window switch UP 10 to 14 V

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

  2. CHECK MULTIPLEX NETWORK DOOR ECU FRONT RH (PASSENGER DOOR ECU) 
    Fig 2: Identifying P9 And P11 ECU Connector Terminals
    G05293414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P9 and P11 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      ECU CONNECTOR TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (P11-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (P11-4) - Body ground L-O - Body ground +B power supply Always 10 to 14 V
      SIG (P11-5) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V
      BDR (P11-6) - Body ground G-Y - Body ground +B power supply Always 10 to 14 V
      CTY (P9-27) - Body ground R-W - Body ground Passenger side courtesy switch input Passenger side door closed 10 kΩ or higher
      CTY (P9-27) - Body ground R-W - Body ground Passenger side courtesy switch input Passenger side door open Below 1 Ω
      PWE (P9-29) - Body ground Y - Body ground Power window regulator switch ground Always Below 1 Ω
      PLS (P9-21) - SGND (P11-11) W - BR Power window pulse sensor input Power window operating Pulse generation
      MUP (P9-23) - Body ground B-W - Body ground Passenger side power window MANUAL UP input Passenger side regulator switch OFF 10 kΩ or higher
      MUP (P9-23) - Body ground B-W - Body ground Passenger side power window MANUAL UP input Passenger side regulator switch UP Below 1 Ω
      MDN (P9-25) - Body ground V - Body ground Passenger side power window MANUAL DOWN input Passenger side regulator switch OFF 10 kΩ or higher
      MDN (P9-25) - Body ground V - Body ground Passenger side power window MANUAL DOWN input Passenger side regulator switch DOWN Below 1 Ω
      AUTO (P9-2) - Body ground W-G - Body ground Passenger side power window AUTO UP / DOWN input Passenger side regulator switch UP or DOWN 10 kΩ or higher
      AUTO (P9-2) - Body ground W-G - Body ground Passenger side power window AUTO UP / DOWN input Passenger side regulator switch AUTO UP or AUTO DOWN Below 1 Ω
      SGND (P11-11) - Body ground BR - Body ground Ground Always Below 1 Ω
      LMT (P11-10) - SGND (P11-11) B-W - BR Power window limit switch input Power window fully closed 10 kΩ or higher
      LMT (P11-10) - SGND (P11-11) B-W - BR Power window limit switch input Power window fully opened Below 1 Ω
      WLS1 (P9-20) - Body ground L-R - Body ground Power window lock switch output Ignition switch ON, window lock switch LOCK Below 1 Ω
      WLS1 (P9-20) - Body ground L-R - Body ground Power window lock switch output Ignition switch ON, window lock switch UNLOCK 10 kΩ or higher
      WLSW (P9-9) - Body ground Y-B - Body ground Power window lock switch input Ignition switch ON, window lock switch LOCK Below 1 Ω
      WLSW (P9-9) - Body ground Y-B - Body ground Power window lock switch input Ignition switch ON, window lock switch UNLOCK 10 kΩ or higher

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

    3. Reconnect the P9 and P11 ECU connectors.
    4. Measure the voltage of the connector.
      ECU CONNECTOR TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      DN (D19-2) - Body ground G - Body ground Passenger door power window motor DOWN input Ignition switch ON, passenger side regulator switch OFF Below 1 V
      DN (D19-2) - Body ground G - Body ground Passenger door power window motor DOWN input Ignition switch ON, passenger side regulator switch DOWN 10 to 14 V
      UP (D19-3) - Body ground L - Body ground Passenger door power window motor UP input Ignition switch ON, passenger side regulator switch OFF Below 1 V
      UP (D19-3) - Body ground L - Body ground Passenger door power window motor UP input Ignition switch ON, passenger side regulator switch UP 10 to 14 V

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

  3. CHECK THEFT WARNING ECU ASSEMBLY 
    Fig 3: Identifying T7 Theft Warning ECU Assembly Connector Terminals
    G05293415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T7 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      ECU CONNECTOR TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (T7-24) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V
      +B (T7-1) - Body ground L-W - Body ground +B power supply Always 10 to 14 V
      +B2(T7-21)-Body ground B-O - Body ground +B2 power supply Always 10 to 14 V
      GND (T7-20) - 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.

  4. CHECK TRANSPONDER KEY ECU ASSEMBLY 
    Fig 4: Identifying T13 Transponder Key ECU Assembly Connector Terminals
    G05293416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T13 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      ECU CONNECTOR TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (T13-13) - Body ground V - Body ground Ground Always Below 1 Ω
      CPUB (T13-1) - GND (T13-14) L-B - W-B Battery Always 10 to 14 V
      IG2 (T13-2) - AGND (T13-13) B - V Ignition switch Ignition switch ON 10 to 14 V
      KSW (T13-3) - AGND (T13-13) LG-B - V Unlock warning switch No key in ignition key cylinder 10 kΩ or higher
      KSW (T13-3) - AGND (T13-13) LG-B - V Unlock warning switch Key inserted Below 1 Ω
    3. Reconnect the T13 ECU connector.
    4. Measure the voltage of the connector.
      ECU CONNECTOR TERMINAL SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      VC12 (T13-9) - AGND (T13-13) Y - V Power source Ignition switch ON 4.6 to 5.4 V

      If the result is not as specified, the ECU 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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