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Terminals Of Ecu

  1. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (with Jam Protection) 
    Fig 1: Identifying Terminals Of P9 ECU Connector
    G04867139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P9 switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      TERMINALS DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (P9-10) - Body ground B - Body ground +B power supply Always 10 to 14 V
      IG (P9-20) - Body ground R - Body ground Ignition power supply Ignition switch OFF Below 1 V
      IG (P9-20) - Body ground R - Body ground Ignition power supply Ignition switch ON 10 to 14 V
      GND (P9-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L (P9-4) - Body ground R - Body ground Door control switch door lock input Door control switch OFF 10 kΩ or higher
      L (P9-4) - Body ground R - Body ground Door control switch door lock input Door control switch LOCK Below 1 Ω
      U (P9-14) - Body ground P - Body ground Door control switch door unlock input Door control switch OFF 10 kΩ or higher
      U (P9-14) - Body ground P - Body ground Door control switch door unlock input Door control switch UNLOCK Below 1 Ω

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

      HINT:

      After disconnecting the P9 switch connector, be sure to reconnect it and then reset the power window motor (See INITIALIZATION ).

  2. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (without Jam Protection) 
    Fig 2: Identifying P17 Power Window Regulator Master Switch Connector Terminals
    G04867140Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P17 switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY TERMINALS DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (P17-3) - Body ground G - Body ground IG power supply IG switch ON 10 to 14 V
      E (P17-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L (P17-2) -Body ground R - Body ground Door control switch door lock input Door control switch OFF 10 kΩ or higher
      L(P17-2) - Body ground R - Body ground Door control switch door lock input Door control switch LOCK Below 1 Ω
      U (P17-7) - Body ground P - Body ground Door control switch door unlock input Door control switch OFF 10 kΩ or higher
      U(P17-7)- Body ground P - Body ground Door control switch door unlock input Door control switch UNLOCK Below 1 Ω

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

  3. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (INTEGRATION RELAY) 
    Fig 3: Identifying Instrument Panel Junction Block Assembly
    G04867141Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 1A, 1B, 1E, 1G and 1H junction block connectors.
    2. Disconnect the 16 relay connector.
    3. Measure the voltage and resistance of the wire harness side connectors.
      INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY TERMINALS DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ALTB(1G-1) - Body ground W - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      ECUB (1B-30) - Body ground V - Body ground +B (ECUB) power supply Always 10 to 14 V
      GND (1E-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
      KSW (1E-26) - Body ground B - Body ground Key unlock warning switch input No key in ignition key cylinder 10 kΩ or higher
      KSW (1E-26) - Body ground B - Body ground Key unlock warning switch input Key inserted Below 1 Ω
      L1 (1H-13) - Body ground GR - Body ground Driver side door control switch lock input Driver side door control switch OFF 10 kΩ or higher
      L1 (1H-13) - Body ground GR - Body ground Driver side door control switch lock input Driver side door control switch LOCK Below 1 Ω
      UL1 (1H-14) - Body ground V - Body ground Driver side door control switch unlock input Driver side door control switch OFF 10 kΩ or higher
      UL1 (1H-14) - Body ground V - Body ground Driver side door control switch unlock input Driver side door control switch UNLOCK Below 1 Ω
      L1 (1H-4) - Body ground L - Body ground Passenger side door control switch lock input Passenger side door control switch OFF 10 kΩ or higher
      L1 (1H-4) - Body ground L - Body ground Passenger side door control switch lock input Passenger side door control switch LOCK Below 1 Ω
      UL1 (1H-5) - Body ground B - Body ground Passenger side door control switch unlock input Passenger side door control switch OFF 10 kΩ or higher
      UL1 (1H-5) - Body ground B - Body ground Passenger side door control switch unlock input Passenger side door control switch UNLOCK Below 1 Ω
      L2 (1H-16) - Body ground L - Body ground Driver side door key-linked door lock input Driver side door key cylinder OFF 10 kΩ or higher
      L2 (1H-16)- Body ground L - Body ground Driver side door key-linked door lock input Driver side door key cylinder LOCK Below 1 Ω
      UL3 (I6-18) - Body ground P - Body ground Driver side door key-linked door unlock input Driver side door key cylinder OFF 10 kΩ or higher
      UL3 (I6-18) - Body ground P - Body ground Driver side door key-linked door unlock input Driver side door key cylinder UNLOCK Below 1 Ω
      LSWD (I6-20) - Body ground W - Body ground Driver side door lock position switch input Driver side door UNLOCK 10 kΩ or higher
      LSWD (I6-20) - Body ground W - Body ground Driver side door lock position switch input Driver side door LOCK Below 1 Ω
      L2 (1H-7) - Body ground ((1)) O - Body ground Passenger side door key-linked door lock input Passenger side door key cylinder OFF 10 kΩ or higher
      L2 (1H-7) - Body ground ((1)) 0 - Body ground Passenger side door key-linked door lock input Passenger side door key cylinder LOCK Below 1 Ω
      UL2 (1H-6) - Body ground LG - Body ground Passenger side door key-linked door unlock input Passenger side door key cylinder OFF 10 kΩ or higher
      UL2 (1H-6) - Body ground (M) LG - Body ground Passenger side door key-linked door unlock input Passenger side door key cylinder UNLOCK Below 1 Ω
      DCTY (1A-21) - Body ground O - Body ground Driver side courtesy switch input Driver side door closed 10 kΩ or higher
      DCTY (1A-21) - Body ground 0 - Body ground Driver side courtesy switch input Driver side door open Below 1 Ω
      BCTY (1A-7) - Body ground V - Body ground Back door courtesy switch input Back door closed 10 kΩ or higher
      BCTY (1A-7) - Body ground V - Body ground Back door courtesy switch input Back door open Below 1 Ω
      BDSU (I6-19) - Body ground O - Body ground Back door opener switch input Back door opener switch OFF 10 kΩ or higher
      BDSU (I6-19) - Body ground O - Body ground Back door opener switch input Back door opener switch ON Below 1 Ω
      SPD (16-11) - Body ground V - Body ground Vehicle speed signal Ignition switch on, rotate front wheel slowly Pulse generation (See waveform 1)
      (1) with Jam Protection

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

    4. Using an oscilloscope, check the signal waveform of the ECU.
      1. Waveform 1

        Waveform 1 (Reference): 

        WAVEFORM 1 REFERENCE CHART

        Terminal No. SPD (I6-11) - Body ground
        Tool Setting 5V/DIV., 10ms./DIV.
        Vehicle Condition Driving at approx. 20 km/h (12 mph)

        HINT:

        As the vehicle speed increases, the wavelength shortens.

        Fig 4: Identifying Waveform 1
        G04867142Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Reconnect the 1A, 16, 1E, 1G and 1H junction block connectors.
    6. Reconnect the 16 relay connector.
    7. Measure the voltage of the connectors.
      INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY TERMINALS DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ACT+ (1H-8) - Body ground BR - Body ground Door lock motor LOCK drive output (driver and passenger doors) Drivers' door control switch OFF Below 1 V
      Drivers' door control switch LOCK 10 to 14 V
      Drivers' door key cylinder OFF Below 1 V
      Drivers' door key cylinder LOCK 10 to 14 V
      Passengers' door control switch OFF Below 1 V
      Passengers' door control switch LOCK 10 to 14 V
      Passengers' door key cylinder OFF Below 1 V
      Passengers' door key cylinder LOCK 10 to 14 V
      ACT+ (1H-17) - Body ground R - Body ground Door lock motor LOCK drive output (driver and passenger doors) Drivers' door control switch OFF Below 1 V
      Drivers' door control switch LOCK 10 to 14 V
      Drivers' door key cylinder OFF Below 1 V
      Drivers' door key cylinder LOCK 10 to 14 V
      Passengers' door control switch OFF Below 1 V
      Passengers' door control switch LOCK 10 to 14 V
      Passengers' door key cylinder OFF Below 1 V
      Passengers' door key cylinder LOCK 10 to 14 V
      ACTD (I6-2) - Body ground L - Body ground Door lock motor UNLOCK drive output (driver door) Drivers' door control switch OFF Below 1 V
      Drivers' door control switch UNLOCK 10 to 14 V
      Drivers' door key cylinder OFF Below 1 V
      Drivers' door key cylinder UNLOCK 10 to 14 V
      Passengers' door control switch OFF Below 1 V
      Passengers' door control switch UNLOCK 10 to 14 V
      Passengers' door key cylinder OFF Below 1 V
      Passengers' door key cylinder UNLOCK 10 to 14 V
      ACT- (1H-9)- Body ground W - Body ground Door lock motor UNLOCK drive output (passenger door) Drivers' door control switch OFF Below 1 V
      Drivers' door control switch UNLOCK 10 to 14 V
      Drivers' door key cylinder OFF Below 1 V
      Drivers' door key cylinder UNLOCK 10 to 14 V
      Passengers' door control switch OFF Below 1 V
      Passengers' door control switch UNLOCK 10 to 14 V
      Passengers' door key cylinder OFF Below 1 V
      Passengers' door key cylinder UNLOCK 10 to 14 V
      BACT (I6-1) - Body ground LG - Body ground Back door lock motor OPEN drive output Door control switch UNLOCK, back door opener switch OFF Below 1 V
      Door control switch UNLOCK, back door opener switch ON 10 to 14 V
      BACT (I6-1) - Body ground LG - Body ground Back door lock motor OPEN drive output Door control switch LOCK, back door opener switch OFF Below 1 V
      Door control switch LOCK, back door opener switch ON Below 1 V

      If the result is not as specified, the junction block (integration relay) may have a malfunction.

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