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Terminals Of Ecu

  1. POSITION CONTROL ECU AND SWITCH ASSEMBLY (POWER SEAT CONTROL SWITCH AND ECU) 
    1. Disconnect the P32 and P33 connectors.
      Fig 1: Identifying P32 And P33 Connectors Terminals
      G05274470Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage of each terminal of the wire harness side connectors.
      TERMINAL DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (P32-4) - GND (P33-1) Y-W-B Ignition switch Ignition switch off → ignition switch on Below 1 V → 10 to 14 V
      SYSB (P32-8) - GND (P33-1) GR - W-B Power source Always 10 to 14 V
      +B (P33-5) - GND (P33-1) LG - W-B Battery Always 10 to 14 V

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

    3. Check the resistance of each terminal of the wire harness side connectors.
      TERMINAL DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (P33-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    4. Reconnect the P32 and P33 connectors.
    5. Check the voltage of each terminal of the connectors.
      TERMINAL DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MPX1 (P32-1) - GND (P33-1) W - W-B Multiplex communication signal circuit Ignition switch on Pulse generation
      SLD+ (P33-2) - GND (P33-1) L - W-B Sliding motor signal (Forward) Seat moving forward using sliding switch → Other conditions 10 to 14 V → Below 1 V
      SLD- (P33-3) - GND (P33-1) Y - W-B Sliding motor signal (Rearward) Seat moving rearward using sliding switch → Other conditions 10 to 14 V → Below 1 V
      FRV- (P33-4) - GND (P33-1> B - W-B Front vertical motor signal (Downward) Seat cushion front portion lowering using front vertical switch → Other conditions 10 to 14 V → Below 1 V
      FRV+ (P33-6) - GND (P33-1) G - W-B Front vertical motor signal (Upward) Seat cushion front portion rising using front vertical switch → Other conditions 10 to 14 V → Below 1 V
      LFT+ (P33-7) - GND (P33-1) W - W-B Lifter motor signal (Upward) Seat rising using lifter switch → Other conditions 10 to 14 V → Below 1 V
      RCL+ (P33-8) - GND (P33-1) P - W-B Reclining motor signal (Forward) Seatback moving forward using reclining switch → Other conditions 10 to 14 V → Below 1 V
      LFT- (P33-9) - GND (P33-1) V - W-B Lifter motor signal (Downward) Seat lowering using lifter switch → Other conditions 10 to 14 V → Below 1 V
      RCL- (P33-10) - GND (P33-1) BR - W-B Reclining motor signal (Rearward) Seatback moving rearward using reclining switch → Other conditions 10 to 14 V → Below 1 V

      If the result is not as specified, the position control ECU and switch assembly may be malfunctioning.

  2. POWER WINDOW REGULATOR SWITCH ASSEMBLY (POWER WINDOW MASTER SWITCH) 
    1. Disconnect the P22 connector.
      Fig 2: Identifying P22 Connector Terminals
      G05281305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage of each terminal of the wire harness side connectors.
      TERMINAL DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (P22-9) - GND (P22-2) L-B - W-B Power source Always 10 to 14 V
      BDR (P22-10) - GND (P22-2) G - W-B Power window motor power source Always 10 to 14 V
      SIG (P22-20) - GND (P22-2) BR - W-B Ignition switch signal Ignition switch off → ignition switch on Below 1 V → 10 to 14 V

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

    3. Check the resistance of each terminal of the wire harness side connector.
      TERMINAL DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (P22-2) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    4. Reconnect the P22 connector.
    5. Check the voltage of each terminal of the connectors.
      TERMINAL DESCRIPTION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MM (P22-3) - GND (P22-2) LG - W-B SET switch signal SET switch is not pushed → pushed 10 to 14 V → Below 1 V
      M1 (P22-13) - GND (P22-2) G - W-B SW1 switch signal SW1 switch is not pushed → pushed 10 to 14 V → Below 1 V
      M2 (P22-17) - GND (P22-2) V - W-B SW2 switch signal SW2 switch is not pushed → pushed 10 to 14 V → Below 1 V

      If the result is not as specified, the power window regulator switch assembly may be malfunctioning.

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