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Terminals Of Ecu

  1. CHECK POSITION CONTROL ECU (for Driver Side) 
    1. Disconnect the P21 and P22 ECU connectors.
      Fig 1: Identifying P21 And P22 ECU Connectors
      G05293673Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connectors.
      POSITION CONTROL ECU (FOR DRIVER SIDE) VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (P21-8) - GND (P22-7) V-W - W-B Ignition switch signal Ignition switch OFF Below 1 V
      IG (P21-8) - GND (P22-7) V-W - W-B Ignition switch signal Ignition switch ON 10 to 14 V
      +B (P22-8) - GND (P22-7) L-W - W-B Battery Always 10 to 14 V
      SYSB (P21-9) - GND (P22-7) L-O - W-B Battery Always 10 to 14 V
      SGND (P21-13) - GND (P22-7) BR - W-B Ground Always Below 1 Ω
      GND (P22-7) - 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 P21 and P22 ECU connectors.
    4. Initialize the front power seat (see INITIALIZATION  ).
    5. Measure the voltage of the connectors.
      POSITION CONTROL ECU (FOR DRIVER SIDE) VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SLD+ (P22-4) - GND (P22-7) B - W-B Sliding motor signal (forward) Slide switch FRONT OFF Below 1 V
      SLD+ (P22-4) - GND (P22-7) B - W-B Sliding motor signal (forward) Slide switch ON 10 to 14 V
      SLD- (P22-3) - GND (P22-7) B-R - W-B Sliding motor signal (rearward) Slide switch REAR OFF Below 1 V
      SLD- (P22-3) - GND (P22-7) B-R - W-B Sliding motor signal (rearward) Slide switch ON 10 to 14 V
      FRV+ (P22-10) - GND (P22-7) W-R - W-B Front vertical motor signal (upward) Front vertical switch UP OFF Below 1 V
      FRV+ (P22-10) - GND (P22-7) W-R - W-B Front vertical motor signal (upward) Front vertical switch ON 10 to 14 V
      FRV- (P22-9) - GND (P22-7) W-G - W-B Front vertical motor signal (downward) Front vertical switch DOWN OFF Below 1 V
      FRV- (P22-9) - GND (P22-7) W-G - W-B Front vertical motor signal (downward) Front vertical switch ON 10 to 14 V
      LFT+ (P22-6) - GND (P22-7) Y-G - W-B Lifter motor signal (upward) Lifter switch UP OFF Below 1 V
      LFT+ (P22-6) - GND (P22-7) Y-G - W-B Lifter motor signal (upward) Lifter switch ON 10 to 14 V
      LFT- (P22-5) - GND (P22-7) Y-R - W-B Lifter motor signal (downward) Lifter switch DOWN OFF Below 1 V
      LFT- (P22-5) - GND (P22-7) Y-R - W-B Lifter motor signal (downward) Lifter switch ON 10 to 14 V
      RCL+ (P22-2) - GND (P22-7) L-R - W-B Reclining motor signal (forward) Reclining switch FRONT OFF Below 1 V
      RCL+ (P22-2) - GND (P22-7) L-R - W-B Reclining motor signal (forward) Reclining switch ON 10 to 14 V
      RCL- (P22-1) - GND (P22-7) L - W-B Reclining motor signal (rearward) Reclining switch REAR OFF Below 1 V
      RCL- (P22-1) - GND (P22-7) L - W-B Reclining motor signal (rearward) Reclining switch ON 10 to 14 V
      SSRS (P21-14) - GND (P22-7) LG - W-B Slide direction position signal Slide operation Varies between 0 to 8 V
      SSFV (P21-3) - GND (P22-7) R - W-B Front vertical direction position signal Front vertical operation Varies between 0 to 8 V
      SSRV (P21-4) - GND (P22-7) GR - W-B Lifter position signal Lifter operation Varies between 0 to 8 V
      SSRR (P21-5) - GND (P22-7) P-B - W-B Reclining position signal Reclining operation Varies between 0 to 8 V
      PVCC (P21-6) - GND (P22-7) V - W-B Position sensor power supply Power seat operation 0 to 8V
      SLDF (P21-15) - GND (P22-7) L - W-B Slide switch signal (forward) Slide switch FRONT OFF 10 to 14 V
      SLDF (P21-15) - GND (P22-7) L - W-B Slide switch signal (forward) Slide switch ON Below 1 V
      SLDR (P21-16) - GND (P22-7) L-B - W-B Slide switch signal (rearward) Slide switch REAR OFF 10 to 14 V
      SLDR (P21-16) - GND (P22-7) L-B - W-B Slide switch signal (rearward) Slide switch ON Below 1 V
      FUP (P21-19) - GND (P22-7) L-Y - W-B Front vertical, switch (upward) Front vertical switch UP OFF 10 to 14 V
      FUP (P21-19) - GND (P22-7) L-Y - W-B Front vertical switch (upward) Front vertical switch ON Below 1 V
      FDWN (P21-7) - GND (P22-7) L-R - W-B Front vertical switch signal (downward) Front vertical switch DOWN OFF 10 to 14 V
      FDWN (P21-7) - GND (P22-7) L-R - W-B Front vertical switch signal (downward) Front vertical switch ON Below 1 V
      LUP (P21-17) - GND (P22-7) Y-G - W-B Lifter switch signal (upward) Lifter switch UP OFF 10 to 14 V
      LUP (P21-17) - GND (P22-7) Y-G - W-B Lifter switch signal (upward) Lifter switch ON Below 1 V
      LDWN (P21-18) - GND (P22-7) Y - W-B Lifter switch signal (downward) Lifter switch DOWN OFF 10 to 14 V
      LDWN (P21-18) - GND (P22-7) Y - W-B Lifter switch signal (downward) Lifter switch ON Below 1 V
      RCLF (P21-21) - GND (P22-7) Y-R - W-B Reclining switch signal (forward) Reclining switch FRONT OFF 10 to 14 V
      RCLF (P21-21) - GND (P22-7) Y-R - W-B Reclining switch signal (forward) Reclining switch ON Below 1 V
      RCLR (P21-22) - GND (P22-7) Y-B - W-B Reclining switch signal (rearward) Reclining switch REAR OFF 10 to 14 V
      RCLR (P21-22) - GND (P22-7) Y-B - W-B Reclining switch signal (rearward) Reclining switch ON Below 1 V

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

  2. CHECK POSITION CONTROL ECU (for Front Passenger Side) 
    1. Disconnect the P23 and P24 ECU connectors.
      Fig 2: Identifying P23 And P24 ECU Connectors
      G05293674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connectors.
      POSITION CONTROL ECU (FOR FRONT PASSENGER SIDE) VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (P24-8) - GND (P24-7) L-W - W-B Battery Always 10 to 14 V
      SYSB (P23-9) - GND (P24-7) L-O - W-B Battery Always 10 to 14 V
      SGND (P23-13) - GND (P24-7) W-B - W-B Ground Always Below 1 Ω
      GND (P24-7) - 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 P23 and P24 ECU connectors.
    4. Initialize the front power seat (see INITIALIZATION  ).
    5. Measure the voltage of the connectors.
      POSITION CONTROL ECU (FOR FRONT PASSENGER SIDE) VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SLD+ (P24-4) - GND (P24-7) B - W-B Sliding motor signal (forward) Slide switch FRONT OFF Below 1 V
      SLD+ (P24-4) - GND (P24-7) B - W-B Sliding motor signal (forward) Slide switch ON 10 to 14 V
      SLD- (P24-3) - GND (P24-7) B-R - W-B Sliding motor signal (rearward) Slide switch REAR OFF Below 1 V
      SLD- (P24-3) - GND (P24-7) B-R - W-B Sliding motor signal (rearward) Slide switch ON 10 to 14 V
      FRV+ (P24-10) - GND (P24-7) W-R - W-B Front vertical motor signal (upward) Front vertical switch UP OFF Below 1 V
      FRV+ (P24-10) - GND (P24-7) W-R - W-B Front vertical motor signal (upward) Front vertical switch ON 10 to 14 V
      FRV- (P24-9) - GND (P24-7) W-G - W-B Front vertical motor signal (downward) Front vertical switch DOWN OFF Below 1 V
      FRV- (P24-9) - GND (P24-7) W-G - W-B Front vertical motor signal (downward) Front vertical switch ON 10 to 14 V
      LFT+ (P24-6) - GND (P24-7) Y-G - W-B Lifter motor signal (upward) Lifter switch UP OFF Below 1 V
      LFT+ (P24-6) - GND (P24-7) Y-G - W-B Lifter motor signal (upward) Lifter switch ON 10 to 14'
      LFT- (P24-5) - GND (P24-7) Y-R - W-B Lifter motor signal (downward) Lifter switch DOWN OFF Below 1 V
      LFT- (P24-5) - GND (P24-7) Y-R - W-B Lifter motor signal (downward) Lifter switch ON 10 to 14 V
      RCL+ (P24-2) - GND (P24-7) L-R - W-B Reclining motor signal (forward) Reclining switch FRONT OFF Below 1 V
      RCL+ (P24-2) - GND (P24-7) L-R - W-B Reclining motor signal (forward) Reclining switch ON 10 to 14 V
      RCL- (P24-1) - GND (P24-7) L - W-B Reclining motor signal (rearward) Reclining switch REAR OFF Below 1 V
      RCL- (P24-1) - GND (P24-7) L - W-B Reclining motor signal (rearward) Reclining switch ON 10 to 14 V
      SSRS (P23-14) - GND (P24-7) LG - W-B Slide direction position signal Slide operation Varies between 0 to 8 V
      SSFV (P23-3) - GND (P24-7) R - W-B Front vertical direction position signal Front vertical operation Varies between 0 to 8 V
      SSRV (P23-4) - GND (P24-7) GR - W-B Lifter position signal Lifter operation Varies between 0 to 8 V
      SSRR (P23-5) - GND (P24-7) P-B - W-B Reclining position signal Reclining operation Varies between 0 to 8 V
      PVCC (P23-6) - GND (P24-7) V - W-B Position sensor power supply Power seat operation 0 to 8 V
      SLDF (P23-15) - GND (P24-7) L - W-B Slide switch signal (forward) Slide switch FRONT OFF 10 to 14 V
      SLDF (P23-15) - GND (P24-7) L - W-B Slide switch signal (forward) Slide switch ON Below 1 V
      SLDR (P23-16) - GND (P24-7) L-B - W-B Slide switch signal (rearward) Slide switch REAR OFF 10 to 14 V
      SLDR (P23-16) - GND (P24-7) L-B - W-B Slide switch signal (rearward) Slide switch ON Below 1 V
      FUP (P23-19) - GND (P24-7) L-Y - W-B Front vertical switch signal (upward) Front vertical switch UP OFF 10 to 14 V
      FUP (P23-19) - GND (P24-7) L-Y - W-B Front vertical switch signal (upward) Front vertical switch ON Below 1 V
      FDWN (P23-7) - GND (P24-7) L-R - W-B Front vertical switch signal (downward) Front vertical switch DOWN OFF 10 to 14 V
      FDWN (P23-7) - GND (P24-7) L-R - W-B Front vertical switch signal (downward) Front vertical switch ON Below 1 V
      LUP (P23-17) - GND (P24-7) Y-G - W-B Lifter switch signal (upward) Lifter switch UP OFF 10 to 14 V
      LUP (P23-17) - GND (P24-7) Y-G - W-B Lifter switch signal (upward) Lifter switch ON Below 1 V
      LDWN (P23-18) - GND (P24-7) Y - W-B Lifter switch signal (downward) Lifter switch DOWN OFF 10 to 14 V
      LDWN (P23-18) - GND (P24-7) Y - W-B Lifter switch signal (downward) Lifter switch ON Below 1 V
      RCLF (P23-21) - GND (P24-7) Y-R - W-B Reclining switch signal (forward) Reclining switch FRONT OFF 10 to 14 V
      RCLF (P23-21) - GND (P24-7) Y-R - W-B Reclining switch signal (forward) Reclining switch ON Below 1 V
      RCLR (P23-22) - GND (P24-7) Y-B - W-B Reclining switch signal (rearward) Reclining switch REAR OFF 10 to 14 V
      RCLR (P23-22) - GND (P24-7) Y-B - W-B Reclining switch signal (rearward) Reclining switch ON Below 1 V

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

  3. CHECK MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER DOOR ECU) 
    1. Disconnect the D19 ECU connector.
      Fig 3: Checking Multiplex Network Door ECU Front LH (Driver Door ECU)
      G05293675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connector.
      MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER DOOR ECU)VOLTAGE AND RESISTANCE SPECIFICATION

      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) - GND (D19-1) L-O - W-B Battery (ECU power source) Always 10 to 14 V
      SIG (D19-5) - GND (D19-1) V-W - W-B Ignition power supply Ignition switch OFF Below 1 V
      SIG (D19-5) - GND (D19-1) V-W - W-B Ignition power supply Ignition switch ON 10 to 14 V
      BDR (D19-6) - GND (D19-1) B-R - W-B Battery (ECU power source) Always 10 to 14 V

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

    3. Reconnect the D19 ECU connector.
    4. Measure the voltage of the connector.
      MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER DOOR ECU) VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MM (D18-24) - MSWE (D18-23) L - W-B Memory SET switch signal Seat memory SET switch OFF 10 to 14 V
      MM (D18-24) - MSWE (D18-23) L - W-B Memory SET switch signal Seat memory SET switch ON Below 1 V
      M1 (D18-16) - MSWE (D18-23) Y - W-B Memory 1 switch signal Seat memory 1 switch OFF 10 to 14 V
      M1 (D18-16) - MSWE (D18-23) Y - W-B Memory 1 switch signal Seat memory 1 switch ON Below 1 V
      M2 (D18-15) - MSWE (D18-23) G - W-B Memory 2 switch signal Seat memory 2 switch OFF 10 to 14 V
      M2 (D18-15) - MSWE (D18-23) G - W-B Memory 2 switch signal Seat memory 2 switch ON Below 1 V

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

  4. CHECK MULTIPLEX NETWORK DOOR ECU FRONT RH (FRONT PASSENGER DOOR ECU) 
    1. Disconnect the P11 ECU connector.
      Fig 4: Checking Multiplex Network Door ECU Front RH (Front Passenger Door ECU)
      G05293676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connector.
      MULTIPLEX NETWORK DOOR ECU FRONT RH (FRONT PASSENGER DOOR ECU) VOLTAGE AND RESISTANCE SPECIFICATION

      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) - GND (P11-1) L-O - W-B Battery (ECU power source) Always 10 to 14 V
      SIG (P11-5) - GND (P11-1) V-W - W-B Ignition power supply Ignition switch OFF Below 1 V
      SIG (P11-5) - GND (P11-1) V-W - W-B Ignition power supply Ignition switch ON 10 to 14 V
      BDR (P11-6) - GND (P11-1) G-Y - W-B Battery (ECU power source) Always 10 to 14 V

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

    3. Reconnect the P11 ECU connector.
    4. Measure the voltage of the connector.
      MULTIPLEX NETWORK DOOR ECU FRONT RH (FRONT PASSENGER DOOR ECU) VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MM (P10-24) - MSWE (P10-23) L - W-B Memory SET switch signal Seat memory SET switch OFF 10 to 14 V
      MM (P10-24) - MSWE (P10-23) L - W-B Memory SET switch signal Seat memory SET switch ON Below 1 V
      M1 (P10-16) - MSWE (P10-23) Y - W-B Memory 1 switch signal Seat memory 1 switch OFF 10 to 14 V
      M1 (P10-16) - MSWE (P10-23) Y - W-B Memory 1 switch signal Seat memory 1 switch ON Below 1 V
      M2 (P10-15) - MSWE (P10-23) G - W-B Memory 2 switch signal Seat memory 2 switch OFF 10 to 14 V
      M2 (P10-15) - MSWE (P10-23) G - W-B Memory 2 switch signal Seat memory 2 switch ON Below 1 V

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

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