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Terminals Of Ecu

  1. FRONT POWER SEAT SWITCH LH (MEMORY SEAT ECU AND SW) 
    Fig 1: Identifying Front Power Seat Switch LH (Memory Seat ECU And SW) Connector Terminals
    G02937349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M6 and M7 connectors.
    2. Check the voltage of each terminal of the wire harness side connectors.

      Standard: 

      CHECKING VOLTAGE CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (M6-4) - M7-1 (GND) Y - W-B Ignition switch Ignition switch OFF --> ON Below 1 V --> 10 to 14V
      SYSB (M6-8) - M7-1 (GND) GR - W-B Power source Always 10 to 14V
      GND (M7-1) - Body ground W-B - Body ground Ground Always Below 1 V
      +B (M7-5) - M7-1 (GND) L-O - W-B Battery Always 10 to 14V

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

    3. Reconnect the M6 and M7 ECU connectors.
    4. Check the voltage of each terminal of the connectors.

    Standard: 

    CHECKING VOLTAGE CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    SI (M6-1) - GND (M7-1) G-Y - W-B Communication signal Memory switch ON and ignition switch ON Pulse generation
    SW1 (M6-2) - GND (M7-1) P - W-B Seat memory switch signal (Switch 1) Seat memory switch 1 is free --> pushed 10 to 14 V --> Below 1 V
    DCTY (M6-3) - GND (M7-1) R-G - W-B Driver side door courtesy lamp switch signal Driver side door is open --> closed Below 1 V --> 10 to 14V
    MMRY (M6-5) - GND (M7-1) P-L - W-B Seat memory switch signal (Set) Seat memory switch SET is free --> pushed 10 to 14 V --> Below 1 V
    SW2 (M6-6) - GND (M7-1) P-B - W-B Seat memory switch signal (Switch 2) Seat memory switch 2 is free --> pushed 10 to 14 V --> Below 1 V
    P (M6-7) - GND (M7-1) G-W - W-B Park/neutral position switch signal Ignition switch ON and shift lever P position --> other than P position 10 to 14 V --> Below 1 V
    SLD+ (M7-2) - GND (M7-1) L - W-B Sliding motor signal (Forward) Seat moving forward using sliding switch --> Others 10 to 14 V --> Below 1 V
    SLD - (M7-3) - GND (M7-1) Y - W-B Sliding motor signal (Rearward) Seat moving rearward using sliding switch --> Others 10 to 14 V --> Below 1 V
    FRV- (M7-4) - GND (M7-1) B - W-B Front vertical motor signal (Downward) Seat cushion front portion lowering using front vertical switch --> Others 10 to 14V --> Below 1 V
    FRV+ (M7-6) - GND (M7-1) G - W-B Front vertical motor signal (Upward) Seat cushion front portion raising using front vertical switch --> Others 10 to 14 V --> Below 1 V
    LFT+ (M7-7) - GND (M7-1) W - W-B Lifter motor signal (Upward) Seat raising using lifter switch --> Others 10 to 14 V --> Below 1 V
    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    RCL+ (M7-8) - GND (M7-1) P - W-B Reclining motor signal (Forward) Seatback moving forward using reclining switch --> Others 10 to 14 V --> Below 1 V
    LFT- (M7-9) - GND (M7-1) V - W-B Lifter motor signal (Downward) Seat lowering using lifter switch --> Others 10 to 14 V --> Below 1 V
    RCL- (M7-10) - GND (M7-1) BR - W-B Reclining motor signal (Rearward) Seatback moving rearward using reclining switch --> Others 10 to 14 V --> Below 1 V

    If the result is not as specified, the front power seat switch LH may be malfunctioning.

  2. FRONT POWER SEAT SWITCH RH (MEMORY SEAT ECU AND SW) 
    Fig 2: Identifying Front Power Seat Switch RH (Memory Seat ECU And SW) Connector Terminals
    G02937350Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M8 and M9 ECU connectors.
    2. Check the voltage of each terminal of the wire harness side connectors.

      Standard: 

      CHECKING VOLTAGE CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (M8-4) - GND (M9-1) Y - W-B Ignition switch Ignition switch OFF --> ON Below 1 V --> 10 to 14V
      SYSB (M8-8) - GND (M9-1) GR - W-B Power source Constant 10 to 14V
      GND (M9-1) - Body ground W-B - Body ground Ground Constant Below 1 V
      +B (M9-5) - GND (M9-1) L-O - W-B Battery Constant 10 to 14V

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

    3. Reconnect the M8 and M9 ECU connectors.
    4. Check the voltage of each terminal of the connectors.

    Standard: 

    CHECKING VOLTAGE CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    SW1 (M8-2) - GND (M9-1) P - W-B Seat memory switch signal (Switch 1) Seat memory switch 1 is free --> pushed 10 to 14 V --> Below 1 V
    PCTY (M8-3) - GND (M9-1) R-G - W-B Front passenger side door courtesy lamp switch signal Front passenger side door is open --> closed Below 1 V --> 10 to 14V
    MMRY (M8-5) - GND (M9-1) P-L - W-B Seat memory switch signal (Set) Seat memory switch SET is free --> pushed 10 to 14 V --> Below 1 V
    SW2 (M8-6) - GND (M9-1) P-B - W-B Seat memory switch signal (Switch 2) Seat memory switch 2 is free --> pushed 10 to 14 V --> Below 1 V
    P (M8-7) - GND (M9-1) G-W - W-B Park/neutral position switch signal Ignition switch ON and shift lever P position --> other than P position 10 to 14V --> Below 1 V
    SLD+ (M9-2) - GND (M9-1) L - W-B Sliding motor signal (Forward) Seat moving forward using sliding switch --> Others 10 to 14 V --> Below 1 V
    SLD- (M9-3) - GND (M9-1) Y - W-B Sliding motor signal (Rearward) Seat moving rearward using sliding switch --> Others 10 to 14 V --> Below 1 V
    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    FRV - (M9-4) - GND (M9-1) L-W - W-B Front vertical motor signal (Downward) Seat cushion front portion lowering using front vertical switch --> Others 10 to 14 V --> Below 1 V
    FRV+ (M9-6) - GND (M9-1) L-R - W-B Front vertical motor signal (Upward) Seat cushion front portion raising using front vertical switch --> Others 10 to 14 V --> Below 1 V
    LFT+ (M9-7) - GND (M9-1) L-Y - W-B Lifter motor signal (Upward) Seat raising using lifter switch --> Others 10 to 14 V --> Below 1 V
    RCL+ (M9-8) - GND (M9-1) P - W-B Reclining motor signal (Forward) Seatback moving forward using reclining switch --> Others 10 to 14 V --> Below 1 V
    LFT- (M9-9) - GND (M9-1) R - W-B Lifter motor signal (Downward) Seat lowering using lifter switch --> Others 10 to 14 V Below 1 V
    RCL- (M9-10) - GND (M9-1) BR - W-B Reclining motor signal (Rearward) Seatback moving rearward using reclining switch --> Others 10 to 14 V --> Below 1 V

    If the result is not as specified, the front power seat switch RH may be malfunctioning.

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