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Terminals Of Ecu

  1. CHECK FRONT POWER SEAT SWITCH LH 
    Fig 1: Identifying e45 And e46 Front Power Seat Switch Connector Terminals
    G05856027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the e45 and e46 switch connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      e45-6 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      e45-7 (+B) - e45-6 (GND) B-R - W-B Battery (ECU power source) Always 11 to 14 V
      e46-4 (SYSB) - e45-6 (GND) B - W-B Battery (ECU power source) Always 11 to 14 V

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

    3. Reconnect the e45 and e46 switch connectors.
    4. Measure the voltage of the connectors.
      CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      e46-12 (SLD+) - e45-6 (GND) B - W-B Sliding motor signal (forward) Seat moving forward using sliding switch 11 to 14 V
      Other Below 1 V
      e46-11 (SLD-) - e45-6 (GND) W - W-B Sliding motor signal (rearward) Seat moving rearward using sliding switch 11 to 14 V
      Other Below 1 V
      e46-10 (C+) - e45-6 (GND) W - W-B Seat cushion motor signal (forward) Seat cushion moving forward using cushion switch 11 to 14 V
      Other Below 1 V
      e45-4 (C-) - e45-6 (GND) R-B - W-B Seat cushion motor signal (rearward) Seat cushion moving rearward using cushion switch 11 to 14 V
      Other Below 1 V
      e46-1 (FRV+) - e45-6 (GND) R - W-B Front vertical motor signal (upward) Seat cushion front portion raising using front vertical switch 11 to 14 V
      Other Below 1 V
      e45-12 (FRV-) - e45-6 (GND) W - W-B Front vertical motor signal (downward) Seat cushion front portion lowering using front vertical switch 11 to 14 V
      Other Below 1 V
      e46-3 (RCL+) - e45-6 (GND) L - W-B Reclining motor signal (forward) Seatback moving forward using reclining switch 11 to 14 V
      Other Below 1 V
      e45-3 (RCL-) - e45-6 (GND) B-W - W-B Reclining motor signal (rearward) Seatback moving rearward using reclining switch 11 to 14 V
      Other Below 1 V
      e45-11 (H+) - e45-6 (GND) G-B - W-B Headrest motor signal (upward) Headrest moving upward using headrest switch 11 to 14 V
      Other Below 1 V
      e45-8 (H-) - e45-6 (GND) L - W-B Headrest motor signal (downward) Headrest moving downward using headrest switch 11 to 14 V
      Other Below 1 V
      e46-2 (RRV+) - e45-6 (GND) B-R - W-B Lifter motor signal (upward) Seat raising using lifter switch 11 to 14 V
      Other Below 1 V
      e45-5 (RRV-) - e45-6 (GND) Y - W-B Lifter motor signal (downward) Seat lowering using lifter switch 11 to 14 V
      Other Below 1 V
      e45-9 (LV+) - e45-6 (GND) R - W-B Lumbar motor signal (upward) Lumbar switch (upward) ON 11 to 14 V
      Other Below 1 V
      e45-2 (LV-) - e45-6 (GND) L-R - W-B Lumbar motor signal (downward) Lumbar switch (downward) ON 11 to 14 V
      Other Below 1 V
      e45-10 (L+) - e45-6 (GND) R-L - W-B Lumbar motor signal (forward) Lumbar switch (forward) ON 11 to 14 V
      Other Below 1 V
      e45-1 (L-) - e45-6 (GND) G-Y - W-B Lumbar motor signal (rearward) Lumbar switch (rearward) ON 11 to 14 V
      Other Below 1 V
      e46-8 (PVCC) - e45-6 (GND) V - W-B Position sensor power supply Power seat operation 7.2 to 8.8 V
      e46-23 (SSRS) - e45-6 (GND) LG - W-B Slide direction position signal Slide operation 0 to 8V
      e46-19 (SSFV) - e45-6 (GND) GR - W-B Front vertical direction position signal Front vertical operation 0 to 8V
      e46-9 (SSRV) - e45-6 (GND) L - W-B Lifter position signal Lifter operation 0 to 8V
      e46-22 (SSRR) - e45-6 (GND) GR - W-B Reclining position signal Reclining operation 0 to 8V
      e46-21 (SSRH) - e45-6 (GND) O - W-B Headrest position signal Headrest operation 0 to 8V
      e46-20 (SSRC) - e45-6 (GND) GR - W-B Seat cushion position signal Seat cushion operation 0 to 8V

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

  2. CHECK FRONT POWER SEAT SWITCH RH 
    Fig 2: Identifying e18 And e20 Front Power Seat Switch Connector Terminals
    G04952420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the e18 and e20 switch connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      e18-6 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      e18-7 (+B) - e45-6 (GND) B - W-B Battery (ECU power source) Always 11 to 14 V
      e20-4 (SYSB) - e45-6 (GND) R - W-B Battery (ECU power source) Always 11 to 14 V

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

    3. Reconnect the e18 and e20 switch connectors.
    4. Measure the voltage of the connectors.
      CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      e20-12 (SLD+) - e18-6 (GND) B - W-B Sliding motor signal (forward) Seat moving forward using sliding switch 11 to 14 V
      Other Below 1 V
      e20-11 (SLD-) - e18-6 (GND) R - W-B Sliding motor signal (rearward) Seat moving rearward using sliding switch 11 to 14 V
      Other Below 1 V
      e20-1 (FUP) - e18-6 (GND) R - W-B Front vertical motor signal (upward) Seat cushion front portion raising using front vertical switch 11 to 14 V
      Other Below 1 V
      e18-12 (FDWN) - e18-6 (GND) L - W-B Front vertical motor signal (downward) Seat cushion front portion lowering using front vertical switch 11 to 14 V
      Other Below 1 V
      e20-3 (RCL+) - e18-6 (GND) L - W-B Reclining motor signal (forward) Seatback moving forward using reclining switch 11 to 14 V
      Other Below 1 V
      e18-3 (RCL-) - e18-6 (GND) B-W - W-B Reclining motor signal (rearward) Seatback moving rearward using reclining switch 11 to 14 V
      Other Below 1 V
      e18-11 (H+) - e18-6 (GND) W - W-B Headrest motor signal (upward) Headrest moving upward using headrest switch 11 to 14 V
      Other Below 1 V
      e18-8 (H-) - e18-6 (GND) Y - W-B Headrest motor signal (downward) Headrest moving downward using headrest switch 11 to 14 V
      Other Below 1 V
      e20-2 (RUP) - e18-6 (GND) B - W-B Lifter motor signal (upward) Seat raising using lifter switch 11 to 14 V
      Other Below 1 V
      e18-5 (RDWN) - e18-6 (GND) G-B - W-B Lifter motor signal (downward) Seat lowering using lifter switch 11 to 14 V
      Other Below 1 V
      e18-10 (L+) - e18-6 (GND) R-L - W-B Lumber motor signal (forward) Lumbar switch (forward) ON 11 to 14 V
      Other Below 1 V
      e18-1 (L-) - e18-6 (GND) G-Y - W-B Lumber motor signal (rearward) Lumbar switch (rearward) ON 11 to 14 V
      Other Below 1 V
      e20-8 (PVCC) - e18-6 (GND) V - W-B Position sensor power supply Power seat operation 7.2 to 8.8 V
      e20-23 (SSRS) - e18-6 (GND) LG - W-B Slide direction position signal Slide operation 0 to 8V
      e20-9 (SSRL) - e18-6 (GND) LGL - W-B Lifter position signal Lifter operation 0 to 8V
      e20-22 (SSRR) - e18-6 (GND) LG - W-B Reclining position signal Reclining operation 0 to 8V
      e20-21 (SSRH) - e18-6 (GND) O - W-B Headrest position signal Headrest operation 0 to 8V

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

  3. CHECK FRONT DOOR ECU LH 
    Fig 3: Identifying N10 And P10 Front Door ECU Connector Terminals
    G04944406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N10 ECU connector.
    2. Measure the voltage of the wire harness side connector.
      CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      N10-11 (CPUB) - N10-1 (GND) B - W-B Battery (ECU power source) Always 11 to 14 V
      N10-3 (SIG) - N10-1 (GND) L - W-B Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      N10-6 (BDR) - N10-1 (GND) O - W-B Battery (ECU power source) Always 11 to 14 V
      N10-1 (GND) - 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 N10 ECU connector.
    4. Measure the voltage of the P10 ECU connector.
      CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      P10-13 (M1) - P10-29 (MSWE) R-V Memory 1 switch signal Memory 1 switch OFF 11 to 14 V
      Memory 1 switch ON Below 1 V
      P10-14 (M2) - P10-29 (MSWE) B-V Memory 2 switch signal Memory 2 switch OFF 11 to 14 V
      Memory 2 switch ON Below 1 V
      P10-15 (M3) - P10-29 (MSWE) Y-V Memory 3 switch signal Memory 3 switch OFF 11 to 14 V
      Memory 3 switch ON Below 1 V
      P10-16 (MM) - P10-29 (MSWE) O-V Memory SET switch signal Memory SET switch OFF 11 to 14 V
      Memory SET switch ON Below 1 V

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

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