REAR POWER SEAT CONTROL SYSTEM TERMINALS OF ECU


  1. CHECK POSITION CONTROL ECU LH

    A0019MVE03

    1. Disconnect the f24 and f41 ECU connectors.

    2. Measure the voltage and resistance of the wire harness connectors.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      f24-1 (+B) - f24-6 (GND) L - W-B Battery Always 11 to 14 V
      f41-16 (SYSB) - f24-6 (GND) R - W-B Power source Always 11 to 14 V
      f24-6 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f41-23 (SGND) - Body ground BR - 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 f24 and f41 ECU connectors.

    4. Measure the voltage of the connectors.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      f24-3 (SLD+) - f24-6 (GND) B - W-B Sliding motor signal (forward) Seat moving forward using sliding switch 11 to 14 V
      Other Below 1 V
      f24-8 (SLD-) - f24-6 (GND) W - W-B Sliding motor signal (rearward) Seat moving rearward using sliding switch 11 to 14 V
      Other Below 1 V
      f24-5 (HUP) - f24-6 (GND) R - W-B Headrest motor signal (upward) Headrest moving upward using headrest switch 11 to 14 V
      Other Below 1 V
      f24-12 (HDWN) - f24-6 (GND) L - W-B Headrest motor signal (downward) Headrest moving downward using headrest switch 11 to 14 V
      Other Below 1 V
      f24-9 (MR+) - f24-6 (GND) Y - W-B Upper lumbar motor signal (forward) Seatback moving forward using upper lumbar switch 11 to 14 V
      Other Below 1 V
      f24-10 (MR-) - f24-6 (GND) R - W-B Upper lumbar motor signal (rearward) Seatback moving rearward using upper lumbar switch 11 to 14 V
      Other Below 1 V
      f24-2 (RCL+) - f24-6 (GND)* Y - W-B Reclining motor signal (forward) Seatback moving forward using reclining switch 11 to 14 V
      Other Below 1 V
      f24-7 (RCL-) - f24-6 (GND)* B - W-B Reclining motor signal (rearward) Seatback moving rearward using reclining switch 11 to 14 V
      Other Below 1 V
      f24-4 (OTO+) - f24-6 (GND)* L - W-B Ottoman motor signal (upward) Ottoman moving upward using ottoman switch 11 to 14 V
      Other Below 1 V
      f24-11 (OTO-) - f24-6 (GND)* G-B - W-B Ottoman motor signal (downward) Ottoman moving downward using ottoman switch 11 to 14 V
      f41-17 (PVCC) - f41-23 (SGND) Y - BR Position sensor power supply Power seat operation 7.2 to 8.8 V
      f41-5 (SSRS) - f41-23 (SGND) W - BR Slide direction position signal Slide operation 0 to 8 V
      f41-6 (SSRH) - f41-23 (SGND) R - BR Headrest position signal Headrest operation 0 to 8 V
      f41-7 (SSMR) - f41-23 (SGND) LG - BR Upper lumbar position signal Upper lumbar operation 0 to 8 V
      f41-8 (SSRR) - f41-23 (SGND)* G - BR Reclining position signal Reclining operation 0 to 8 V
      f41-9 (SSRO) - f41-23 (SGND)* G - BR Ottoman position signal Ottoman operation 0 to 8 V

      • *: w/ Ottoman (for RHD)

  2. CHECK POSITION CONTROL ECU RH

    A001A6IE03

    1. Disconnect the f4 and f38 ECU connectors.

    2. Measure the voltage and resistance of the wire harness connectors.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      f4-1 (+B) - f4-6 (GND) L - W-B Battery Always 11 to 14 V
      f38-16 (SYSB) - f4-6 (GND) R - W-B Power source Always 11 to 14 V
      f4-6 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f38-23 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
      f38-26 (SEL) - f38-25 (SEL2) B - B Right or left identification Always Below 1 Ω

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

    3. Reconnect the f4 and f38 ECU connectors.

    4. Measure the voltage of the connectors.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      f4-3 (SLD+) - f4-6 (GND) R - W-B Sliding motor signal (forward) Seat moving forward using sliding switch 11 to 14 V
      Other Below 1 V
      f4-8 (SLD-) - f4-6 (GND) B - W-B Sliding motor signal (rearward) Seat moving rearward using sliding switch 11 to 14 V
      Other Below 1 V
      f4-5 (HUP) - f4-6 (GND) L - W-B Headrest motor signal (upward) Headrest moving upward using headrest switch 11 to 14 V
      Other Below 1 V
      f4-12 (HDWN) - f4-6 (GND) W - W-B Headrest motor signal (downward) Headrest moving downward using headrest switch 11 to 14 V
      Other Below 1 V
      f4-9 (MR+) - f4-6 (GND) P - W-B Upper lumbar motor signal (forward) Seatback moving forward using upper lumbar switch 11 to 14 V
      Other Below 1 V
      f4-10 (MR-) - f4-6 (GND) W - W-B Upper lumbar motor signal (rearward) Seatback moving rearward using upper lumbar switch 11 to 14 V
      Other Below 1 V
      f4-2 (RCL+) - f4-6 (GND)* Y - W-B Reclining motor signal (forward) Seatback moving forward using reclining switch 11 to 14 V
      Other Below 1 V
      f4-7 (RCL-) - f4-6 (GND)* B - W-B Reclining motor signal (rearward) Seatback moving rearward using reclining switch 11 to 14 V
      Other Below 1 V
      f4-4 (OTO+) - f4-6 (GND)* L - W-B Ottoman motor signal (upward) Ottoman moving upward using ottoman switch 11 to 14 V
      Other Below 1 V
      f4-11 (OTO-) - f4-6 (GND)* G-B - W-B Ottoman motor signal (downward) Ottoman moving downward using ottoman switch 11 to 14 V
      Other Below 1 V
      f38-17 (PVCC) - f38-23 (SGND) Y - BR Position sensor power supply Power seat operation 7.2 to 8.8 V
      f38-5 (SSRS) - f38-23 (SGND) W - BR Slide direction position signal Slide operation 0 to 8 V
      f38-6 (SSRH) - f38-23 (SGND) BE - BR Headrest position signal Headrest operation 0 to 8 V
      f38-7 (SSMR) - f38-23 (SGND) BE - BR Upper lumbar position signal Upper lumbar operation 0 to 8 V
      f38-8 (SSRR) - f38-23 (SGND)* Y - BR Reclining position signal Reclining operation 0 to 8 V
      f38-9 (SSRO) - f38-23 (SGND)* G - BR Ottoman position signal Ottoman operation 0 to 8 V

      • *: w/ Ottoman (for LHD)

  3. CHECK REAR DOOR ECU LH

    A001E1XE04

    1. Disconnect the O14 ECU connector.

    2. Measure the voltage and resistance of the wire harness connector.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      O14-11 (CPUB) - O14-1 (GND) R - W-B Battery (ECU power source) Always 11 to 14 V
      O14-6 (BDR) - O14-1 (GND) L - W-B Battery (ECU power source) Always 11 to 14 V
      O14-3 (SIG) - O14-1 (GND) Y - W-B Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      O14-1 (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 O14 ECU connector.

    4. Measure the voltage of the connector.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      O15-19 (M) - O15-29 (MSWE) B - P Memory M switch signal Memory M switch OFF Pulse generation
      Memory M switch ON Below 1 V
      O15-18 (CAN) - O15-29 (MSWE) BE - P Memory C switch signal Memory C switch OFF Pulse generation
      Memory C switch ON Below 1 V
      O15-22 (SET) - O15-29 (MSWE) W - P Memory SET switch signal Memory SET switch OFF Pulse generation
      Memory SET switch ON Below 1 V

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

  4. CHECK REAR DOOR ECU RH

    A001D7VE04

    1. Disconnect the O3 ECU connector.

    2. Measure the voltage and resistance of the wire harness connector.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      O3-11 (CPUB) - O3-1 (GND) R - W-B Battery (ECU power source) Always 11 to 14 V
      O3-6 (BDR) - O3-1 (GND) L - W-B Battery (ECU power source) Always 11 to 14 V
      O3-3 (SIG) - O3-1 (GND) GR - W-B Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      O3-1 (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 O3 ECU connector.

    4. Measure the voltage of the connector.

      Terminal No.

      (Symbols)

      		 Wiring Color Terminal Description Condition Specified Condition
      O2-19 (M) - O2-29 (MSWE) B - P Memory M switch signal Memory M switch OFF Pulse generation
      Memory M switch ON Below 1 V
      O2-18 (CAN) - O2-29 (MSWE) BE - P Memory C switch signal Memory C switch OFF Pulse generation
      Memory C switch ON Below 1 V
      O2-22 (SET) - O2-29 (MSWE) W - P Memory SET switch signal Memory SET switch OFF Pulse generation
      Memory SET switch ON Below 1 V

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