REAR POWER SEAT CONTROL SYSTEM TERMINALS OF ECU


  1. POSITION CONTROL ECU ASSEMBLY RH

    B004X55N01

    1. Disconnect the R6 and R7 position control ECU assembly RH connectors.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R6-8 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      R6-9 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      R6-12 (+B3) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R6-13 (+B2) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R6-14 (+B1) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R6-16 (SYSB) - Body ground BR - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R7-15 (IG) - Body ground BR - Body ground Ignition power supply Power switch off - Power switch on (IG) Below 1 V → 11 to 14 V
      R7-28 (SYSG) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the R6 and R7 position control ECU assembly RH connectors.

    4. Measure the resistance and voltage, check for waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R4-1 (OTE-) - Body ground* R - Body ground Ottoman long/short motor signal (short) Ottoman switch off Below 1 V
      Ottoman switch on (short) 11 to 14 V
      R4-2 (FRV-) - Body ground R - Body ground Front tilt motor signal (downward) Front vertical switch off Below 1 V
      Front vertical switch on (downward) 11 to 14 V
      R4-3 (HD-) - Body ground R - Body ground Headrest front/rear motor signal (rearward) Headrest switch off Below 1 V
      Headrest switch on (rearward) 11 to 14 V
      R4-4 (OTG-) - Body ground* R - Body ground Ottoman up/down motor signal (down) Ottoman switch off Below 1 V
      Ottoman switch on (down) 11 to 14 V
      R4-5 (H-) - Body ground R - Body ground Headrest up/down motor signal (downward) Headrest switch off Below 1 V
      Headrest switch on (downward) 11 to 14 V
      R4-6 (RCL-) - Body ground* G - Body ground Reclining motor signal (rearward) Reclining switch off Below 1 V
      Reclining switch on (rearward) 11 to 14 V
      R5-1 (SLD+) - Body ground GR - Body ground Slide motor signal (forward) Slide switch off Below 1 V
      Slide switch on (forward) 11 to 14 V
      R5-3 (OTE+) - Body ground* B - Body ground Ottoman long/short motor signal (long) Ottoman switch off Below 1 V
      Ottoman switch on (long) 11 to 14 V
      R5-4 (FRV+) - Body ground B - Body ground Front tilt motor signal (upward) Front vertical switch off Below 1 V
      Front vertical switch on (upward) 11 to 14 V
      R5-6 (SLD-) - Body ground L - Body ground Slide motor signal (rearward) Slide switch off Below 1 V
      Slide switch on (rearward) 11 to 14 V
      R5-7 (HD+) - Body ground B - Body ground Headrest front/rear motor signal (forward) Headrest switch off Below 1 V
      Headrest switch on (forward) 11 to 14 V
      R5-8 (OTG+) - Body ground* B - Body ground Ottoman up/down motor signal (up) Ottoman switch off Below 1 V
      Ottoman switch on (up) 11 to 14 V
      R5-9 (H+) - Body ground B - Body ground Headrest up/down motor signal (upward) Headrest switch off Below 1 V
      Headrest switch on (upward) 11 to 14 V
      R5-10 (RCL+) - Body ground* R - Body ground Reclining motor signal (forward) Reclining switch off Below 1 V
      Reclining switch on (forward) 11 to 14 V
      R7-1 (LINS) - Body ground GR - Body ground LIN communication line Power switch on (IG) Pulse generation
      R7-2 (LINM) - Body ground BR - Body ground LIN communication line Power switch on (IG) Pulse generation
      R7-7 (SGND) - Body ground BR - Body ground Sensor ground Always Below 1 Ω
      R7-10 (SOTE) - Body ground* P - Body ground Ottoman position signal Ottoman long/short motor operating 4.8 to 5.1 V
      R7-11 (SSFV) - Body ground L - Body ground Front vertical position signal Front tilt motor operating 4.8 to 5.1 V
      R7-12 (SSRS) - Body ground G - Body ground Slide position signal Slide motor operating 4.8 to 5.1 V
      R7-13 (SSRR) - Body ground L - Body ground Reclining position signal Reclining motor operating 4.8 to 5.1 V
      R7-25 (SSHD) - Body ground P - Body ground Headrest position signal Headrest front/rear motor operating 4.8 to 5.1 V
      R7-26 (SSRH) - Body ground P - Body ground Headrest position signal Headrest up/down motor operating 4.8 to 5.1 V
      R7-27 (SOTG) - Body ground* P - Body ground Ottoman position signal Ottoman long/short motor operating 4.8 to 5.1 V
      R7-30 (PVC2) - Body ground* V - Body ground Reclining position signal Reclining motor operating 4.8 to 5.1 V

      • *: w/ Ottoman (for LHD)

  2. POSITION CONTROL ECU ASSEMBLY LH

    B004X55N02

    1. Disconnect the R40 and R41 position control ECU assembly LH connectors.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R40-8 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      R40-9 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      R40-12 (+B3) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R40-13 (+B2) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R40-14 (+B1) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R40-16 (SYSB) - Body ground BR - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      R41-15 (IG) - Body ground BR - Body ground Ignition power supply Power switch off - Power switch on (IG) Below 1 V → 11 to 14 V
      R41-28 (SYSG) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the R40 and R41 position control ECU assembly LH connectors.

    4. Measure the resistance and voltage, check for waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R38-1 (OTE-) - Body ground* R - Body ground Ottoman long/short motor signal (short) Ottoman switch off Below 1 V
      Ottoman switch on (short) 11 to 14 V
      R38-2 (FRV-) - Body ground R - Body ground Front tilt motor signal (downward) Front vertical switch off Below 1 V
      Front vertical switch on (downward) 11 to 14 V
      R38-3 (HD-) - Body ground R - Body ground Headrest front/rear motor signal (rearward) Headrest switch off Below 1 V
      Headrest switch on (rearward) 11 to 14 V
      R38-4 (OTG-) - Body ground* R - Body ground Ottoman up/down motor signal (down) Ottoman switch off Below 1 V
      Ottoman switch on (down) 11 to 14 V
      R38-5 (H-) - Body ground R - Body ground Headrest up/down motor signal (downward) Headrest switch off Below 1 V
      Headrest switch on (downward) 11 to 14 V
      R38-6 (RCL-) - Body ground* G - Body ground Reclining motor signal (rearward) Reclining switch off Below 1 V
      Reclining switch on (rearward) 11 to 14 V
      R39-1 (SLD+) - Body ground GR - Body ground Slide motor signal (forward) Slide switch off Below 1 V
      Slide switch on (forward) 11 to 14 V
      R39-3 (OTE+) - Body ground* B - Body ground Ottoman long/short motor signal (long) Ottoman switch off Below 1 V
      Ottoman switch on (long) 11 to 14 V
      R39-4 (FRV+) - Body ground B - Body ground Front tilt motor signal (upward) Front vertical switch off Below 1 V
      Front vertical switch on (upward) 11 to 14 V
      R39-6 (SLD-) - Body ground L - Body ground Slide motor signal (rearward) Slide switch off Below 1 V
      Slide switch on (rearward) 11 to 14 V
      R39-7 (HD+) - Body ground B - Body ground Headrest front/rear motor signal (forward) Headrest switch off Below 1 V
      Headrest switch on (forward) 11 to 14 V
      R39-8 (OTG+) - Body ground* B - Body ground Ottoman up/down motor signal (upward) Ottoman switch off Below 1 V
      Ottoman switch on (up) 11 to 14 V
      R39-9 (H+) - Body ground B - Body ground Headrest up/down motor signal (upward) Headrest switch off Below 1 V
      Headrest switch on (upward) 11 to 14 V
      R39-10 (RCL+) - Body ground* R - Body ground Reclining motor signal (forward) Reclining switch off Below 1 V
      Reclining switch on (forward) 11 to 14 V
      R41-1 (LINS) - Body ground GR - Body ground LIN communication line Power switch on (IG) Pulse generation
      R41-2 (LINM) - Body ground BR - Body ground LIN communication line Power switch on (IG) Pulse generation
      R41-7 (SGND) - Body ground BR - Body ground Sensor ground Always Below 1 Ω
      R41-10 (SOTE) - Body ground* P - Body ground Ottoman position signal Ottoman long/short motor operating 4.8 to 5.1 V
      R41-11 (SSFV) - Body ground L - Body ground Front vertical position signal Front tilt motor operating 4.8 to 5.1 V
      R41-12 (SSRS) - Body ground G - Body ground Slide position signal Slide motor operating 4.8 to 5.1 V
      R41-13 (SSRR) - Body ground L - Body ground Reclining position signal Reclining motor operating 4.8 to 5.1 V
      R41-25 (SSHD) - Body ground P - Body ground Headrest position signal Headrest front/rear motor operating 4.8 to 5.1 V
      R41-26 (SSRH) - Body ground P - Body ground Headrest position signal Headrest up/down motor operating 4.8 to 5.1 V
      R41-27 (SOTG) - Body ground* P - Body ground Ottoman position signal Ottoman long/short motor operating 4.8 to 5.1 V
      R41-30 (PVC2) - Body ground* V - Body ground Reclining position signal Reclining motor operating 4.8 to 5.1 V

      • *: w/ Ottoman (for RHD)