SEAT VIBRATION SYSTEM TERMINALS OF ECU


  1. CHECK POSITION CONTROL ECU ASSEMBLY (w/ Front Refreshing Seat)


    1. for LHD:

      B004VATN02

      1. Disconnect the Q27 and Q28 position control ECU assembly connectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q27-1 (+B2) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
        Q28-1 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q28-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q28-19 (IG) - Body ground SB - Body ground Ignition power supply Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V

      3. Reconnect the Q27 and Q28 position control ECU assembly connectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q28-3 (POMG) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q28-3 (POMG) - Q28-4 (POM) W-B - V Lumbar support pump sub-assembly operation Lumbar support pump sub-assembly operating 11 to 14 V
        Q28-7 (LIN) - Body ground SB - Body ground LIN communication line Power switch on (IG) Pulse generation

    2. for RHD:

      B004VATN01

      1. Disconnect the Q7 and Q8 position control ECU assembly connectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q7-1 (+B2) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
        Q8-1 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q8-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q8-19 (IG) - Body ground SB - Body ground Ignition power supply Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V

      3. Reconnect the Q7 and Q8 position control ECU assembly connectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q8-3 (POMG) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q8-3 (POMG) - Q8-4 (POM) W-B - V Lumbar support pump sub-assembly operation Lumbar support pump sub-assembly operating 11 to 14 V
        Q8-7 (LIN) - Body ground SB - Body ground LIN communication line Power switch on (IG) Pulse generation

  2. CHECK NO. 2 POSITION CONTROL ECU ASSEMBLY (w/ Front Refreshing Seat)


    1. for LHD:

      B004VATN01

      1. Disconnect the R6 and R7 No. 2 position control ECU assembly onnectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q7-1 (+B2) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
        Q8-1 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q8-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q8-19 (IG) - Body ground SB - Body ground Ignition power supply Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V

      3. Reconnect the Q27 and Q28 No. 2 position control ECU assembly connectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q8-3 (POMG) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q8-3 (POMG) - Q8-4 (POM) W-B - V Lumbar support pump sub-assembly operation Lumbar support pump sub-assembly operating 11 to 14 V
        Q8-7 (LIN) - Body ground SB - Body ground LIN communication line Power switch on (IG) Pulse generation

    2. for RHD:

      B004VATN02

      1. Disconnect the Q27 and Q28 No. 2 position control ECU assembly connectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q27-1 (+B2) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
        Q28-1 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q28-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q28-19 (IG) - Body ground SB - Body ground Ignition power supply Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V

      3. Reconnect the Q27 and Q28 No. 2 position control ECU assembly connectors.

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        Q28-3 (POMG) - Body ground W-B - Body ground Ground Always Below 1 Ω
        Q28-3 (POMG) - Q28-4 (POM) W-B - V Lumbar support pump sub-assembly operation Lumbar support pump sub-assembly operating 11 to 14 V
        Q28-7 (LIN) - Body ground SB - Body ground LIN communication line Power switch on (IG) Pulse generation

  3. CHECK POSITION CONTROL ECU ASSEMBLY LH

    B004X55N02

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

    2. Measure the voltage and resistance 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
      R41-15 (IG) - Body ground LG - Body ground Ignition power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V

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

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R40-10 (POM) - R40-11 (POMG) B - R Lumbar support pump sub-assembly operation Lumbar support pump sub-assembly operating 11 to 14 V
      R40-11 (POMG) - Body ground R - Body ground Ground Always Below 1 Ω
      R41-2 (LINM) - Body ground BR - Body ground LIN communication line Power switch on (IG) Pulse generation
      R40-2 (HT2) - R40-5 (HTG2) G - LG Heater power supply Heating massage function ON 19.8 to 24.2 Ω
      R40-3 (HT1) - R40-6 (HTG1) R - P Heater power supply Heating massage function ON 19.8 to 24.2 Ω
      R40-4 (NTC3) - R40-7 (SGND) L - BR Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R40-6 (NTC1) - R40-7 (SGND) R - BR Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R40-7 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
      R40-22 (NTC4) - R40-7 (SGND) GR - BR Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R40-23 (NTC2) - R40-7 (SGND) B - R Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R41-3 (BCL1) - Body ground R - Body ground Rear RH seat belt buckle switch signal Rear RH seat belt fastened 10 kΩ or higher
      Rear RH seat belt unfastened Below 1 Ω
      R41-17 (ODS) - Body ground BR - Body ground Occupant detection sensor signal Rear seat RH occupied Below 100 Ω
      Rear seat RH not occupied 1 MΩ or higher

  4. CHECK POSITION CONTROL ECU ASSEMBLY RH

    B004X55N01

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

    2. Measure the voltage and resistance 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
      R7-15 (IG) - Body ground LG - Body ground Ignition power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V

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

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R6-10 (POM) - R6-11 (POMG) B - R Lumbar support pump sub-assembly operation Lumbar support pump sub-assembly operating 11 to 14 V
      R6-11 (POMG) - Body ground R - Body ground Ground Always Below 1 Ω
      R7-2 (LINM) - Body ground BR - Body ground LIN communication line Power switch on (IG) Pulse generation
      R6-2 (HT2) - R6-5 (HTG2) G - LG Heater power supply Heating massage function ON 19.8 to 24.2 Ω
      R6-3 (HT1) - R6-6 (HTG1) R - P Heater power supply Heating massage function ON 19.8 to 24.2 Ω
      R6-4 (NTC3) - R6-7 (SGND) L - BR Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R6-6 (NTC1) - R6-7 (SGND) R - BR Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R6-7 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
      R6-22 (NTC4) - R6-7 (SGND) GR - BR Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R6-23 (NTC2) - R6-7 (SGND) B - R Thermistor input signal Heating massage function ON 25°C: 8 kΩ
      R7-3 (BCL1) - Body ground R - Body ground Rear RH seat belt buckle switch signal Rear RH seat belt fastened 10 kΩ or higher
      Rear RH seat belt unfastened Below 1 Ω
      R7-17 (ODS) - Body ground BR - Body ground Occupant detection sensor signal Rear seat RH occupied Below 100 Ω
      Rear seat RH not occupied 1 MΩ or higher