FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) TERMINALS OF ECU


  1. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (for LHD)


    1. Disconnect the e18 and e6 position control ECU and switch assembly connectors.

      A01VATTN07

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

      Terminal Connection Wiring Color Terminal Description Condition Specified Condition
      e18-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      e18-7 (+B1) - e18-2 (GND) W - W-B Battery supply Always 11 to 14 V
      e6-3 (IG) - e18-2 (GND) R - W-B IG power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      e6-12 (SYSB) - e18-2 (GND) P - W-B System power supply Always 11 to 14 V

    3. Reconnect the e18 and e6 position control ECU and switch assembly connectors.

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

      Terminal Connection Wiring Color Terminal Description Condition Specified Condition
      e18-6 (+B2) - e18-1 (GND2) SB - W-B Lumbar support adjuster power source Always 11 to 14 V
      e18-1 (GND2) - Body ground W-B - Body ground Lumbar support adjuster ground Always Below 1 Ω
      e18-3 (SLD+) - e18-2 (GND1) L - W-B Slide motor signal (forward) Slide switch off Below 1 V
      Slide switch on (Forward) 11 to 14 V
      e18-4 (SLD-) - e18-2 (GND1) GR - W-B Slide motor signal (rearward) Slide switch off Below 1 V
      Slide switch on (Rearward) 11 to 14 V
      e18-5 (FRV-) - e18-2 (GND1) R - W-B Front vertical motor signal (downward) Front vertical switch off Below 1 V
      Front vertical switch on (Downward) 11 to 14 V
      e18-8 (FRV+) - e18-2 (GND1) B - W-B Front vertical motor signal (upward) Front vertical switch off Below 1 V
      Front vertical switch on (Upward) 11 to 14 V
      e18-9 (RCL+) - e18-2 (GND1) P - W-B Reclining motor signal (forward) Reclining switch off Below 1 V
      Reclining switch on (Forward) 11 to 14 V
      e18-11 (RCL-) - e18-2 (GND1) LG - W-B Reclining motor signal (rearward) Reclining switch off Below 1 V
      Reclining switch on (Rearward) 11 to 14 V
      e18-10 (LFT+) - e18-2 (GND1) V - W-B Lifter motor signal (upward) Lifter switch off Below 1 V
      Lifter switch on (Upward) 11 to 14 V
      e18-12 (LFT-) - e18-2 (GND1) G - W-B Lifter motor signal (downward) Lifter switch off Below 1 V
      Lifter switch on (Downward) 11 to 14 V

  2. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (for RHD)


    1. Disconnect the d27 and d28 position control ECU and switch assembly connectors.

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

      Terminal Connection Wiring Color Terminal Description Condition Specified Condition
      d27-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      d27-7 (+B1) - d27-2 (GND1) W - W-B Battery supply Always 11 to 14 V
      d28-3 (IG) - d27-2 (GND) R - W-B IG power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      d28-12 (SYSB) - d27-2 (GND) P - W-B System power supply Always 11 to 14 V

    3. Reconnect the d27 and d28 position control ECU and switch assembly connectors.

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

      Terminal Connection Wiring Color Terminal Description Condition Specified Condition
      d27-6 (+B2) - d27-1 (GND2) SB - W-B Lumbar support adjuster power source Always 11 to 14 V
      d27-1 (GND2) - Body ground W-B - Body ground Lumbar support adjuster ground Always Below 1 Ω
      d27-3 (SLD+) - d27-2 (GND1) L - W-B Slide motor signal (forward) Slide switch off Below 1 V
      Slide switch on (Forward) 11 to 14 V
      d27-4 (SLD-) - d27-2 (GND1) GR - W-B Slide motor signal (rearward) Slide switch off Below 1 V
      Slide switch on (Rearward) 11 to 14 V
      d27-5 (FRV-) - d27-2 (GND1) R - W-B Front vertical motor signal (downward) Front vertical switch off Below 1 V
      Front vertical switch on (Downward) 11 to 14 V
      d27-8 (FRV+) - d27-2 (GND1) B - W-B Front vertical motor signal (upward) Front vertical switch off Below 1 V
      Front vertical switch on (Upward) 11 to 14 V
      d27-9 (RCL+) - d27-2 (GND1) P - W-B Reclining motor signal (forward) Reclining switch off Below 1 V
      Reclining switch on (Forward) 11 to 14 V
      d27-11 (RCL-) - d27-2 (GND1) LG - W-B Reclining motor signal (rearward) Reclining switch off Below 1 V
      Reclining switch on (Rearward) 11 to 14 V
      d27-10 (LFT+) - d27-2 (GND1) V - W-B Lifter motor signal (upward) Lifter switch off Below 1 V
      Lifter switch on (Upward) 11 to 14 V
      d27-12 (LFT-) - d27-2 (GND1) G - W-B Lifter motor signal (downward) Lifter switch off Below 1 V
      Lifter switch on (Downward) 11 to 14 V

  3. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the main body ECU (multiplex network body ECU).

      A01V7TDC17
      *A Main Body ECU (Multiplex Network Body ECU) with 1 Connector - -
      *1 Main Body ECU (Multiplex Network Body ECU) - -
      *a 1 Connector - -
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      *A Main Body ECU (Multiplex Network Body ECU) with 3 Connectors - -
      *1 Main Body ECU (Multiplex Network Body ECU) - -
      *a 3 Connectors - -

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

      Terminal Connection Wiring Color Terminal Description Condition Specified Condition
      A-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-32 (IG) - Body ground - IG power supply Ignition switch ON

      11 to 14 V*1

      10.5 to 14 V*2
      A-32 (IG) - Body ground - IG power supply Ignition switch off Below 1 V
      A-29 (ACC) - Body ground - ACC power supply Ignition switch ACC 11 to 14 V
      A-29 (ACC) - Body ground - ACC power supply Ignition switch off Below 1 V
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω

      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

    3. Install the main body ECU (multiplex network body ECU).

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G78-19 (FRCY) - Body ground*1 L - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed Pulse generation
      3E-40 (FLCY) - Body ground*2 W - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed Pulse generation

      • *1: for RHD

      • *2: for LHD