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

  1. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY

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

      B219506N07

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      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 (GND1)

      W - W-B

      Battery supply

      Always

      11 to 14 V

      e6-12 (SYSB) - e18-2 (GND1)

      P - W-B

      System power supply

      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 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

      e6-1 (SGND) - e18-2 (GND1)

      BR - W-B

      Position sensor round

      Always

      Below 1 Ω

      e6-3 (SSFV) - e6-1 (SGND)

      R - BR

      Front vertical position signal

      Front vertical function operating

      4.5 to 4.8 V

      e6-4 (SSRL) - e6-1 (SGND)

      P - BR

      Lifter position signal

      Lifter function operating

      4.5 to 4.8 V

      e6-5 (SSRS) - e6-1 (SGND)

      G- BR

      Slide position signal

      Slide function operating

      4.5 to 4.8 V

      e6-11 (SSRR) - e6-1 (SGND)

      V - BR

      Reclining position signal

      Reclining function operating

      4.5 to 4.8 V

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

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

      B332798C17

      *A

      Main Body ECU (Multiplex Network Body ECU) with 1 Connector

      -

      -

      *1

      Main Body ECU (Multiplex Network Body ECU)

      -

      -

      *a

      1 Connector

      -

      -
      B332799C16

      *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.

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      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

      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

      A-2 (FLCY) - Body ground

      -

      Front door courtesy light switch LH input

      Front door LH closed (OFF) → open (ON)

      10 kΩ or higher → Below 1 Ω

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