REAR POWER SEAT CONTROL SYSTEM Rear Power Seat does not Operate with Rear Power Seat Switch

DESCRIPTION

Rear power seat switch signals are sent to the position control ECU through the LIN line. The position control ECU then operates each motor.

WIRING DIAGRAM

A01H1E9E14

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK REAR POWER SEAT MODULE SWITCH (RIGHT / LEFT SELECTION SWITCH)


    1. When the rear power seat switch's right / left selection switch is operated, check that the indicator illuminates.

      OK
      Indicator illuminates.
      Result
      Result Proceed to
      OK A
      NG (for Power Seat) B
      NG (for 4-Passenger with Ottoman) C
      NG (for 5-Passenger with Ottoman) D

    B

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    C

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    D

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    A

  2. CHECK REAR POWER SEAT CONTROL FUNCTION


    1. Operate the rear power seat switch and check that each power seat function operates normally.

      Result
      Result Proceed to
      Either right or left side does not operate A
      Some functions of right or left side do not operate B
      Both right and left side do not operate (for Power Seat) C
      Both right and left side do not operate (for 4-Passenger with Ottoman) D
      Both right and left side do not operate (for 5-Passenger with Ottoman) E

    B

    READ VALUE USING INTELLIGENT TESTER (REAR POWER SEAT MODULE SWITCH) Click here

    C

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    D

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    E

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    A

  3. INSPECT FUSE


    1. Inspect the fuse on the side that is not operating.


      1. Remove the RL SEAT fuse*1 from the luggage room junction block, or the RR SEAT fuse*2 from the passenger side junction block.

        Tech Tips

        *1: for LH side

        *2: for RH side

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

        Standard resistance
        Tester Connection Condition Specified Condition
        RL SEAT fuse Always Below 1 Ω
        RR SEAT fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  4. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU - BATTERY)


    1. A01GX3EE05

      Check the ECU on the side that is not operating.


      1. for LH Side:

        Disconnect the f24 ECU connector.

      2. for RH Side:

        Disconnect the f4 ECU connector.

      3. Measure the voltage according to the value(s) in the table below.

        Standard voltage
        for LH Side
        Tester Connection Condition Specified Condition
        f24-1 (+B) - Body ground Always 11 to 14 V
        for RH Side
        Tester Connection Condition Specified Condition
        f4-1 (+B) - Body ground Always 11 to 14 V
        Result
        Result Proceed to
        OK (for LH Side, except Ottoman) A
        OK (for LH Side, for Ottoman) B
        OK (for RH Side, except Ottoman) C
        OK (for RH Side, for Ottoman) D
        NG E

    B

    REPLACE POSITION CONTROL ECU LH Click here

    C

    REPLACE POSITION CONTROL ECU RH Click here

    D

    REPLACE POSITION CONTROL ECU RH Click here

    E

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POSITION CONTROL ECU LH Click here

  5. READ VALUE USING INTELLIGENT TESTER (REAR POWER SEAT MODULE SWITCH)


    1. Check the Data List for proper functioning of the rear power seat module switch.

      Rear Console Switch
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Rear Seat Slide Front SW Sliding switch signal (Forward) / ON or OFF

      ON: Sliding switch (Forward) is ON

      OFF: Sliding switch (Forward) is OFF

      		 -
      Rear Seat Slide Back SW Sliding switch signal (Rearward) / ON or OFF

      ON: Sliding switch (Rearward) is ON

      OFF: Sliding switch (Rearward) is OFF

      		 -
      Rear Seat Headrest Up SW Headrest switch signal (Upward) / ON or OFF

      ON: Headrest switch (Upward) is ON

      OFF: Headrest switch (Upward) is OFF

      		 -
      Rear Seat Headrest Down SW Headrest switch signal (Downward) / ON or OFF

      ON: Headrest switch (Downward) is ON

      OFF: Headrest switch (Downward) is OFF

      		 -
      Rear Seat Hollow Front SW Upper lumbar switch signal (Forward) / ON or OFF

      ON: Upper lumbar switch (Forward) is ON

      OFF: Upper lumbar switch (Forward) is OFF

      		 -
      Rear Seat Hollow Back SW Upper lumbar switch signal (Rearward) / ON or OFF

      ON: Upper lumbar switch (Rearward) is ON

      OFF: Upper lumbar switch (Rearward) is OFF

      		 -
      Rear Seat Reclining Front SW* Reclining switch signal (Forward) / ON or OFF

      ON: Reclining switch (Forward) is ON

      OFF: Reclining switch (Forward) is OFF

      		 -
      Rear Seat Reclining Back SW* Reclining switch signal (Rearward) / ON or OFF

      ON: Reclining switch (Rearward) is ON

      OFF: Reclining switch (Rearward) is OFF

      		 -
      Rear Seat Ottoman Up SW* Ottoman switch signal (Upward) / ON or OFF

      ON: Ottoman switch (Upward) is ON

      OFF: Ottoman switch (Upward) is OFF

      		 -
      Rear Seat Ottoman Down SW* Ottoman switch signal (Downward) / ON or OFF

      ON: Ottoman switch (Downward) is ON

      OFF: Ottoman switch (Downward) is OFF

      		 -

      Tech Tips

      *: for Ottoman

      OK
      On tester screen, each item changes between ON and OFF according to above chart.
      Result
      Result Proceed to
      OK (except Ottoman) A
      OK (for Ottoman) B
      NG (for Power Seat) C
      NG (for 4-Passenger with Ottoman) D
      NG (for 5-Passenger with Ottoman) E

    B

    REPLACE POSITION CONTROL ECU Click here

    C

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    D

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    E

    REPLACE REAR POWER SEAT MODULE SWITCH Click here

    A

    REPLACE POSITION CONTROL ECU Click here