FRONT POWER SEAT CONTROL SYSTEM One or more Power Seat Motors do not Operate

DESCRIPTION

When the front power seat switch is operated, a command signal is sent to the power seat switch. The power seat switch then controls the appropriate seat motor as needed. The power seat switch is designed so that a malfunction of the seat memory system will not interfere with manual seat control.

WIRING DIAGRAM

A01WPBNE05
A01WPBNE08

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK FRONT POWER SEAT OPERATION


    1. Check that each function of the power seat operates normally by using the front power seat switches.

      Result
      Result Proceed to
      All front power seat switch operations are malfunctioning except lumbar support switch and seat variable cushion switch operation A
      Only lumbar support switch operation is malfunctioning B
      Only seat variable cushion switch operation is malfunctioning C

    B

    INSPECT LUMBAR SUPPORT SWITCH Click here

    C

    INSPECT SEAT VARIABLE CUSHION SWITCH Click here

    A

  2. READ VALUE USING GTS (FRONT POWER SEAT SWITCH)


    1. Using the GTS, read the Data List.

      Driver Seat
      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      Reclining Rear Reclining switch signal (Rearward) / ON or OFF

      ON: Reclining switch (Rearward) on

      OFF: Reclining switch (Rearward) off

      		 -
      Reclining Front Reclining switch signal (Forward) / ON or OFF

      ON: Reclining switch (Forward) on

      OFF: Reclining switch (Forward) off

      		 -
      Front Vertical Down Front vertical switch signal (Downward) / ON or OFF

      ON: Front vertical switch (Downward) on

      OFF: Front vertical switch (Downward) off

      		 -
      Front Vertical Up Front vertical switch signal (Upward) / ON or OFF

      ON: Front vertical switch (Upward) on

      OFF: Front vertical switch (Upward) off

      		 -
      Lifter Switch Down Lifter switch signal (Downward) / ON or OFF

      ON: Lifter switch (Downward) on

      OFF: Lifter switch (Downward) off

      		 -
      Lifter Switch Up Lifter switch signal (Upward) / ON or OFF

      ON: Lifter switch (Upward) on

      OFF: Lifter switch (Upward) off

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

      ON: Sliding switch (Rearward) on

      OFF: Sliding switch (Rearward) off

      		 -
      Slide Front Sliding switch signal (Forward) / ON or OFF

      ON: Sliding switch (Forward) on

      OFF: Sliding switch (Forward) off

      		 -
      OK
      On GTS screen, each item changes between ON and OFF according to above chart.

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  3. PERFORM ACTIVE TEST USING GTS (FRONT POWER SEAT MOTOR)


    1. Using the GTS, perform the Active Test.

      Driver Seat
      Tester Display Test Part Control Range Diagnostic Note
      Seat Reclining Seat reclining operation Front / OFF / Rear -
      Front Vertical Operation Seat front vertical operation Up / OFF / Down -
      Lifter Operation Seat lifter operation Up / OFF / Down -
      Seat Slide Operation Seat sliding operation Front / OFF / Rear -
      OK
      The power seat motors operate normally.

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

  4. INSPECT FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY (FRONT POWER SEAT MOTOR)


    1. Remove the front seat with adjuster frame LH (for LHD) Click here.

    2. Remove the front seat with adjuster frame RH (for RHD) Click here.

    3. A01WU4GE42

      Check operation of the slide motor.


      1. Check if the seat moves smoothly when the battery is connected to the slide motor connector terminals.

        OK
        for LHD
        Measurement Condition Specified Condition

        Battery positive (+) → 3 (FWD)

        Battery negative (-) → 4 (BACK)

        		 Forward

        Battery positive (+) → 4 (BACK)

        Battery negative (-) → 3 (FWD)

        		 Rearward
        for RHD
        Measurement Condition Specified Condition

        Battery positive (+) → 4 (FWD)

        Battery negative (-) → 3 (BACK)

        		 Forward

        Battery positive (+) → 3 (BACK)

        Battery negative (-) → 4 (FWD)

        		 Rearward
    4. A01WRKUE03
      *1 Component without harness connected: (Front Vertical Motor)

      Check operation of the front vertical motor.


      1. Check if the seat moves smoothly when the battery is connected to the front vertical motor connector terminals.

        OK
        for LHD
        Measurement Condition Specified Condition

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Upward

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Downward
        for RHD
        Measurement Condition Specified Condition

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Upward

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Downward
    5. A01WRKUE04
      *1 Component without harness connected: (Lifter Motor)

      Check operation of the lifter motor.


      1. Check if the seat moves smoothly when the battery is connected to the lifter motor connector terminals.

        OK
        for LHD
        Measurement Condition Specified Condition

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Upward

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Downward
        for RHD
        Measurement Condition Specified Condition

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Upward

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Downward
    6. A01WRKUE05
      *1 Component without harness connected: (Reclining Motor)

      Check operation of the reclining motor.


      1. Check if the seat moves smoothly when the battery is connected to the reclining motor connector terminals.

        OK
        Measurement Condition Specified Condition

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Forward

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Rearward
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY LH Click here

    C

    REPLACE FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY RH Click here

    A

  5. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - POWER SEAT MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the c62*1 or c57*2 front power seat switch connector.

    2. Disconnect the c18*1, c19*1, c20*1, c64*1 or c4*2, c5*2, c6*2, c59*2 motor connectors.

      A01WWWDE01

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      c62-4 (SLD-) - c64-4 (BACK) Always Below 1 Ω
      c62-2 (SLD+) - c64-3 (FWD) Always Below 1 Ω
      c62-5 (FRV-) - c19-2 Always Below 1 Ω
      c62-7 (FRV+) - c19-1 Always Below 1 Ω
      c62-11 (LFT-) - c18-1 Always Below 1 Ω
      c62-8 (LFT+) - c18-2 Always Below 1 Ω
      c62-12 (RCL-) - c20-1 Always Below 1 Ω
      c62-9 (RCL+) - c20-2 Always Below 1 Ω
      c62-1 (GND) - Body ground Always Below 1 Ω
      c62-4 (SLD-) - Body ground Always 10 kΩ or higher
      c62-2 (SLD+) - Body ground Always 10 kΩ or higher
      c62-5 (FRV-) - Body ground Always 10 kΩ or higher
      c62-7 (FRV+) - Body ground Always 10 kΩ or higher
      c62-11 (LFT-) - Body ground Always 10 kΩ or higher
      c62-8 (LFT+) - Body ground Always 10 kΩ or higher
      c62-12 (RCL-) - Body ground Always 10 kΩ or higher
      c62-9 (RCL+) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      c57-4 (SLDR) - c59-3 (BACK) Always Below 1 Ω
      c57-2 (SLDF) - c59-4 (FWD) Always Below 1 Ω
      c57-5 (FDWN) - c5-1 Always Below 1 Ω
      c57-7 (FUP) - c5-2 Always Below 1 Ω
      c57-11 (LDWN) - c4-2 Always Below 1 Ω
      c57-8 (LUP) - c4-1 Always Below 1 Ω
      c57-12 (RCLR) - c6-1 Always Below 1 Ω
      c57-9 (RCLF) - c6-2 Always Below 1 Ω
      c57-1 (GND2) - Body ground Always Below 1 Ω
      c57-4 (SLDR) - Body ground Always 10 kΩ or higher
      c57-2 (SLDF) - Body ground Always 10 kΩ or higher
      c57-5 (FDWN) - Body ground Always 10 kΩ or higher
      c57-7 (FUP) - Body ground Always 10 kΩ or higher
      c57-11 (LDWN) - Body ground Always 10 kΩ or higher
      c57-8 (LUP) - Body ground Always 10 kΩ or higher
      c57-12 (RCLR) - Body ground Always 10 kΩ or higher
      c57-9 (RCLF) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT LUMBAR SUPPORT SWITCH

    A01WSOTE01

    1. Remove the lumbar support switch Click here.

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      3 (B) - 4 (H) Hold Below 1 Ω
      1 (R) - 2 (E2)
      4 (H) - 5 (E2) Off
      1 (R) - 2 (E2)
      4 (H) - 5 (E2) Release
      1 (R) - 3 (B)
      for RHD
      Tester Connection Switch Condition Specified Condition
      3 (B) - 4 (H) Hold Below 1 Ω
      1 (R) - 2 (E)
      4 (H) - 5 (E) Off
      1 (R) - 2 (E)
      4 (H) - 5 (E) Release
      1 (R) - 3 (B)

    NG

    REPLACE LUMBAR SUPPORT SWITCH Click here

    OK

  7. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY

    A01WV5IE06
    *1 Component without harness connected: (Lumbar Support Adjuster)
    *2 Counterclockwise
    *3 Clockwise
    *4 Driving Axis

    1. Remove the lumbar support adjuster Click here.

    2. Check operation of the lumbar support adjuster.


      1. Check that the lumbar support adjuster moves smoothly when the battery is connected to the lumbar support adjuster motor connector terminals.

        OK
        for LHD
        Measurement Condition Specified Condition

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Clockwise

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Counterclockwise
        for RHD
        Measurement Condition Specified Condition

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Clockwise

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Counterclockwise

    NG

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (LUMBAR SUPPORT SWITCH - BATTERY AND BODY GROUND)


    1. A01WQHYE01

      Disconnect the c16*1 or c30*2 lumbar support switch connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      c16-3 (B) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      c30-3 (B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      c16-5 (E2) - Body ground Always Below 1 Ω
      c16-2 (E2) - Body ground
      for RHD
      Tester Connection Condition Specified Condition
      c30-5 (E) - Body ground Always Below 1 Ω
      c30-2 (E) - Body ground

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (LUMBAR SUPPORT SWITCH - LUMBAR SUPPORT ADJUSTER ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. INSPECT SEAT VARIABLE CUSHION SWITCH

    A01WPJWE01

    1. Remove the seat variable cushion switch Click here.

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      2 (+B) - 5 (CSNF) Front Below 1 Ω
      3 (CSNR) - 4 (E)
      3 (CSNR) - 4 (E) Off
      1 (E) - 5 (CSNF)
      2 (+B) - 3 (CSNR) Rear
      1 (E) - 5 (CSNF)
      for RHD
      Tester Connection Switch Condition Specified Condition
      2 (+B) - 3 (CSNF) Front Below 1 Ω
      5 (CSNR) - 4 (E)
      3 (CSNF) - 1 (E2) Off
      5 (CSNR) - 4 (E)
      2 (+B) - 5 (CSNR) Rear
      3 (CSNF) - 1 (E2)

    NG

    REPLACE SEAT VARIABLE CUSHION SWITCH Click here

    OK

  10. INSPECT FRONT SEAT ASSEMBLY (VARIABLE MOTOR)


    1. A01WRKUE06
      *1 Component without harness connected: (Variable Motor)

      Remove the front seat with adjuster frame LH (for LHD) Click here.

    2. Remove the front seat with adjuster frame RH (for RHD) Click here.

    3. Check operation of the variable motor.


      1. Check if the seat cushion moves smoothly when the battery is connected to the variable motor connector terminals.

        OK
        for LHD
        Measurement Condition Specified Condition

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Forward

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Rearward
        for RHD
        Measurement Condition Specified Condition

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Forward

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Rearward
        Result
        Result Proceed to
        OK A
        NG (for LHD) B
        NG (for RHD) C

    B

    REPLACE FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY LH Click here

    C

    REPLACE FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY RH Click here

    A

  11. CHECK HARNESS AND CONNECTOR (SEAT VARIABLE CUSHION SWITCH - BATTERY AND BODY GROUND)

    A01WU4NE01

    1. Disconnect the c52*1 or c69*2 seat variable cushion switch connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      c52-2 (+B) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      c69-2 (+B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      c52-1 (E) - Body ground Always Below 1 Ω
      c52-4 (E) - Body ground
      for RHD
      Tester Connection Condition Specified Condition
      c69-1 (E2) - Body ground Always Below 1 Ω
      c69-4 (E) - Body ground

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SEAT VARIABLE CUSHION SWITCH - VARIABLE MOTOR)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR