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

DESCRIPTION

Signals are input into the front power seat switch LH*1 or RH*2. The built-in ECU manages the signals received from the front power seat switch LH*1 or RH*2, and operates each motor. If the front power seat switch LH*1 or RH*2 receives more than 2 motor operation signals, the motor is stopped. Manual operation is restarted after the front power seat switch LH*1 or RH*2 receives 1 signal only.


WIRING DIAGRAM

Figure 1. for LHD

B006LS5E03

Figure 2. for RHD

B006LS5E02

CAUTION / NOTICE / HINT

Tech Tips

If DTC B2650, B2651, B2652, B2653 or B2658 is output, first perform troubleshooting these DTCs.

PROCEDURE


  1. CHECK FRONT POWER SEAT OPERATION


    • *1: for LHD

    • *2: for RHD


    1. Check that each function of the power seat operates normally by using the front power seat switch LH*1 or RH*2.

      Click here

      Result
      Result Proceed to
      All power seat functions do not operate A
      Only slide function does not operate B
      Only front vertical function does not operate C
      Only rear lifter function does not operate D
      Only reclining function does not operate E

    A

    GO TO OTHER DIAGNOSIS PROCEDURE (Front Power Seat does not Operate with Front Power Seat Switch) Click here

    C

    READ VALUE USING GTS (FRONT VERTICAL DOWN, FRONT VERTICAL UP) Click here

    D

    READ VALUE USING GTS (LIFTER SWITCH DOWN, LIFTER SWITCH UP) Click here

    E

    READ VALUE USING GTS (RECLINING REAR, RECLINING FRONT) Click here

    B

  2. READ VALUE USING GTS (SLIDE REAR, SLIDE FRONT)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Driver Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Slide Rear Slide switch signal (Rearward) ON or OFF

      ON: Slide switch (Rearward) on

      OFF: Slide switch (Rearward) off

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

      ON: Slide switch (Forward) on

      OFF: Slide switch (Forward) off

      		 -

      Body Electrical > Driver Seat > Data List
      Tester Display
      Slide Rear
      Slide Front
      OK
      The GTS display changes correctly in response to the switch operation.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  3. PERFORM ACTIVE TEST USING GTS (SEAT SLIDE OPERATION)


    1. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    2. Perform the Active Test according to the display on the GTS.


      Body Electrical > Driver Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Seat Slide Operation Seat slide operation OFF/Rear/Front -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Seat Slide Operation
      OK
      Front seat assembly is moved normally using the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

  4. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Remove the front seat adjuster assembly LH*1 or RH*2.

      Click here

    2. Inspect the front seat adjuster assembly LH*1 or RH*2.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

    OK

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W19*1 or W6*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W14*1 or W1*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W19-3 (SLD+) - W14-4 Always Below 1 Ω
      W19-3 (SLD+) or W14-4 - Body ground Always 10 kΩ or higher
      W19-4 (SLD-) - W14-1 Always Below 1 Ω
      W19-4 (SLD-) or W14-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W6-3 (SLD+) - W1-1 Always Below 1 Ω
      W6-3 (SLD+) or W1-1 - Body ground Always 10 kΩ or higher
      W6-4 (SLD-) - W1-4 Always Below 1 Ω
      W6-4 (SLD-) or W1-4 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. READ VALUE USING GTS (FRONT VERTICAL DOWN, FRONT VERTICAL UP)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Driver Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      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

      		 -

      Body Electrical > Driver Seat > Data List
      Tester Display
      Front Vertical Down
      Front Vertical Up
      OK
      The GTS display changes correctly in response to the switch operation.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  7. PERFORM ACTIVE TEST USING GTS (FRONT VERTICAL OPERATION)


    1. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    2. Perform the Active Test according to the display on the GTS.


      Body Electrical > Driver Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Front Vertical Operation Seat front vertical operation OFF/Down/Up -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Front Vertical Operation
      OK
      Front seat assembly is moved normally using the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

  8. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (FRONT VERTICAL MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Remove the front seat adjuster assembly LH*1 or RH*2.

      Click here

    2. Inspect the front seat adjuster assembly LH*1 or RH*2.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

    OK

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W19*1 or W6*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W15*1 or W2*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W19-8 (FRV+) - W15-4 Always Below 1 Ω
      W19-8 (FRV+) or W15-4 - Body ground Always 10 kΩ or higher
      W19-5 (FRV-) - W15-1 Always Below 1 Ω
      W19-5 (FRV-) or W15-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W6-8 (FRV+) - W2-4 Always Below 1 Ω
      W6-8 (FRV+) or W2-4 - Body ground Always 10 kΩ or higher
      W6-5 (FRV-) - W2-1 Always Below 1 Ω
      W6-5 (FRV-) or W2-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. READ VALUE USING GTS (LIFTER SWITCH DOWN, LIFTER SWITCH UP)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Driver Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      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

      		 -

      Body Electrical > Driver Seat > Data List
      Tester Display
      Lifter Switch Down
      Lifter Switch Up
      OK
      The GTS display changes correctly in response to the switch operation.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  11. PERFORM ACTIVE TEST USING GTS (LIFTER OPERATION)


    1. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    2. Perform the Active Test according to the display on the GTS.


      Body Electrical > Driver Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Lifter Operation Seat lifter operation OFF/Down/Up -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lifter Operation
      OK
      Front seat assembly is moved normally using the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

  12. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (REAR LIFTER MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Remove the front seat adjuster assembly LH*1 or RH*2.

      Click here

    2. Inspect the front seat adjuster assembly LH*1 or RH*2.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - REAR LIFTER MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W19*1 or W6*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W16*1 or W3*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W19-10 (LFT+) - W16-1 Always Below 1 Ω
      W19-10 (LFT+) or W16-1 - Body ground Always 10 kΩ or higher
      W19-12 (LFT-) - W16-4 Always Below 1 Ω
      W19-12 (LFT-) or W16-4 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W6-10 (LFT+) - W3-1 Always Below 1 Ω
      W6-10 (LFT+) or W3-1 - Body ground Always 10 kΩ or higher
      W6-12 (LFT-) - W3-4 Always Below 1 Ω
      W6-12 (LFT-) or W3-4 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. READ VALUE USING GTS (RECLINING REAR, RECLINING FRONT)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Driver Seat > Data List
      Tester Display Measurement Item 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

      		 -

      Body Electrical > Driver Seat > Data List
      Tester Display
      Reclining Rear
      Reclining Front
      OK
      The GTS display changes correctly in response to the switch operation.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  15. PERFORM ACTIVE TEST USING GTS (SEAT RECLINING)


    1. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    2. Perform the Active Test according to the display on the GTS.


      Body Electrical > Driver Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Seat Reclining Seat reclining operation OFF/Rear/Front -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Seat Reclining
      OK
      Front seat assembly is moved normally using the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

  16. INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY (RECLINING MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Remove the front seatback frame sub-assembly LH*1 or RH*2.

      Click here

    2. Inspect the front seatback frame sub-assembly LH*1 or RH*2.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEATBACK FRAME SUB-ASSEMBLY Click here

    OK

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W19*1 or W6*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the X7*1 or X1*2 front seatback frame sub-assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W19-9 (RCL+) - X7-1 Always Below 1 Ω
      W19-9 (RCL+) or X7-1 - Body ground Always 10 kΩ or higher
      W19-11 (RCL-) - X7-4 Always Below 1 Ω
      W19-9 (RCL-) or X7-4 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W6-9 (RCL+) - X1-1 Always Below 1 Ω
      W6-9 (RCL+) or X1-1 - Body ground Always 10 kΩ or higher
      W6-11 (RCL-) - X1-4 Always Below 1 Ω
      W6-11 (RCL-) or X1-4 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR