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

DESCRIPTION

Signals are input into the position control ECU assembly. The built-in ECU manages the signals received from the position control ECU assembly, and operates each motorand each bladder. If the position control ECU assembly receives more than 2 motor or bladder operation signals, the motor or bladder is stopped. Manual operation is restarted after the position control ECU assembly receives 1 signal only.

WIRING DIAGRAM


  1. for Driver Seat:

    Figure 1. for LHD:

    B006FGVE13
    B006EARE07

    Figure 2. for RHD:

    B006FGVE14
    B006EARE08

  2. for Front Passenger Seat

    Figure 3. for LHD:

    B006FGVE15
    B006EARE06

    Figure 4. for RHD:

    B006FGVE16
    B006EARE04

CAUTION / NOTICE / HINT

Note


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

  • Initializing the position control ECU assembly will clear the seat position memory.

Tech Tips


  • Make sure to initialize the position control ECU assembly after replacing the seat assembly or any related parts (including removal and installation).

  • Before initializing the seat ECU, make sure that the D/C CUT fuse is normal.

  • When any of the following conditions are met, the seat position Information in the position control ECU assembly will be cleared.


    • The engine switch is turned off with any of the seat switches being operated and the D/C CUT fuse removed.

    • The engine switch is turned off within 1 second of any of the seat switches being operated with the D/C CUT fuse removed.

PROCEDURE


  1. CHECK FRONT POWER SEAT OPERATION


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

      Click here

      Result
      Result Proceed to
      Driver power seat functions do not operate A
      Front passenger power seat functions do not operate B

    B

    CHECK FRONT POWER SEAT OPERATION Click here

    A

  2. CHECK FRONT POWER SEAT OPERATION


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

      Click here

      Result
      Result Proceed to
      One or more power seat functions do not operate A
      All power seat functions do not operate B

    B

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

    A

  3. READ VALUE USING GTS (POWER SEAT SWITCH)


    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

      		 -
      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 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

      		 -
      Lumbar Switch UP Lumbar support adjuster switch signal (upward) ON or OFF

      ON: Lumbar support adjuster switch (upward) on

      OFF: Lumbar support adjuster switch (upward) off

      		 -
      Lumbar Switch Down Lumbar support adjuster switch signal (downward) ON or OFF

      ON: Lumbar support adjuster switch (downward) on

      OFF: Lumbar support adjuster switch (downward) off

      		 -
      Lumbar Switch Front Lumbar support adjuster switch signal (forward) ON or OFF

      ON: Lumbar support adjuster switch (forward) on

      OFF: Lumbar support adjuster switch (forward) off

      		 -
      Lumbar Switch Rear Lumbar support adjuster switch signal (rearward) ON or OFF

      ON: Lumbar support adjuster switch (rearward) on

      OFF: Lumbar support adjuster switch (rearward) off

      		 -
      Cushion Length Front Cushion length switch signal (forward) ON or OFF

      ON: Cushion length switch (forward) on

      OFF: Cushion length switch (forward) off

      		 -
      Cushion Length Rear Cushion length switch signal (rearward) ON or OFF

      ON: Cushion length switch (rearward) on

      OFF: Cushion length switch (rearward) off

      		 -

      Body Electrical > Driver Seat > Data List
      Tester Display
      Reclining Rear
      Reclining Front
      Front Vertical Down
      Front Vertical Up
      Lifter Switch Down
      Lifter Switch Up
      Slide Rear
      Slide Front
      Lumbar Switch UP
      Lumbar Switch Down
      Lumbar Switch Front
      Lumbar Switch Rear
      Cushion Length Front
      Cushion Length Rear
      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 6 Click here

    OK

  4. PERFORM ACTIVE TEST USING GTS (POWER SEAT MOTOR)


    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 -
      Front Vertical Operation Seat front vertical operation OFF/Down/Up -
      Lifter Operation Seat lifter operation OFF/Down/Up -
      Seat Slide Operation Seat slide operation OFF/Rear/Front -
      Cushion Length Seat cushion length operation OFF/Rear/Front -
      Headrest Operation Headrest up/down operation OFF/Down/Up -
      Headrest Front/Rear Headrest front/rear operation OFF/Rear/Front -
      Lumbar Upper Pneumatic support function (lumbar upper) operation OFF/Intake/Exhaust -
      Lumbar Middle Pneumatic support function (lumbar middle) operation OFF/Intake/Exhaust -
      Lumbar Bottom Pneumatic support function (lumbar bottom) operation OFF/Intake/Exhaust -
      Lower Back Pneumatic support function (lower back) operation OFF/Intake/Exhaust -
      Lower Cushion Pneumatic support function (lower cushion) operation OFF/Intake/Exhaust -
      Shoulder Pneumatic support function (shoulder) operation OFF/Intake/Exhaust -
      Side Back Support Pneumatic support function (side back) operation OFF/Intake/Exhaust -
      Side Cushion Support Pneumatic support function (side cushion) operation OFF/Intake/Exhaust -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Seat Reclining

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Front Vertical Operation

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lifter Operation

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Seat Slide Operation

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Cushion Length

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Headrest Operation

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Headrest Front/Rear

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lumbar Upper

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lumbar Middle

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lumbar Bottom

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lower Back

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lower Cushion

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Shoulder

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Side Back Support

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Side Cushion Support
      Result
      Result Proceed to
      The power seat functions operate normally. A
      Slide, front vertical, rear lifter or cushon length function does not operate normally. B
      Reclining function does not operate normally. C
      Headrest adjuster function does not operate normally. D
      Lumbar support function does not operate normally. E

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

    INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY (RECLINING MOTOR) Click here

    D

    INSPECT FRONT SEAT HEADREST INSERT SUB-ASSEMBLY (HEADREST UP/DOWN MOTOR) Click here

    E

    INSPECT LUMBAR SUPPORT PUMP SUB-ASSEMBLY Click here

    B

  5. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (SLIDE, FRONT TILT, REAR LIFTER, CUSHION MOTOR)


    1. Remove the front seat adjuster assembly (slide, front tilt, rear lifter, cushion motor).

      Click here

    2. Inspect the front seat adjuster assembly (slide, front tilt, rear lifter, cushion motor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

    OK

  6. INSPECT FRONT POWER SEAT SWITCH


    1. Remove the front power seat switch.

      Click here

    2. Inspect the front power seat switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  7. CHECK HARNESS OR CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT POWER SEAT SWITCH)


    1. for LHD:


      1. Disconnect the position control ECU assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-17 (SYSG) - Body ground Always Below 1 Ω

      3. Measuer the voltagee according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        Q28-18 (SYSB) - Body ground always 11 to 14 V

    2. for RHD:


      1. Disconnect the position control ECU assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-17 (SYSG) - Body ground Always Below 1 Ω

      3. Measuer the voltagee according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        Q8-18 (SYSB) - Body ground always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS OR CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT POWER SEAT SWITCH)


    1. for LHD:


      1. Disconnect the Q27 position control ECU assembly connector.

      2. Disconnect the Q29 front power saet switch LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q27-20 (SLDR) - Q29-6 (SLDR) Always Below 1 Ω
        Q27-20 (SLDR) or Q29-6 (SLDR) - Other terminals and body ground Always 10 kΩ or higher
        Q27-19 (SLDF) - Q29-7 (SLDF) Always Below 1 Ω
        Q27-19 (SLDF) or Q29-7 (SLDF) - Other terminals and body ground Always 10 kΩ or higher
        Q27-11 (RCLR) - Q29-1 (RCLR) Always Below 1 Ω
        Q27-11 (RCLR) or Q29-1 (RCLR) - Other terminals and body ground Always 10 kΩ or higher
        Q27-3 (RCLF) - Q29-2 (RCLF) Always Below 1 Ω
        Q27-3 (RCLF) or Q29-2 (RCLF) - Other terminals and body ground Always 10 kΩ or higher
        Q27-12 (FRVU) - Q29-4 (FUP) Always Below 1 Ω
        Q27-12 (FRVU) or Q29-4 (FUP) - Other terminals and body ground Always 10 kΩ or higher
        Q27-21 (FRVD) - Q29-5 (FDWN) Always Below 1 Ω
        Q27-21 (FRVD) or Q29-5 (FDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q27-9 (LFTU) - Q29-3 (LUP) Always Below 1 Ω
        Q27-9 (LFTU) or Q29-3 (LUP) - Other terminals and body ground Always 10 kΩ or higher
        Q27-10 (LFTD) - Q29-8 (LDWN) Always Below 1 Ω
        Q27-10 (LFTD) or Q29-8 (LDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q27-14 (LFLF) - Q29-14 (H) Always Below 1 Ω
        Q27-14 (LFLF) or Q29-14 (H) - Other terminals and body ground Always 10 kΩ or higher
        Q27-22 (LFLR) - Q29-17 (R) Always Below 1 Ω
        Q27-22 (LFLR) or Q29-17 (R) - Other terminals and body ground Always 10 kΩ or higher
        Q27-4 (LVU) - Q29-11 (UP) Always Below 1 Ω
        Q27-4 (LVU) or Q29-11 (UP) - Other terminals and body ground Always 10 kΩ or higher
        Q27-13 (LVD) - Q29-9 (DOWN) Always Below 1 Ω
        Q27-13 (LVD) or Q29-9 (DOWN) - Other terminals and body ground Always 10 kΩ or higher
        Q27-7 (CUSF) - Q29-13 (CSNF) Always Below 1 Ω
        Q27-7 (CUSF) or Q29-13 (CSNF) - Other terminals and body ground Always 10 kΩ or higher
        Q27-8 (CUSR) - Q29-12 (CSNR) Always Below 1 Ω
        Q27-8 (CUSR) or Q29-12 (CSNR) - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q7 position control ECU assembly connector.

      2. Disconnect the Q9 front power saet switch RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q7-20 (SLDR) - Q9-5 (SLDR) Always Below 1 Ω
        Q7-20 (SLDR) or Q9-5 (SLDR) - Other terminals and body ground Always 10 kΩ or higher
        Q7-19 (SLDF) - Q9-4 (SLDF) Always Below 1 Ω
        Q7-19 (SLDF) or Q9-4 (SLDF) - Other terminals and body ground Always 10 kΩ or higher
        Q7-11 (RCLR) - Q9-10 (RCLR) Always Below 1 Ω
        Q7-11 (RCLR) or Q9-10 (RCLR) - Other terminals and body ground Always 10 kΩ or higher
        Q7-3 (RCLF) - Q9-9 (RCLF) Always Below 1 Ω
        Q7-3 (RCLF) or Q9-9 (RCLF) - Other terminals and body ground Always 10 kΩ or higher
        Q7-12 (FRVU) - Q9-7 (FUP) Always Below 1 Ω
        Q7-12 (FRVU) or Q9-7 (FUP) - Other terminals and body ground Always 10 kΩ or higher
        Q7-20 (FRVD) - Q9-6 (FDWN) Always Below 1 Ω
        Q7-20 (FRVD) or Q9-6 (FDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q7-9 (LFTU) - Q9-8 (LUP) Always Below 1 Ω
        Q7-9 (LFTU) or Q9-8 (LUP) - Other terminals and body ground Always 10 kΩ or higher
        Q7-10 (LFTD) - Q9-3 (LDWN) Always Below 1 Ω
        Q7-10 (LFTD) or Q9-3 (LDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q7-14 (LFLF) - Q9-17 (H) Always Below 1 Ω
        Q7-14 (LFLF) or Q9-17 (H) - Other terminals and body ground Always 10 kΩ or higher
        Q7-22 (LFLR) - Q9-14 (R) Always Below 1 Ω
        Q7-22 (LFLR) or Q9-14 (R) - Other terminals and body ground Always 10 kΩ or higher
        Q7-4 (LVU) - Q9-20 (UP) Always Below 1 Ω
        Q7-4 (LVU) or Q9-20 (UP) - Other terminals and body ground Always 10 kΩ or higher
        Q7-13 (LVD) - Q9-2 (DOWN) Always Below 1 Ω
        Q7-13 (LVD) or Q9-2 (DOWN) - Other terminals and body ground Always 10 kΩ or higher
        Q7-7 (CUSF) - Q9-18 (CSNF) Always Below 1 Ω
        Q7-7 (CUSF) or Q9-18 (CSNF) - Other terminals and body ground Always 10 kΩ or higher
        Q7-8 (CUSR) - Q9-19 (CSNR) Always Below 1 Ω
        Q7-8 (CUSR) or Q9-19 (CSNR) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - POWER SEAT MOTOR)


    1. for LHD:


      1. Disconnect the Q25, Q26 and Q28 position control ECU assembly connectors.

      2. Disconnect the Q21 front seat adjuster assembly LH (slide motor) connector.

      3. Disconnect the Q23 front seat adjuster assembly LH (front tilt motor) connector.

      4. Disconnect the Q22 front seat adjuster assembly LH (rear lifter motor) connector.

      5. Disconnect the Q24 front seat adjuster assembly LH (cushion motor) connector.

      6. Disconnect the S15 front seatback frame sub-assembly LH (reclining motor) connector.

      7. Disconnect the S17 front seat headrest insert sub-assembly LH (headrest up/down, front/rear motor) connector.

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

        Standard Resistance
        Slide Motor
        Tester Condition Condition Specified Condition
        Q28-5 (SLD+) - Q21-4 Always Below 1 Ω
        Q28-5 (SLD+) or Q21-4 - Other terminals and body ground Always 10 kΩ or higher
        Q28-6 (SLD-) - Q21-1 Always Below 1 Ω
        Q28-6 (SLD-) or Q21-1 - Other terminals and body ground Always 10 kΩ or higher
        Front Tilt Motor
        Tester Condition Condition Specified Condition
        Q26-7 (FRV+) - Q23-1 Always Below 1 Ω
        Q26-7 (FRV+) or Q23-1 - Other terminals and body ground Always 10 kΩ or higher
        Q26-6 (FRV-) - Q23-4 Always Below 1 Ω
        Q26-6 (FRV-) or Q23-4 - Other terminals and body ground Always 10 kΩ or higher
        Rear Lifter Motor
        Tester Condition Condition Specified Condition
        Q26-9 (LFT+) - Q22-1 Always Below 1 Ω
        Q26-9 (LFT+) or Q22-1 - Other terminals and body ground Always 10 kΩ or higher
        Q26-2 (LFT-) - Q22-4 Always Below 1 Ω
        Q26-2 (LFT-) or Q22-4 - Other terminals and body ground Always 10 kΩ or higher
        Cushion Motor
        Tester Condition Condition Specified Condition
        Q26-3 (CUS+) - Q24-4 Always Below 1 Ω
        Q26-3 (CUS+) or Q24-4 - Other terminals and body ground Always 10 kΩ or higher
        Q26-1 (CUS-) - Q24-1 Always Below 1 Ω
        Q26-1 (CUS-) or Q24-1 - Other terminals and body ground Always 10 kΩ or higher
        Reclining Motor
        Tester Condition Condition Specified Condition
        Q26-8 (RCL+) - S15-1 Always Below 1 Ω
        Q26-8 (RCL+) or S15-1 - Other terminals and body ground Always 10 kΩ or higher
        Q26-5 (RCL-) - S15-4 Always Below 1 Ω
        Q26-5 (RCL-) or S15-4 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Up/Down Motor
        Tester Condition Condition Specified Condition
        Q25-5 (H+) - S17-4 Always Below 1 Ω
        Q25-5 (H+) or S17-4 - Other terminals and body ground Always 10 kΩ or higher
        Q25-4 (H-) - S17-1 Always Below 1 Ω
        Q25-4 (H-) or S17-1 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Front/Rear Motor
        Tester Condition Condition Specified Condition
        Q25-6 (HD+) - S17-5 Always Below 1 Ω
        Q25-6 (HD+) or S17-5 - Other terminals and body ground Always 10 kΩ or higher
        Q25-3 (HD-) - S17-8 Always Below 1 Ω
        Q25-3 (HD-) or S17-8 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q5, Q6 and Q8 position control ECU assembly connectors.

      2. Disconnect the Q1 front seat adjuster assembly RH (slide motor) connector.

      3. Disconnect the Q2 front seat adjuster assembly RH (front tilt motor) connector.

      4. Disconnect the Q3 front seat adjuster assembly RH (rear lifter motor) connector.

      5. Disconnect the Q4 front seat adjuster assembly RH (cushion motor) connector.

      6. Disconnect the S1 front seatback frame sub-assembly rH (reclining motor) connector.

      7. Disconnect the S9 front seat headrest insert sub-assembly rH (headrest up/down, front/rear motor) connector.

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

        Standard Resistance
        Slide Motor
        Tester Condition Condition Specified Condition
        Q8-5 (SLD+) - Q1-4 Always Below 1 Ω
        Q8-5 (SLD+) or Q1-4 - Other terminals and body ground Always 10 kΩ or higher
        Q8-6 (SLD-) - Q1-1 Always Below 1 Ω
        Q8-6 (SLD-) or Q1-1 - Other terminals and body ground Always 10 kΩ or higher
        Front Tilt Motor
        Tester Condition Condition Specified Condition
        Q6-7 (FRV+) - Q2-1 Always Below 1 Ω
        Q6-7 (FRV+) or Q2-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-6 (FRV-) - Q2-4 Always Below 1 Ω
        Q6-6 (FRV-) or Q2-4 - Other terminals and body ground Always 10 kΩ or higher
        Rear Lifter Motor
        Tester Condition Condition Specified Condition
        Q6-9 (LFT+) - Q3-1 Always Below 1 Ω
        Q6-9 (LFT+) or Q3-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-2 (LFT-) - Q3-4 Always Below 1 Ω
        Q6-2 (LFT-) or Q3-4 - Other terminals and body ground Always 10 kΩ or higher
        Cushion Motor
        Tester Condition Condition Specified Condition
        Q6-3 (CUS+) - Q4-1 Always Below 1 Ω
        Q6-3 (CUS+) or Q4-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-1 (CUS-) - Q4-4 Always Below 1 Ω
        Q6-1 (CUS-) or Q4-4 - Other terminals and body ground Always 10 kΩ or higher
        Reclining Motor
        Tester Condition Condition Specified Condition
        Q6-8 (RCL+) - S1-1 Always Below 1 Ω
        Q6-8 (RCL+) or S1-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-5 (RCL-) - S1-4 Always Below 1 Ω
        Q6-5 (RCL-) or S1-4 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Up/Down Motor
        Tester Condition Condition Specified Condition
        Q5-5 (H+) - S9-4 Always Below 1 Ω
        Q5-5 (H+) or S9-4 - Other terminals and body ground Always 10 kΩ or higher
        Q5-4 (H-) - S9-1 Always Below 1 Ω
        Q5-4 (H-) or S9-1 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Front/Rear Motor
        Tester Condition Condition Specified Condition
        Q5-6 (HD+) - S9-5 Always Below 1 Ω
        Q5-6 (HD+) or S9-5 - Other terminals and body ground Always 10 kΩ or higher
        Q5-3 (HD-) - S9-8 Always Below 1 Ω
        Q5-3 (HD-) or S9-8 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Remove the front seatback frame sub-assembly (reclining motor).

      Click here

    2. Inspect the front seatback frame sub-assembly (recling motor).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

    REPLACE FRONT SEATBACK FRAME SUB-ASSEMBLY Click here

  11. INSPECT FRONT SEAT HEADREST INSERT SUB-ASSEMBLY (HEADREST UP/DOWN MOTOR)


    1. Remove the front seat headrest insert sub-assembly (headrest up/down motor).

      Click here

    2. Inspect the front seat headrest insert sub-assembly (headrest up/down motor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT HEADREST INSERT SUB-ASSEMBLY Click here

    OK

  12. CHECK FRONT SEAT HEADREST ASSEMBLY


    1. Temporarily replace the front seat headrest assembly with front passenger seat's one.

    2. Check that function of the headrest moving operates normally by using the front power seat switch.

      OK
      Heasrest operates forward and rearward.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT SEAT HEADREST ASSEMBLY

    NG

    GO TO STEP 6 Click here

  13. INSPECT LUMBAR SUPPORT PUMP SUB-ASSEMBLY


    1. Remove the lumbar support pump sub-assembly.

      Click here

    2. Inspect the lumbar support pump sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE LUMBAR SUPPORT PUMP SUB-ASSEMBLY Click here

    OK

  14. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LUMBAR SUPPORT PUMP SUB-ASSEMBLY)


    1. for LHD:


      1. Disconnect the Q28 position control ECU assembly connector.

      2. Disconnect the S10 lumbar support pump sub-assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-4 (POM) - S10-1 Always Below 1 Ω
        Q28-3 (POMG) - S10-2 Always Below 1 Ω
        Q28-4 (POM) or S10-1 - Other terminals and body ground Always 10 kΩ or higher
        Q28-3 (POMG) or S10-2 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q8 position control ECU assembly connector.

      2. Disconnect the S2 lumbar support pump sub-assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-4 (POM) - S2-1 Always Below 1 Ω
        Q8-3 (POMG) - S2-2 Always Below 1 Ω
        Q8-4 (POM) or S2-1 - Other terminals and body ground Always 10 kΩ or higher
        Q8-3 (POMG) or S2-2 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK HARNESS AND CONNECTOR (SEAT CHECK VALVE - BATTERY AND BODY GROUND)


    1. for LHD:


      1. Disconnect the lumbar support adjuster assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S11-1- Body ground Always Below 1 Ω

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        S11-3 - Body ground Engine switch off 11 to 14 V

    2. for RHD:


      1. Disconnect the lumbar support adjuster assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S3-1- Body ground Always Below 1 Ω

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        S3-3 - Body ground Engine switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - SEAT CHECK VALVE)


    1. for LHD:


      1. Disconnect the Q28 position control ECU assembly connector.

      2. Disconnect the S12 lumbar support adjuster assembly LH connector.

      3. Disconnect the Q30 seat check with hose valve LH connector.

      4. Disconnect the S11 seatback check with bracket valve LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-7 (LIN) - S11-5 Always Below 1 Ω
        Q28-7 (LIN) or S11-5 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q8 position control ECU assembly connector.

      2. Disconnect the S4 lumbar support adjuster assembly RH connector.

      3. Disconnect the Q10 seat check with hose valve RH connector.

      4. Disconnect the S3 seatback check with bracket valve RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-7 (LIN) - S3-5 Always Below 1 Ω
        Q8-7 (LIN) or S3-5 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  17. CHECK FRONT POWER SEAT OPERATION


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

      Click here

      Result
      Result Proceed to
      One or more power seat functions do not operate A
      All power seat functions do not operate B

    B

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

    A

  18. READ VALUE USING GTS (POWER SEAT SWITCH)


    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 / Passenger Seat / Data List.

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


      Body Electrical > Passenger 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

      		 -
      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 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

      		 -
      Lumbar Switch Front Lumbar support adjuster switch signal (forward) ON or OFF

      ON: Lumbar support adjuster switch (forward) on

      OFF: Lumbar support adjuster switch (forward) off

      		 -
      Lumbar Switch Rear Lumbar support adjuster switch signal (rearward) ON or OFF

      ON: Lumbar support adjuster switch (rearward) on

      OFF: Lumbar support adjuster switch (rearward) off

      		 -
      Cushion Length Front Cushion length switch signal (forward) ON or OFF

      ON: Cushion length switch (forward) on

      OFF: Cushion length switch (forward) off

      		 -
      Cushion Length Rear Cushion length switch signal (rearward) ON or OFF

      ON: Cushion length switch (rearward) on

      OFF: Cushion length switch (rearward) off

      		 -
      Lumbar Switch Up Lumbar support adjuster switch signal (upward) ON or OFF

      ON: Lumbar support adjuster switch (upward) on

      OFF: Lumbar support adjuster switch (upward) off

      		 -
      Lumbar Switch Down Lumbar support adjuster switch signal (downward) ON or OFF

      ON: Lumbar support adjuster switch (downward) on

      OFF: Lumbar support adjuster switch (downward) off

      		 -

      Body Electrical > Passenger Seat > Data List
      Tester Display
      Reclining Rear
      Reclining Front
      Front Vertical Down
      Front Vertical Up
      Lifter Switch Down
      Lifter Switch Up
      Slide Rear
      Slide Front
      Lumbar Switch Front
      Lumbar Switch Rear
      Lumbar Switch Front
      Lumbar Switch Rear
      Cushion Length Front
      Cushion Length Rear
      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 21 Click here

    OK

  19. PERFORM ACTIVE TEST USING GTS (POWER SEAT MOTOR)


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

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


      Body Electrical > Passenger Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Seat Reclining Seat reclining operation OFF/Rear/Front -
      Front Vertical Operation Seat front vertical operation OFF/Down/Up -
      Lifter Operation Seat lifter operation OFF/Down/Up -
      Seat Slide Operation Seat slide operation OFF/Rear/Front -
      Headrest Operation Headrest up/down operation OFF/Down/Up -
      Cushion Length Seat cushion length operation OFF/Rear/Front -
      Headrest Front/Rear Headrest front/rear operation OFF/Rear/Front -
      Lumbar Upper Pneumatic support function (lumbar upper) operation OFF/Intake/Exhaust -
      Lumbar Middle Pneumatic support function (lumbar middle) operation OFF/Intake/Exhaust -
      Lumbar Bottom Pneumatic support function (lumbar bottom) operation OFF/Intake/Exhaust -
      Lower Back Pneumatic support function (lower back) operation OFF/Intake/Exhaust -
      Lower Cushion Pneumatic support function (lower cushion) operation OFF/Intake/Exhaust -
      Shoulder Pneumatic support function (shoulder) operation OFF/Intake/Exhaust -
      Side Back Support Pneumatic support function (side back) operation OFF/Intake/Exhaust -
      Side Cushion Support Pneumatic support function (side cushion) operation OFF/Intake/Exhaust -

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Seat Reclining

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Front Vertical Operation

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Lifter Operation

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Seat Slide Operation

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Headrest Operation

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Cushion Length

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Headrest Front/Rear

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Lumbar Upper

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Lumbar Middle

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Lumbar Bottom

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Lower Back

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Lower Cushion

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Shoulder

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Side Back Support

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Side Cushion Support
      Result
      Result Proceed to
      The power seat functions operate normally. A
      Slide, front vertical, rear lifter or cushon length function does not operate normally. B
      Reclining function does not operate normally. C
      Headrest adjuster function does not operate normally. D
      Lumbar support function does not operate normally. E

    A

    REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY Click here

    C

    INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY (RECLINING MOTOR) Click here

    D

    INSPECT FRONT SEAT HEADREST INSERT SUB-ASSEMBLY (HEADREST UP/DOWN MOTOR) Click here

    E

    INSPECT LUMBAR SUPPORT PUMP SUB-ASSEMBLY Click here

    B

  20. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (SLIDE, FRONT TILT, REAR LIFTER, CUSHION MOTOR)


    1. Remove the front seat adjuster assembly (slide, front tilt, rear lifter, cushion motor).

      Click here

    2. Inspect the front seat adjuster assembly (slide, front tilt, rear lifter, cushion motor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

    OK

  21. INSPECT FRONT POWER SEAT SWITCH


    1. Remove the front power seat switch.

      Click here

    2. Inspect the front power seat switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  22. CHECK HARNESS OR CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - FRONT POWER SEAT SWITCH)


    1. for LHD:


      1. Disconnect the No. 2 position control ECU assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-17 (SYSG) - Body ground Always Below 1 Ω

      3. Measuer the voltagee according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        Q8-18 (SYSB) - Body ground Always 11 to 14 V

    2. for RHD:


      1. Disconnect the No. 2 position control ECU assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-17 (SYSG) - Body ground Always Below 1 Ω

      3. Measuer the voltagee according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        Q28-18 (SYSB) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  23. CHECK HARNESS OR CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - FRONT POWER SEAT SWITCH)


    1. for LHD:


      1. Disconnect the Q7 No. 2 position control ECU assembly connector.

      2. Disconnect the Q9 front power saet switch RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q7-20 (SLDR) - Q9-5 (SLDR) Always Below 1 Ω
        Q7-20 (SLDR) or Q9-5 (SLDR) - Other terminals and body ground Always 10 kΩ or higher
        Q7-19 (SLDF) - Q9-4 (SLDF) Always Below 1 Ω
        Q7-19 (SLDF) or Q9-4 (SLDF) - Other terminals and body ground Always 10 kΩ or higher
        Q7-11 (RCLR) - Q9-10 (RCLR) Always Below 1 Ω
        Q7-11 (RCLR) or Q9-10 (RCLR) - Other terminals and body ground Always 10 kΩ or higher
        Q7-3 (RCLF) - Q9-9 (RCLF) Always Below 1 Ω
        Q7-3 (RCLF) or Q9-9 (RCLF) - Other terminals and body ground Always 10 kΩ or higher
        Q7-12 (FRVU) - Q9-7 (FUP) Always Below 1 Ω
        Q7-12 (FRVU) or Q9-7 (FUP) - Other terminals and body ground Always 10 kΩ or higher
        Q7-21 (FRVD) - Q9-6 (FDWN) Always Below 1 Ω
        Q7-21 (FRVD) or Q9-6 (FDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q7-9 (LFTU) - Q9-8 (LUP) Always Below 1 Ω
        Q7-9 (LFTU) or Q9-8 (LUP) - Other terminals and body ground Always 10 kΩ or higher
        Q7-10 (LFTD) - Q9-3 (LDWN) Always Below 1 Ω
        Q7-10 (LFTD) or Q9-3 (LDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q7-14 (LFLF) - Q9-17 (H) Always Below 1 Ω
        Q7-14 (LFLF) or Q9-17 (H) - Other terminals and body ground Always 10 kΩ or higher
        Q7-22 (LFLR) - Q9-14 (R) Always Below 1 Ω
        Q7-22 (LFLR) or Q9-14 (R) - Other terminals and body ground Always 10 kΩ or higher
        Q7-4 (LVU) - Q9-20 (UP) Always Below 1 Ω
        Q7-4 (LVU) or Q9-20 (UP) - Other terminals and body ground Always 10 kΩ or higher
        Q7-13 (LVD) - Q9-2 (DOWN) Always Below 1 Ω
        Q7-13 (LVD) or Q9-2 (DOWN) - Other terminals and body ground Always 10 kΩ or higher
        Q7-7 (CUSF) - Q9-18 (CSNF) Always Below 1 Ω
        Q7-7 (CUSF) or Q9-18 (CSNF) - Other terminals and body ground Always 10 kΩ or higher
        Q7-8 (CUSR) - Q9-19 (CSNR) Always Below 1 Ω
        Q7-8 (CUSR) or Q9-19 (CSNR) - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q27 No. 2 position control ECU assembly connector.

      2. Disconnect the Q29 front power saet switch LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q27-20 (SLDR) - Q29-6 (SLDR) Always Below 1 Ω
        Q27-20 (SLDR) or Q29-6 (SLDR) - Other terminals and body ground Always 10 kΩ or higher
        Q27-19 (SLDF) - Q29-7 (SLDF) Always Below 1 Ω
        Q27-19 (SLDF) or Q29-7 (SLDF) - Other terminals and body ground Always 10 kΩ or higher
        Q27-11 (RCLR) - Q29-1 (RCLR) Always Below 1 Ω
        Q27-11 (RCLR) or Q29-1 (RCLR) - Other terminals and body ground Always 10 kΩ or higher
        Q27-3 (RCLF) - Q29-2 (RCLF) Always Below 1 Ω
        Q27-3 (RCLF) or Q29-2 (RCLF) - Other terminals and body ground Always 10 kΩ or higher
        Q27-12 (FRVU) - Q29-4 (FUP) Always Below 1 Ω
        Q27-12 (FRVU) or Q29-4 (FUP) - Other terminals and body ground Always 10 kΩ or higher
        Q27-21 (FRVD) - Q29-5 (FDWN) Always Below 1 Ω
        Q27-21 (FRVD) or Q29-5 (FDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q27-9 (LFTU) - Q29-3 (LUP) Always Below 1 Ω
        Q27-9 (LFTU) or Q29-3 (LUP) - Other terminals and body ground Always 10 kΩ or higher
        Q27-10 (LFTD) - Q29-8 (LDWN) Always Below 1 Ω
        Q27-10 (LFTD) or Q29-8 (LDWN) - Other terminals and body ground Always 10 kΩ or higher
        Q27-14 (LFLF) - Q29-14 (H) Always Below 1 Ω
        Q27-14 (LFLF) or Q29-14 (H) - Other terminals and body ground Always 10 kΩ or higher
        Q27-22 (LFLR) - Q29-17 (R) Always Below 1 Ω
        Q27-22 (LFLR) or Q29-17 (R) - Other terminals and body ground Always 10 kΩ or higher
        Q27-4 (LVU) - Q29-11 (UP) Always Below 1 Ω
        Q27-4 (LVU) or Q29-11 (UP) - Other terminals and body ground Always 10 kΩ or higher
        Q27-13 (LVD) - Q29-9 (DOWN) Always Below 1 Ω
        Q27-13 (LVD) or Q29-9 (DOWN) - Other terminals and body ground Always 10 kΩ or higher
        Q27-7 (CUSF) - Q29-13 (CSNF) Always Below 1 Ω
        Q27-7 (CUSF) or Q29-13 (CSNF) - Other terminals and body ground Always 10 kΩ or higher
        Q27-8 (CUSR) - Q29-12 (CSNR) Always Below 1 Ω
        Q27-8 (CUSR) or Q29-12 (CSNR) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  24. CHECK HARNESS AND CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - POWER SEAT MOTOR)


    1. for LHD:


      1. Disconnect the Q5, Q6 and Q8 No. 2 position control ECU assembly connectors.

      2. Disconnect the Q1 front seat adjuster assembly RH (slide motor) connector.

      3. Disconnect the Q2 front seat adjuster assembly RH (front tilt motor) connector.

      4. Disconnect the Q3 front seat adjuster assembly RH (rear lifter motor) connector.

      5. Disconnect the Q4 front seat adjuster assembly RH (cushion motor) connector.

      6. Disconnect the S1 front seatback frame sub-assembly rH (reclining motor) connector.

      7. Disconnect the S9 front seat headrest insert sub-assembly rH (headrest up/down, front/rear motor) connector.

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

        Standard Resistance
        Slide Motor
        Tester Condition Condition Specified Condition
        Q8-5 (SLD+) - Q1-4 Always Below 1 Ω
        Q8-5 (SLD+) or Q1-4 - Other terminals and body ground Always 10 kΩ or higher
        Q8-6 (SLD-) - Q1-1 Always Below 1 Ω
        Q8-6 (SLD-) or Q1-1 - Other terminals and body ground Always 10 kΩ or higher
        Front Tilt Motor
        Tester Condition Condition Specified Condition
        Q6-7 (FRV+) - Q2-1 Always Below 1 Ω
        Q6-7 (FRV+) or Q2-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-6 (FRV-) - Q2-4 Always Below 1 Ω
        Q6-6 (FRV-) or Q23-4 - Other terminals and body ground Always 10 kΩ or higher
        Rear Lifter Motor
        Tester Condition Condition Specified Condition
        Q6-9 (LFT+) - Q3-1 Always Below 1 Ω
        Q6-9 (LFT+) or Q3-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-2 (LFT-) - Q3-4 Always Below 1 Ω
        Q6-2 (LFT-) or Q3-4 - Other terminals and body ground Always 10 kΩ or higher
        Cushion Motor
        Tester Condition Condition Specified Condition
        Q6-3 (CUS+) - Q4-1 Always Below 1 Ω
        Q6-3 (CUS+) or Q4-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-1 (CUS-) - Q4-4 Always Below 1 Ω
        Q6-1 (CUS-) or Q4-4 - Other terminals and body ground Always 10 kΩ or higher
        Reclining Motor
        Tester Condition Condition Specified Condition
        Q6-8 (RCL+) - S1-1 Always Below 1 Ω
        Q6-8 (RCL+) or S1-1 - Other terminals and body ground Always 10 kΩ or higher
        Q6-5 (RCL-) - S1-4 Always Below 1 Ω
        Q6-5 (RCL-) or S1-4 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Up/Down Motor
        Tester Condition Condition Specified Condition
        Q5-5 (H+) - S9-4 Always Below 1 Ω
        Q5-5 (H+) or S9-4 - Other terminals and body ground Always 10 kΩ or higher
        Q5-4 (H-) - S9-1 Always Below 1 Ω
        Q5-4 (H-) or S9-1 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Front/Rear Motor
        Tester Condition Condition Specified Condition
        Q5-6 (HD+) - S9-5 Always Below 1 Ω
        Q5-6 (HD+) or S9-5 - Other terminals and body ground Always 10 kΩ or higher
        Q5-3 (HD-) - S9-8 Always Below 1 Ω
        Q5-3 (HD-) or S9-8 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q25, Q26 and Q28 No. 2 position control ECU assembly connectors.

      2. Disconnect the Q21 front seat adjuster assembly LH (slide motor) connector.

      3. Disconnect the Q23 front seat adjuster assembly LH (front tilt motor) connector.

      4. Disconnect the Q22 front seat adjuster assembly LH (rear lifter motor) connector.

      5. Disconnect the Q24 front seat adjuster assembly LH (cushion motor) connector.

      6. Disconnect the S15 front seatback frame sub-assembly LH (reclining motor) connector.

      7. Disconnect the S17 front seat headrest insert sub-assembly LH (headrest up/down, front/rear motor) connector.

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

        Standard Resistance
        Slide Motor
        Tester Condition Condition Specified Condition
        Q28-5 (SLD+) - Q21-4 Always Below 1 Ω
        Q28-5 (SLD+) or Q21-4 - Other terminals and body ground Always 10 kΩ or higher
        Q28-6 (SLD-) - Q21-1 Always Below 1 Ω
        Q28-6 (SLD-) or Q21-1 - Other terminals and body ground Always 10 kΩ or higher
        Front Tilt Motor
        Tester Condition Condition Specified Condition
        Q26-7 (FRV+) - Q23-1 Always Below 1 Ω
        Q26-7 (FRV+) or Q23-1 - Other terminals and body ground Always 10 kΩ or higher
        Q26-6 (FRV-) - Q23-4 Always Below 1 Ω
        Q26-6 (FRV-) or Q23-4 - Other terminals and body ground Always 10 kΩ or higher
        Rear Lifter Motor
        Tester Condition Condition Specified Condition
        Q26-9 (LFT+) - Q22-1 Always Below 1 Ω
        Q26-9 (LFT+) or Q22-1 - Other terminals and body ground Always 10 kΩ or higher
        Q26-2 (LFT-) - Q22-4 Always Below 1 Ω
        Q26-2 (LFT-) or Q22-4 - Other terminals and body ground Always 10 kΩ or higher
        Cushion Motor
        Tester Condition Condition Specified Condition
        Q26-3 (CUS+) - Q24-1 Always Below 1 Ω
        Q26-3 (CUS+) or Q24-1 - Other terminals and body ground Always 10 kΩ or higher
        Q26-1 (CUS-) - Q24-4 Always Below 1 Ω
        Q26-1 (CUS-) or Q24-4 - Other terminals and body ground Always 10 kΩ or higher
        Reclining Motor
        Tester Condition Condition Specified Condition
        Q26-8 (RCL+) - S15-1 Always Below 1 Ω
        Q26-8 (RCL+) or S15-1 - Other terminals and body ground Always 10 kΩ or higher
        Q26-5 (RCL-) - S15-4 Always Below 1 Ω
        Q26-5 (RCL-) or S15-4 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Up/Down Motor
        Tester Condition Condition Specified Condition
        Q25-5 (H+) - S17-4 Always Below 1 Ω
        Q25-5 (H+) or S17-4 - Other terminals and body ground Always 10 kΩ or higher
        Q25-4 (H-) - S17-1 Always Below 1 Ω
        Q25-4 (H-) or S17-1 - Other terminals and body ground Always 10 kΩ or higher
        Headrest Front/Rear Motor
        Tester Condition Condition Specified Condition
        Q25-6 (HD+) - S17-5 Always Below 1 Ω
        Q25-6 (HD+) or S17-5 - Other terminals and body ground Always 10 kΩ or higher
        Q25-3 (HD-) - S17-8 Always Below 1 Ω
        Q25-3 (HD-) or S17-8 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Remove the front seatback frame sub-assembly (reclining motor).

      Click here

    2. Inspect the front seatback frame sub-assembly (recling motor).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 21 Click here

    NG

    REPLACE FRONT SEATBACK FRAME SUB-ASSEMBLY Click here

  26. INSPECT FRONT SEAT HEADREST INSERT SUB-ASSEMBLY (HEADREST UP/DOWN MOTOR)


    1. Remove the front seat headrest insert sub-assembly (headrest up/down motor).

      Click here

    2. Inspect the front seat headrest insert sub-assembly (headrest up/down motor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT HEADREST INSERT SUB-ASSEMBLY Click here

    OK

  27. CHECK FRONT SEAT HEADREST ASSEMBLY


    1. Temporarily replace the front seat headrest assembly with driver seat's one.

    2. Check that function of the headrest moving operates normally by using the front power seat switch.

      OK
      Heasrest operates forward and rearward.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT SEAT HEADREST ASSEMBLY

    NG

    GO TO STEP 21 Click here

  28. INSPECT LUMBAR SUPPORT PUMP SUB-ASSEMBLY


    1. Remove the lumbar support pump sub-assembly.

      Click here

    2. Inspect the lumbar support pump sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE LUMBAR SUPPORT PUMP SUB-ASSEMBLY Click here

    OK

  29. CHECK HARNESS AND CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - LUMBAR SUPPORT PUMP SUB-ASSEMBLY)


    1. for LHD:


      1. Disconnect the Q8 No. 2 position control ECU assembly connector.

      2. Disconnect the S2 lumbar support pump sub-assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-4 (POM) - S2-1 Always Below 1 Ω
        Q8-3 (POMG) - S2-2 Always Below 1 Ω
        Q8-4 (POM) or S2-1 - Other terminals and body ground Always 10 kΩ or higher
        Q8-3 (POMG) or S2-2 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q28 No. 2 position control ECU assembly connector.

      2. Disconnect the S10 lumbar support pump sub-assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-4 (POM) - S10-1 Always Below 1 Ω
        Q28-3 (POMG) - S10-2 Always Below 1 Ω
        Q28-4 (POM) or S10-1 - Other terminals and body ground Always 10 kΩ or higher
        Q28-3 (POMG) or S10-2 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  30. CHECK HARNESS AND CONNECTOR (SEAT CHECK VALVE - BATTERY AND BODY GROUND)


    1. for LHD:


      1. Disconnect the lumbar support adjuster assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S3-1- Body ground Always Below 1 Ω

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        S3-3 - Body ground Engine switch off 11 to 14 V

    2. for RHD:


      1. Disconnect the lumbar support adjuster assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S11-1- Body ground Always Below 1 Ω

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        S11-3 - Body ground Engine switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  31. CHECK HARNESS AND CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - SEAT CHECK VALVE)


    1. for LHD:


      1. Disconnect the Q8 No. 2 position control ECU assembly connector.

      2. Disconnect the S4 lumbar support adjuster assembly RH connector.

      3. Disconnect the Q10 seat check with hose valve RH connector.

      4. Disconnect the S3 seatback check with bracket valve RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-7 (LIN) - S3-5 Always Below 1 Ω
        Q8-7 (LIN) or S3-5 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q28 No. 2 position control ECU assembly connector.

      2. Disconnect the S12 lumbar support adjuster assembly LH connector.

      3. Disconnect the Q30 seat check with hose valve LH connector.

      4. Disconnect the S11 seatback check with bracket valve LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-7 (LIN) - S12-5 Always Below 1 Ω
        Q28-7 (LIN) or S12-5 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR