FRONT POWER SEAT CONTROL SYSTEM (for RHD), Diagnostic DTC:B2653

DTC Code DTC Name
B2653 Lifter Sensor Malfunction

DESCRIPTION


When the power seat switch assembly*1 or position control ECU assembly*2, *3 does not receive a sensor signal despite upward or downward movement of the seat by power seat motor operation, this DTC is stored.

DTC Code DTC Detection Condition Trouble Area
B2653 The upward and downward lock detection position of the sensor is the same.

  • Power seat switch assembly*1

  • Position control ECU assembly*2, *3

  • Front seat adjuster assembly RH (Lifter motor)*1, *2

  • Front seat adjuster assembly LH (Lifter motor)*3

  • Harness or connector

WIRING DIAGRAM


  1. for Driver Side (Standard Seat Type):

    A01FQI6E32

  2. for Driver Side (Sports Seat Type, Luxury Seat Type):

    A01FQI6E33

  3. for Front Passenger Side (Luxury Seat Type):

    A01FQI6E34

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Check the parts which the DTCs have been output from Click here.

      Result
      Result Proceed to
      DTC output from "Driver Seat" A
      DTC output from "Passenger Seat" B

    B

    PERFORM ACTIVE TEST USING GTS (LIFTER OPERATION) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (LIFTER OPERATION)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

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

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

      Driver Seat
      Tester Display Test Part Control Range Diagnostic Note
      Lifter Operation Seat lifter operation Up / OFF / Down -
      OK
      Motor operates normally.
      Result
      Result Proceed to
      OK (for Standard Seat Type) A
      OK (for Sports Seat Type, Luxury Seat Type) B
      NG C

    B

    CHECK POSITION CONTROL ECU ASSEMBLY (LIFTER MOTOR CIRCUIT) Click here

    C

    INSPECT FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR) Click here

    A

  3. CHECK POWER SEAT SWITCH ASSEMBLY (LIFTER MOTOR CIRCUIT)


    1. A01FSRQE62
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Front Seat Adjuster Assembly RH [Lifter Motor])

      Disconnect the lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c13-2 (O/P) - c13-3 (GND) Lifter switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (POWER SEAT SWITCH ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) Click here

    OK

  4. CHECK FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR)


    1. A01FR07E84
      Text in Illustration
      *a

      Component with harness connected

      (Front Seat Adjuster Assembly RH [Lifter Motor])

      Reconnect the lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c13-2 (O/P) - Body ground Lifter switch on 4.5 to 4.8 V

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR) Click here

    OK

    REPLACE POWER SEAT SWITCH ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (POWER SEAT SWITCH ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH)


    1. Disconnect the c15 power seat switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c15-4 (SSRL) - c13-2 (O/P) Always Below 1 Ω
      c15-1 (SGND) - c13-3 (GND) Always Below 1 Ω
      c15-4 (SSRL) - Body ground Always 10 kΩ or higher
      c15-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER SEAT SWITCH ASSEMBLY Click here

  6. CHECK POSITION CONTROL ECU ASSEMBLY (LIFTER MOTOR CIRCUIT)


    1. A01FSRQE62
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Front Seat Adjuster Assembly RH [Lifter Motor])

      Disconnect the lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c13-2 (O/P) - c13-3 (GND) Lifter switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) Click here

    OK

  7. CHECK FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR)


    1. A01FR07E84
      Text in Illustration
      *a

      Component with harness connected

      (Front Seat Adjuster Assembly RH [Lifter Motor])

      Reconnect the lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c13-2 (O/P) - Body ground Lifter switch on 4.5 to 4.8 V
      Result
      Result Proceed to
      OK (for Sports Seat Type) A
      OK (for Luxury Seat Type) B
      NG (for Sports Seat Type) C
      NG (for Luxury Seat Type) D

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR) Click here

    D

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR) Click here

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

  8. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH)


    1. Disconnect the c2 and c3 position control ECU assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c3-10 (SSRL) - c13-2 (O/P) Always Below 1 Ω
      c2-20 (SGND) - c13-3 (GND) Always Below 1 Ω
      c3-10 (SSRL) - Body ground Always 10 kΩ or higher
      c2-20 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for Sports Seat Type) A
      OK (for Luxury Seat Type) B
      NG C

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

  9. INSPECT FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR)


    1. A01FVQQE14
      Text in Illustration
      *a

      Component without harness connected

      (Front Seat Adjuster Assembly RH [Lifter Motor])

      Disconnect the c13 lifter motor connector.

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

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → 1 (UP)

      Battery negative (-) → 4 (DOWN)

      		 Upward

      Battery positive (+) → 4 (DOWN)

      Battery negative (-) → 1 (UP)

      		 Downward
      Result
      Result Proceed to
      OK (for Standard Seat Type) A
      OK (for Sports Seat Type, Luxury Seat Type) B
      NG (for Standard Seat Type) C
      NG (for Sports Seat Type) D
      NG (for Luxury Seat Type) E

    B

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH) Click here

    C

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR) Click here

    D

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR) Click here

    E

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (LIFTER MOTOR) Click here

    A

  10. CHECK HARNESS AND CONNECTOR (POWER SEAT SWITCH ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH)


    1. Disconnect the c17 power seat switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c17-10 (LFT+) - c13-1 (UP) Always Below 1 Ω
      c17-12 (LFT-) - c13-4 (DOWN) Always Below 1 Ω
      c17-10 (LFT+) - Body ground Always 10 kΩ or higher
      c17-12 (LFT-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER SEAT SWITCH ASSEMBLY Click here

  11. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY RH)


    1. Disconnect the c5 position control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c5-2 (LFT+) - c13-1 (UP) Always Below 1 Ω
      c5-9 (LFT-) - c13-4 (DOWN) Always Below 1 Ω
      c5-2 (LFT+) - Body ground Always 10 kΩ or higher
      c5-9 (LFT-) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for Sports Seat Type) A
      OK (for Luxury Seat Type) B
      NG C

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

  12. PERFORM ACTIVE TEST USING GTS (LIFTER OPERATION)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

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

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

      Passenger Seat
      Tester Display Test Part Control Range Diagnostic Note
      Lifter Operation Seat lifter operation Up / OFF / Down -
      OK
      Motor operates normally.

    NG

    INSPECT FRONT SEAT ADJUSTER ASSEMBLY LH (LIFTER MOTOR) Click here

    OK

  13. CHECK POSITION CONTROL ECU ASSEMBLY (LIFTER MOTOR CIRCUIT)


    1. A01FSRQE63
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Front Seat Adjuster Assembly LH [Lifter Motor])

      Disconnect the lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      d12-2 (VCC) - d12-3 (GND) Lifter switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY LH) Click here

    OK

  14. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (LIFTER MOTOR)


    1. A01FR07E85
      Text in Illustration
      *a

      Component with harness connected

      (Front Seat Adjuster Assembly LH [Lifter Motor])

      Reconnect the lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      d12-2 (VCC) - Body ground Lifter switch on 4.5 to 4.8 V

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH (LIFTER MOTOR) Click here

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

  15. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY LH)


    1. Disconnect the d4 and d5 position control ECU assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      d4-10 (SSRL) - d12-2 (VCC) Always Below 1 Ω
      d5-20 (SGND) - d12-3 (GND) Always Below 1 Ω
      d4-10 (SSRL) - Body ground Always 10 kΩ or higher
      d5-20 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

  16. INSPECT FRONT SEAT ADJUSTER ASSEMBLY LH (LIFTER MOTOR)


    1. A01FVQQE14
      Text in Illustration
      *a

      Component without harness connected

      (Front Seat Adjuster Assembly LH [Lifter Motor])

      Disconnect the d12 lifter motor connector.

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

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → 1 (UP)

      Battery negative (-) → 4 (DOWN)

      		 Upward

      Battery positive (+) → 4 (DOWN)

      Battery negative (-) → 1 (UP)

      		 Downward

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH (LIFTER MOTOR) Click here

    OK

  17. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT ADJUSTER ASSEMBLY LH)


    1. Disconnect the d2 position control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      d2-2 (LFT+) - d12-1 (UP) Always Below 1 Ω
      d2-9 (LFT-) - d12-4 (DOWN) Always Below 1 Ω
      d2-2 (LFT+) - Body ground Always 10 kΩ or higher
      d2-9 (LFT-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here