FRONT POWER SEAT CONTROL SYSTEM (w/ Memory), Diagnostic DTC:B2653

DTC Code DTC Name
B2653 Lifter Sensor Malfunction

DESCRIPTION

When the front power seat switch LH (w/ Memory) 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.

  • Front power seat switch LH (w/ Memory)

  • Lifter motor (Separate type front seat cushion assembly)

  • Wire harness or connector

WIRING DIAGRAM

A01EXGQE16

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR)


    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 / Driver Seat / Active Test.

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

      Driver Seat (Front Power Seat Switch LH (w/ Memory))
      Tester Display Test Part Control Range Diagnostic Note
      Lifter Operation Seat lifter operation OFF/Down/Up -
      OK
      Motor operates normally.

    NG

    INSPECT LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY) Click here

    OK

  2. CHECK FRONT POWER SEAT SWITCH LH (W/ MEMORY) (LIFTER MOTOR CIRCUIT)


    1. Disconnect the e10 lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      e10-2 - e10-3 Lifter switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH (W/ MEMORY) - LIFTER MOTOR) Click here

    OK

  3. CHECK LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY)


    1. A01EX74E45
      Text in Illustration
      *a

      Component with harness connected

      (Lifter Motor (Separate Type Front Seat Cushion Assembly))

      Reconnect the e10 lifter motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      e10-2 - Body ground Lifter switch on 4.5 to 4.8 V

    NG

    REPLACE LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY) Click here

    OK

    REPLACE FRONT POWER SEAT SWITCH LH (W/ MEMORY) Click here

  4. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH (W/ MEMORY) - LIFTER MOTOR)


    1. Disconnect the e12 front power seat switch LH (w/ Memory) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      e12-4 (SSRL) - e10-2 Always Below 1 Ω
      e12-1 (SGND) - e10-3 Always Below 1 Ω
      e12-4 (SSRL) - Body ground Always 10 kΩ or higher
      e12-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH LH (W/ MEMORY) Click here

  5. INSPECT LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY)


    1. A01EWJBE14
      Text in Illustration
      *a

      Component without harness connected

      (Lifter Motor (Separate Type Front Seat Cushion Assembly))

      Disconnect the e10 lifter motor connector.

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

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → Terminal 4

      Battery negative (-) → Terminal 1

      		 Seat cushion moves upward

      Battery positive (+) → Terminal 1

      Battery negative (-) → Terminal 4

      		 Seat cushion moves downward

    NG

    REPLACE LIFTER MOTOR (SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH (W/ MEMORY) - LIFTER MOTOR)


    1. Disconnect the e11 front power seat switch LH (w/ Memory) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      e11-10 (LFT+) - e10-4 Always Below 1 Ω
      e11-12 (LFT-) - e10-1 Always Below 1 Ω
      e11-10 (LFT+) - Body ground Always 10 kΩ or higher
      e11-12 (LFT-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH LH (W/ MEMORY) Click here