FRONT POWER SEAT CONTROL SYSTEM(w/ Memory), Diagnostic DTC:B2652

DTC Code DTC Name
B2652 Front Vertical Sensor Malfunction

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2652

Front Vertical Sensor Malfunction

The upward and downward lock detection position of the sensor is the same.

  • Position control ECU and switch assembly

  • Front vertical motor (Separate type front seat cushion spring assembly)

  • Harness or connector

WIRING DIAGRAM

B342142E08

PROCEDURE

  1. PERFORM ACTIVE TEST USING GTS (FRONT VERTICAL MOTOR)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. 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

      Motor operates normally.

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

  2. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT VERTICAL MOTOR CIRCUIT)

    1. E118523C52

      *a

      Front view of wire harness connector

      (to Front Vertical Motor [Separate Type Front Seat Cushion Spring Assembly])

      Disconnect the e13 front vertical motor connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      e13-2 - e13-3

      Front vertical switch on

      4.8 to 5.1 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - FRONT VERTICAL MOTOR)Click here

    OK

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

    1. B238515C38

      *a

      Component with harness connected

      (Front Vertical Motor [Separate Type Front Seat Cushion Spring Assembly])

      Reconnect the e13 front vertical motor connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      e13-2 - Body ground

      Front vertical switch on

      4.5 to 4.8 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

    Click here

    NG

    REPLACE FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY)

    Click here

  4. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - FRONT VERTICAL MOTOR)

    1. Disconnect the e6 position control ECU and switch assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      e6-3 (SSFV) - e13-2

      Always

      Below 1 Ω

      e6-1 (SGND) - e13-3

      Always

      Below 1 Ω

      e6-3 (SSFV) - Body ground

      Always

      10 kΩ or higher

      e6-1 (SGND) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Remove the separate type front seat cushion spring assembly.

      Click here

    2. Inspect the separate type front seat cushion spring assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT VERTICAL MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY)

    Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - FRONT VERTICAL MOTOR)

    1. Disconnect the e18 position control ECU and switch assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      e18-8 (FRV+) - e13-4

      Always

      Below 1 Ω

      e18-5 (FRV-) - e13-1

      Always

      Below 1 Ω

      e18-8 (FRV+) - Body ground

      Always

      10 kΩ or higher

      e18-5 (FRV-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR