FRONT POWER SEAT CONTROL SYSTEM (for RHD), Diagnostic DTC:B2652

DTC Code DTC Name
B2652 Front Vertical 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
B2652 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 (Front vertical motor)*1, *2

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

  • Harness or connector

WIRING DIAGRAM


  1. for Driver Side (Standard Seat Type):

    A01FQI6E29

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

    A01FQI6E30

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

    A01FQI6E31

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 (FRONT VERTICAL OPERATION) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (FRONT VERTICAL 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
      Front Vertical Operation Seat front vertical 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 (SLIDE MOTOR CIRCUIT) Click here

    C

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

    A

  3. CHECK POWER SEAT SWITCH ASSEMBLY (FRONT VERTICAL MOTOR CIRCUIT)


    1. A01FSRQE60
      Text in Illustration
      *a

      Front view of wire harness connector

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

      Disconnect the 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
      c11-2 (O/P) - c11-3 (GND) Front vertical 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 (FRONT VERTICAL MOTOR)


    1. A01FR07E82
      Text in Illustration
      *a

      Component with harness connected

      (Front Seat Adjuster Assembly RH [Front Vertical Motor])

      Reconnect the 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
      c11-2 (O/P) - Body ground Front vertical switch on 4.5 to 4.8 V

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (FRONT VERTICAL 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
      c15-3 (SSFV) - c11-2 (O/P) Always Below 1 Ω
      c15-1 (SGND) - c11-3 (GND) Always Below 1 Ω
      c15-3 (SSFV) - 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 (SLIDE MOTOR CIRCUIT)


    1. A01FSRQE60
      Text in Illustration
      *a

      Front view of wire harness connector

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

      Disconnect the 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
      c11-2 (O/P) - c11-3 (GND) Front vertical 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 (FRONT VERTICAL MOTOR)


    1. A01FR07E82
      Text in Illustration
      *a

      Component with harness connected

      (Front Seat Adjuster Assembly RH [Front Vertical Motor])

      Reconnect the 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
      c11-2 (O/P) - Body ground Front vertical 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 (Sports Seat Type) C
      NG (Luxury Seat Type) D

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

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

    D

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (FRONT VERTICAL 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
      c3-24 (SSFV) - c11-2 (O/P) Always Below 1 Ω
      c2-20 (SGND) - c11-3 (GND) Always Below 1 Ω
      c3-24 (SSFV) - 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 (FRONT VERTICAL MOTOR)


    1. A01FVQQE12
      Text in Illustration
      *a

      Component without harness connected

      (Front Seat Adjuster Assembly RH [Front Vertical Motor])

      Disconnect the c11 front vertical motor connector.

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

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → 4 (UP)

      Battery negative (-) → 1 (DOWN)

      		 Upward

      Battery positive (+) → 1 (DOWN)

      Battery negative (-) → 4 (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 (FRONT VERTICAL MOTOR) Click here

    D

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

    E

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH (FRONT VERTICAL 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
      c17-8 (FRV+) - c11-4 (UP) Always Below 1 Ω
      c17-5 (FRV-) - c11-1 (DOWN) Always Below 1 Ω
      c17-8 (FRV+) - Body ground Always 10 kΩ or higher
      c17-5 (FRV-) - 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
      c5-7 (FRV+) - c11-4 (UP) Always Below 1 Ω
      c5-4 (FRV-) - c11-1 (DOWN) Always Below 1 Ω
      c5-7 (FRV+) - Body ground Always 10 kΩ or higher
      c5-4 (FRV-) - 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 (FRONT VERTICAL 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
      Front Vertical Operation Seat front vertical operation Up / OFF / Down -
      OK
      Motor operates normally.

    NG

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

    OK

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


    1. A01FSRQE61
      Text in Illustration
      *a

      Front view of wire harness connector

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

      Disconnect the 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
      d10-2 (VCC) - d10-3 (GND) Front vertical 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 (FRONT VERTICAL MOTOR)


    1. A01FR07E83
      Text in Illustration
      *a

      Component with harness connected

      (Front Seat Adjuster Assembly LH [Front Vertical Motor])

      Reconnect the 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
      d10-2 (VCC) - Body ground Front vertical switch on 4.5 to 4.8 V

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH (FRONT VERTICAL 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
      d4-24 (SSFV) - d10-2 (VCC) Always Below 1 Ω
      d5-20 (SGND) - d10-3 (GND) Always Below 1 Ω
      d4-24 (SSFV) - 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 (FRONT VERTICAL MOTOR)


    1. A01FVQQE12
      Text in Illustration
      *a

      Component without harness connected

      (Front Seat Adjuster Assembly LH [Front Vertical Motor])

      Disconnect the d10 front vertical motor connector.

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

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → 4 (UP)

      Battery negative (-) → 1 (DOWN)

      		 Upward

      Battery positive (+) → 1 (DOWN)

      Battery negative (-) → 4 (UP)

      		 Downward

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH (FRONT VERTICAL 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
      d2-7 (FRV+) - d10-4 (UP) Always Below 1 Ω
      d2-4 (FRV-) - d10-1 (DOWN) Always Below 1 Ω
      d2-7 (FRV+) - Body ground Always 10 kΩ or higher
      d2-4 (FRV-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here