FRONT POWER SEAT CONTROL SYSTEM (for RHD), Diagnostic DTC:B2651

DTC Code DTC Name
B2651 Reclining Sensor Malfunction

DESCRIPTION


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

DTC Code DTC Detection Condition Trouble Area
B2651 The forward and backward lock detection position of the sensor is the same.

  • Power seat switch assembly*1

  • Position control ECU assembly*2, *3

  • Power seat reclining motor assembly

  • Harness or connector

WIRING DIAGRAM


  1. for Driver Side (Standard Seat Type):

    A01FES0E04

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

    A01FES0E05

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

    A01FES0E06

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 (SEAT RECLINING) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (SEAT RECLINING)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine 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 Ranger Diagnostic Note
      Seat Reclining Seat reclining operation Front / OFF / Rear -
      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 (RECLINING MOTOR CIRCUIT) Click here

    C

    INSPECT POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    A

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


    1. A01FDXZE58
      Text in Illustration
      *a

      Front view of harness connector

      (to Power Seat Reclining Motor Assembly)

      Disconnect the reclining motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c25-2 (O/P) - c25-3 (GND) Reclining switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (POWER SEAT SWITCH ASSEMBLY - POWER SEAT RECLINING MOTOR ASSEMBLY) Click here

    OK

  4. CHECK POWER SEAT RECLINING MOTOR ASSEMBLY


    1. A01FFM9E80
      Text in Illustration
      *a

      Component with harness connected

      (Power Seat Reclining Motor Assembly)

      Reconnect the reclining motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c25-2 (O/P) - Body ground Reclining switch on 4.5 to 4.8 V

    NG

    REPLACE POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    OK

    REPLACE POWER SEAT SWITCH ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (POWER SEAT SWITCH ASSEMBLY - POWER SEAT RECLINING MOTOR ASSEMBLY)


    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
      c15-11 (SSRR) - c25-2 (O/P) Always Below 1 Ω
      c15-1 (SGND) - c25-3 (GND) Always Below 1 Ω
      c15-11 (SSRR) - 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 (RECLINING MOTOR CIRCUIT)


    1. A01FDXZE58
      Text in Illustration
      *a

      Front view of harness connector

      (to Power Seat Reclining Motor Assembly)

      Disconnect the reclining motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c25-2 (O/P) - c25-3 (GND) Reclining switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - POWER SEAT RECLINING MOTOR ASSEMBLY) Click here

    OK

  7. CHECK POWER SEAT RECLINING MOTOR ASSEMBLY


    1. A01FFM9E80
      Text in Illustration
      *a

      Component with harness connected

      (Power Seat Reclining Motor Assembly)

      Reconnect the reclining motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      c25-2 (O/P) - Body ground Reclining 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 POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    D

    REPLACE POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

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


    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
      c3-14 (SSRR) - c25-2 (O/P) Always Below 1 Ω
      c2-20 (SGND) - c25-3 (GND) Always Below 1 Ω
      c3-14 (SSRR) - 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 POWER SEAT RECLINING MOTOR ASSEMBLY


    1. A01FFTWE10
      Text in Illustration
      *a

      Component without harness connected

      (Power Seat Reclining Motor Assembly)

      Disconnect the c25 reclining motor connector.

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

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → 4 (FWD)

      Battery negative (-) → 1 (BACK)

      		 Forward

      Battery positive (+) → 1 (BACK)

      Battery negative (-) → 4 (FWD)

      		 Backward
      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 - POWER SEAT RECLINING MOTOR ASSEMBLY) Click here

    C

    REPLACE POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    D

    REPLACE POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    E

    REPLACE POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    A

  10. CHECK HARNESS AND CONNECTOR (POWER SEAT SWITCH ASSEMBLY - POWER SEAT RECLINING MOTOR ASSEMBLY)


    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
      c17-9 (RCL+) - c25-4 (FWD) Always Below 1 Ω
      c17-11 (RCL-) - c25-1 (BACK) Always Below 1 Ω
      c17-9 (RCL+) - Body ground Always 10 kΩ or higher
      c17-11 (RCL-) - 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 - POWER SEAT RECLINING MOTOR ASSEMBLY)


    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
      c5-8 (RCL+) - c25-4 (FWD) Always Below 1 Ω
      c5-10 (RCL-) - c25-1 (BACK) Always Below 1 Ω
      c5-8 (RCL+) - Body ground Always 10 kΩ or higher
      c5-10 (RCL-) - 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 (SEAT RECLINING)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine 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 Ranger Diagnostic Note
      Seat Reclining Seat reclining operation Front / OFF / Rear -
      OK
      Motor operates normally.

    NG

    INSPECT POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    OK

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


    1. A01FDXZE59
      Text in Illustration
      *a

      Front view of harness connector

      (to Power Seat Reclining Motor Assembly)

      Disconnect the reclining motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      d25-2 (VCC) - d25-3 (GND) Reclining switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - POWER SEAT RECLINING MOTOR ASSEMBLY) Click here

    OK

  14. CHECK POWER SEAT RECLINING MOTOR ASSEMBLY


    1. A01FFM9E81
      Text in Illustration
      *a

      Component with harness connected

      (Power Seat Reclining Motor Assembly)

      Reconnect the reclining motor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      d25-2 (VCC) - Body ground Reclining switch on 4.5 to 4.8 V

    NG

    REPLACE POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

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


    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
      d4-14 (SSRR) - d25-2 (VCC) Always Below 1 Ω
      d5-20 (SGND) - d25-3 (GND) Always Below 1 Ω
      d4-14 (SSRR) - 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 POWER SEAT RECLINING MOTOR ASSEMBLY


    1. A01FFTWE10
      Text in Illustration
      *a

      Component without harness connected

      (Power Seat Reclining Motor Assembly)

      Disconnect the d25 reclining motor connector.

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

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → 4 (FWD)

      Battery negative (-) → 1 (BACK)

      		 Forward

      Battery positive (+) → 1 (BACK)

      Battery negative (-) → 4 (FWD)

      		 Backward

    NG

    REPLACE POWER SEAT RECLINING MOTOR ASSEMBLY Click here

    OK

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


    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
      d2-8 (RCL+) - d25-4 (FWD) Always Below 1 Ω
      d2-10 (RCL-) - d25-1 (BACK) Always Below 1 Ω
      d2-8 (RCL+) - Body ground Always 10 kΩ or higher
      d2-10 (RCL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here