REAR POWER SEAT CONTROL SYSTEM(for Third Row) Fold Seat Switch Circuit

DESCRIPTION

When a switch of the fold seat switch assembly or No. 1 fold seat switch assembly is pushed, the fold seat control ECU receives a switch operation signal and operates the fold or return function.

WIRING DIAGRAM

B005N34E06

CAUTION / NOTICE / HINT

Note

When a fold seat control ECU (RH/LH seat) is replaced, it is necessary to perform initialization.

Click here

PROCEDURE


  1. CHECK REAR POWER SEAT CONTROL SYSTEM (for Third Row)


    1. Check that the rear power seat control system (for Third Row) function operates normally.

      Result
      Result Proceed to
      When fold seat switch assembly operated Fold/Return functions of both rear No. 2 power seats do not operate normally. A
      Fold function of rear No. 2 power seat RH does not operate normally. B
      Return function of rear No. 2 power seat RH does not operate normally. C
      Fold function of rear No. 2 power seat LH does not operate normally. D
      Return function of rear No. 2 power seat LH does not operate normally. E
      When No. 1 fold seat switch assembly operated Fold/Return functions of both rear No. 2 power seats do not operate normally. F
      Fold function of rear No. 2 power seat RH does not operate normally. G
      Return function of rear No. 2 power seat RH does not operate normally. H
      Fold function of rear No. 2 power seat LH does not operate normally. I
      Return function of rear No. 2 power seat LH does not operate normally. J

    B

    INSPECT FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (RH)) Click here

    C

    INSPECT FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (RH)) Click here

    D

    INSPECT FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (LH)) Click here

    E

    INSPECT FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (LH)) Click here

    F

    INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (GROUND) Click here

    G

    INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (RH)) Click here

    H

    INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (RH)) Click here

    I

    INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (LH)) Click here

    J

    INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (LH)) Click here

    A

  2. INSPECT FOLD SEAT SWITCH ASSEMBLY (GROUND)


    1. Remove the fold seat switch assembly.

      Click here

    2. Inspect the fold seat switch assembly. (Ground)

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FOLD SEAT SWITCH ASSEMBLY - BODY GROUND)


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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      R61-7 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      S91-7 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (RH))


    1. Remove the fold seat switch assembly.

      Click here

    2. Inspect the fold seat switch assembly. (Fold Switch (RH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  5. CHECK FOLD SEAT CONTROL ECU (RH SEAT)


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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      R61-8 (FLDR) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      S91-8 (FLDR) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  6. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (RH SEAT) - FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the k3 fold seat control ECU (RH seat) connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      k3-26 (RCLF) - R61-8 (FLDR) Always Below 1 Ω
      k3-26 (RCLF) or R61-8 (FLDR) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      k3-26 (RCLF) - S91-8 (FLDR) Always Below 1 Ω
      k3-26 (RCLF) or S91-8 (FLDR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (RH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (RH))


    1. Remove the fold seat switch assembly.

      Click here

    2. Inspect the fold seat switch assembly. (Return Switch (RH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  8. CHECK FOLD SEAT CONTROL ECU (RH SEAT)


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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      R61-3 (RTNR) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      S91-3 (RTNR) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  9. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (RH SEAT) - FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the k3 fold seat control ECU (RH seat) connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      k3-25 (RCLR) - R61-3 (RTNR) Always Below 1 Ω
      k3-25 (RCLR) or R61-3 (RTNR) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      k3-25 (RCLR) - S91-3 (RTNR) Always Below 1 Ω
      k3-25 (RCLR) or S91-3 (RTNR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (RH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. INSPECT FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (LH))


    1. Remove the fold seat switch assembly.

      Click here

    2. Inspect the fold seat switch assembly. (Fold Switch (LH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  11. CHECK FOLD SEAT CONTROL ECU (LH SEAT)


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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      R61-6 (FLDL) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      S91-6 (FLDL) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  12. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (LH SEAT) - FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the m4 fold seat control ECU (LH seat) connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      m4-26 (RCLF) - R61-6 (FLDL) Always Below 1 Ω
      m4-26 (RCLF) or R61-6 (FLDL) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      m4-26 (RCLF) - S91-6 (FLDL) Always Below 1 Ω
      m4-26 (RCLF) or S91-6 (FLDL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (LH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. INSPECT FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (LH))


    1. Remove the fold seat switch assembly.

      Click here

    2. Inspect the fold seat switch assembly. (Return Switch (LH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  14. CHECK FOLD SEAT CONTROL ECU (LH SEAT)


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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      R61-1 (RTNL) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      S91-1 (RTNL) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  15. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (LH SEAT) - FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the m4 fold seat control ECU (LH seat) connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      m4-25 (RCLR) - R61-1 (RTNL) Always Below 1 Ω
      m4-25 (RCLR) or R61-1 (RTNL) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      m4-25 (RCLR) - S91-1 (RTNL) Always Below 1 Ω
      m4-25 (RCLR) or S91-1 (RTNL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (LH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  16. INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (GROUND)


    1. Remove the No. 1 fold seat switch assembly.

      Click here

    2. Inspect the No. 1 fold seat switch assembly. (Ground)

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  17. CHECK HARNESS AND CONNECTOR (NO. 1 FOLD SEAT SWITCH ASSEMBLY - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S88-7 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  18. INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (RH))


    1. Remove the No. 1 fold seat switch assembly.

      Click here

    2. Inspect the No. 1 fold seat switch assembly. (Fold Switch (RH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  19. CHECK FOLD SEAT CONTROL ECU (RH SEAT)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S88-6 (FOLD) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  20. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (RH SEAT) - NO. 1 FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the k3 fold seat control ECU (RH seat) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      k3-12 (FOLD) - S88-6 (FOLD) Always Below 1 Ω
      k3-12 (FOLD) or S88-6 (FOLD) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (RH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  21. INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (RH))


    1. Remove the No. 1 fold seat switch assembly.

      Click here

    2. Inspect the No. 1 fold seat switch assembly. (Return Switch (RH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  22. CHECK FOLD SEAT CONTROL ECU (RH SEAT)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S88-1 (RTRN) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  23. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (RH SEAT) - NO. 1 FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the k3 fold seat control ECU (RH seat) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      k3-7 (RTRN) - S88-1 (RTRN) Always Below 1 Ω
      k3-7 (RTRN) or S88-1 (RTRN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (RH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  24. INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (FOLD SWITCH (LH))


    1. Remove the No. 1 fold seat switch assembly.

      Click here

    2. Inspect the No. 1 fold seat switch assembly. (Fold switch (LH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  25. CHECK FOLD SEAT CONTROL ECU (LH SEAT)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S88-8 (FOLD) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  26. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (LH SEAT) - NO. 1 FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the m4 fold seat control ECU (LH seat) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      m4-12 (FOLD) - S88-8 (FOLD) Always Below 1 Ω
      m4-12 (FOLD) or S88-8 (FOLD) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (LH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  27. INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY (RETURN SWITCH (LH))


    1. Remove the No. 1 fold seat switch assembly.

      Click here

    2. Inspect the No. 1 fold seat switch assembly. (Return Switch (LH))

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  28. CHECK FOLD SEAT CONTROL ECU (LH SEAT)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S88-3 (RTRN) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  29. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU (LH SEAT) - NO. 1 FOLD SEAT SWITCH ASSEMBLY)


    1. Disconnect the m4 fold seat control ECU (LH seat) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      m4-7 (RTRN) - S88-3 (RTRN) Always Below 1 Ω
      m4-7 (RTRN) or S88-3 (RTRN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU (LH SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR