FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) Power Seat Position is not Memorized

DESCRIPTION


WIRING DIAGRAM

A01NHI9E03
A01NHI9E02

INSPECTION PROCEDURE

Note


  • The seat position will not be recorded if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.

  • If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Use the intelligent tester to check if the CAN communication system is functioning normally Click here.

      OK
      CAN communication DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK SEAT MEMORY FUNCTION


    1. Perform a memory operation properly. Check that the buzzer sounds to indicate the completion of the memory operation Click here.

      Tech Tips


      • The seat position will not be recorded if the SET switch and 2 or more of the memory switches (for example, M1 and M2) are pressed simultaneously.

      • If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released .

      OK
      Seat memory switch function operates normally.
      Result
      Result Proceed to
      NG (Driver side seat memory function does not operate) A
      NG (Passenger side seat memory function does not operate) B
      OK C

    B

    CHECK POWER SEAT CONTROL FUNCTION Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK POWER SEAT CONTROL FUNCTION


    1. Check that each function of the power seat operates normally by using the front power seat switch Click here.

      OK
      Each function of power seat operates normally by using front power seat switch.

    NG

    GO TO OTHER FLOW CHART (Power Seat does not Operate with Front Power Seat Switch) Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (MIRROR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Mirror L or R / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Mirror L or R
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SET Switch SET switch signal / ON or OFF

      ON: SET switch on

      OFF: SET switch off

      		 -
      M1 Switch M1 switch signal / ON or OFF

      ON: M1 switch on

      OFF: M1 switch off

      		 -
      M2 Switch M2 switch signal / ON or OFF

      ON: M2 switch on

      OFF: M2 switch off

      		 -
      M3 Switch M3 switch signal / ON or OFF

      ON: M3 switch on

      OFF: M3 switch off

      		 -
      OK
      ON or OFF is displayed on the intelligent tester according to the table above.

    NG

    INSPECT SEAT MEMORY SWITCH (DRIVER SIDE) Click here

    OK

  5. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE)


    1. Replace the outer mirror control ECU assembly (driver side) Click here.


    NEXT

  6. CHECK SEAT MEMORY FUNCTION (SEAT POSITION MEMORY FUNCTION)


    1. Perform a memory operation properly. Check that the buzzer sounds to indicate the completion of the memory operation Click here.

      Note


      • The seat position will not be recorded if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.

      • If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

      OK
      Seat memory switch function operates normally.

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

    END (OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE) WAS DEFECTIVE)

  7. REPLACE FRONT POWER SEAT SWITCH


    1. Replace the front power seat switch Click here.


    NEXT

  8. CHECK SEAT MEMORY FUNCTION


    1. Perform a memory operation properly. Check that the buzzer sounds to indicate the completion of the memory operation Click here.

      Note


      • The seat position will not be recorded if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.

      • If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

      OK
      Seat memory switch function operates normally.

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    OK

    END (FRONT POWER SEAT SWITCH (DRIVER SIDE) WAS DEFECTIVE)

  9. INSPECT SEAT MEMORY SWITCH (DRIVER SIDE)


    1. A01NEL8E10
      Text in Illustration
      *1

      Component without harness connected

      (Seat Memory Switch LH (Driver Side))

      for LHD.


      1. Remove the seat memory switch LH Click here.

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        J5-2 - J5-5 M1 switch pressed Below 1 Ω
        J5-3 - J5-5 M2 switch pressed Below 1 Ω
        J5-4 - J5-5 M3 switch pressed Below 1 Ω
        J5-1 - J5-5 SET switch pressed Below 1 Ω
        J5-2 - J5-5 M1 switch not pressed 10 kΩ or higher
        J5-3 - J5-5 M2 switch not pressed 10 kΩ or higher
        J5-4 - J5-5 M3 switch not pressed 10 kΩ or higher
        J5-1 - J5-5 SET switch not pressed 10 kΩ or higher
    2. A01ND7AE06
      Text in Illustration
      *1

      Component without harness connected

      (Seat Memory Switch RH (Passenger Side))

      for RHD.


      1. Remove the seat memory switch RH Click here.

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        I11-2 - I11-5 M1 switch pressed Below 1 Ω
        I11-3 - I11-5 M2 switch pressed Below 1 Ω
        I11-4 - I11-5 M3 switch pressed Below 1 Ω
        I11-1 - I11-5 SET switch pressed Below 1 Ω
        I11-2 - I11-5 M1 switch not pressed 10 kΩ or higher
        I11-3 - I11-5 M2 switch not pressed 10 kΩ or higher
        I11-4 - I11-5 M3 switch not pressed 10 kΩ or higher
        I11-1 - I11-5 SET switch not pressed 10 kΩ or higher

    NG

    REPLACE SEAT MEMORY SWITCH (DRIVER SIDE) Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY - SEAT MEMORY SWITCH)


    1. A01NFCRE14
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Memory Switch LH)
      *2

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (Driver Side))

      for LHD.


      1. Disconnect the J3 connector from the outer mirror control ECU assembly (driver side).

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J5-1 - J3-1 (MM) Always Below 1 Ω
        J5-2 - J3-2 (M1) Always Below 1 Ω
        J5-3 - J3-3 (M2) Always Below 1 Ω
        J5-4 - J3-4 (M3) Always Below 1 Ω
        J5-5 - J3-13 (MSWE) Always Below 1 Ω
        J3-1 (MM) - Body ground Always 10 kΩ or higher
        J3-2 (M1) - Body ground Always 10 kΩ or higher
        J3-3 (M2) - Body ground Always 10 kΩ or higher
        J3-4 (M3) - Body ground Always 10 kΩ or higher
        J3-13 (MSWE) - Body ground Always 10 kΩ or higher
    2. A01NFCRE13
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Memory Switch RH)
      *2

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (Driver Side))

      for RHD.


      1. Disconnect the I4 connector from the outer mirror control ECU assembly (driver side).

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        I11-1 - I4-1 (MM) Always Below 1 Ω
        I11-2 - I4-2 (M1) Always Below 1 Ω
        I11-3 - I4-3 (M2) Always Below 1 Ω
        I11-4 - I4-4 (M3) Always Below 1 Ω
        I11-5 - I4-13 (MSWE) Always Below 1 Ω
        I4-1 (MM) - Body ground Always 10 kΩ or higher
        I4-2 (M1) - Body ground Always 10 kΩ or higher
        I4-3 (M2) - Body ground Always 10 kΩ or higher
        I4-4 (M3) - Body ground Always 10 kΩ or higher
        I4-13 (MSWE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH (DRIVER SIDE) Click here

  11. CHECK POWER SEAT CONTROL FUNCTION


    1. Check that each function of the power seat operates normally by using the front power seat switch Click here.

      OK
      Each function of power seat operates normally by using front power seat switch.

    NG

    GO TO OTHER FLOW CHART (Front Power Seat does not Operate with Front Power Seat Switch) Click here

    OK

  12. READ VALUE USING INTELLIGENT TESTER (MIRROR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Mirror L or R / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Mirror L or R
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SET Switch SET switch signal / ON or OFF

      ON: SET switch on

      OFF: SET switch off

      		 -
      M1 Switch M1 switch signal / ON or OFF

      ON: M1 switch on

      OFF: M1 switch off

      		 -
      M2 Switch M2 switch signal / ON or OFF

      ON: M2 switch on

      OFF: M2 switch off

      		 -
      M3 Switch M3 switch signal / ON or OFF

      ON: M3 switch on

      OFF: M3 switch off

      		 -
      OK
      ON or OFF is displayed on the intelligent tester according to the table above.

    NG

    READ VALUE USING INTELLIGENT TESTER Click here

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

  13. READ VALUE USING INTELLIGENT TESTER


    1. Enter the following menus: Body / Passenger Seat / Data List.

    2. Read the Data List according to the display on the intelligent tester.

      Passenger Seat
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seat Memory No1 Seat position memorized with M1 switch / Mem or Not Mem

      Mem: Memorized

      Not Mem: Not memorized

      		 -
      Seat Memory No2 Seat position memorized with M2 switch / Mem or Not Mem

      Mem: Memorized

      Not Mem: Not memorized

      		 -
      Seat Memory No3 Seat position memorized with M3 switch / Mem or Not Mem

      Mem: Memorized

      Not Mem: Not memorized

      		 -

    NG

    INSPECT SEAT MEMORY SWITCH (FRONT PASSENGER SIDE) Click here

    OK

  14. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER SIDE)


    1. Replace the outer mirror control ECU assembly (front passenger side) Click here.


    NEXT

  15. CHECK SEAT MEMORY FUNCTION (SEAT POSITION MEMORY FUNCTION)


    1. Perform a memory operation properly. Check that the buzzer sounds to indicate the completion of the memory operation Click here.

      Note


      • The seat position will not be recorded if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.

      • If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

      OK
      Seat memory switch function operates normally.

    NG

    REPLACE FRONT POWER SEAT SWITCH (FRONT PASSENGER SIDE) Click here

    OK

    END (OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER SIDE) WAS DEFECTIVE

  16. INSPECT SEAT MEMORY SWITCH (FRONT PASSENGER SIDE)


    1. A01ND7AE05
      Text in Illustration
      *1

      Component without harness connected

      (Seat Memory Switch RH)

      for LHD.


      1. Remove the seat memory switch RH Click here.

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        I11-2 - I11-5 M1 switch pressed Below 1 Ω
        I11-3 - I11-5 M2 switch pressed Below 1 Ω
        I11-4 - I11-5 M3 switch pressed Below 1 Ω
        I11-1 - I11-5 SET switch pressed Below 1 Ω
        I11-2 - I11-5 M1 switch not pressed 10 kΩ or higher
        I11-3 - I11-5 M2 switch not pressed 10 kΩ or higher
        I11-4 - I11-5 M3 switch not pressed 10 kΩ or higher
        I11-1 - I11-5 SET switch not pressed 10 kΩ or higher
    2. A01NEL8E09
      Text in Illustration
      *1

      Component without harness connected

      (Seat Memory Switch LH)

      for RHD.


      1. Remove the seat memory switch LH Click here.

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        J5-2 - J5-5 M1 switch pressed Below 1 Ω
        J5-3 - J5-5 M2 switch pressed Below 1 Ω
        J5-4 - J5-5 M3 switch pressed Below 1 Ω
        J5-1 - J5-5 SET switch pressed Below 1 Ω
        J5-2 - J5-5 M1 switch not pressed 10 kΩ or higher
        J5-3 - J5-5 M2 switch not pressed 10 kΩ or higher
        J5-4 - J5-5 M3 switch not pressed 10 kΩ or higher
        J5-1 - J5-5 SET switch not pressed 10 kΩ or higher

    NG

    REPLACE SEAT MEMORY SWITCH (FRONT PASSENGER SIDE) Click here

    OK

  17. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY - SEAT MEMORY SWITCH)


    1. A01NFCRE12
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Memory Switch RH)
      *2

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (Front Passenger Side))

      for LHD.


      1. Disconnect the I4 connector from the outer mirror control ECU assembly (front passenger side).

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        I11-1 - I4-1 (MM) Always Below 1 Ω
        I11-2 - I4-2 (M1) Always Below 1 Ω
        I11-3 - I4-3 (M2) Always Below 1 Ω
        I11-4 - I4-4 (M3) Always Below 1 Ω
        I11-5 - I4-13 (MSWE) Always Below 1 Ω
        I4-1 (MM) - Body ground Always 10 kΩ or higher
        I4-2 (M1) - Body ground Always 10 kΩ or higher
        I4-3 (M2) - Body ground Always 10 kΩ or higher
        I4-4 (M3) - Body ground Always 10 kΩ or higher
        I4-13 (MSWE) - Body ground Always 10 kΩ or higher
    2. A01NFCRE11
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Memory Switch LH)
      *2

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (Front Passenger Side))

      for RHD.


      1. Disconnect the J3 connector from the outer mirror control ECU assembly (front passenger side).

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J5-1 - J3-1 (MM) Always Below 1 Ω
        J5-2 - J3-2 (M1) Always Below 1 Ω
        J5-3 - J3-3 (M2) Always Below 1 Ω
        J5-4 - J3-4 (M3) Always Below 1 Ω
        J5-5 - J3-13 (MSWE) Always Below 1 Ω
        J3-1 (MM) - Body ground Always 10 kΩ or higher
        J3-2 (M1) - Body ground Always 10 kΩ or higher
        J3-3 (M2) - Body ground Always 10 kΩ or higher
        J3-4 (M3) - Body ground Always 10 kΩ or higher
        J3-13 (MSWE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH (FRONT PASSENGER SIDE) Click here