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Home >> Lexus >> 2014 >> ES 350 >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seats >> Front Power Seat Control System (W/ Memory) (Diagnostic Codes & Symptom Tests) >> FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) >> Symptom Tests >> Wireless Transmitter Memory Function does not Operate [08/2013 - ] >> Procedure

Wireless Transmitter Memory Function does not Operate [08/2013 - ]: Procedure

  1. CHECK POWER DOOR LOCK CONTROL SYSTEM 
    1. Check the manual lock/unlock function by using the door control switch (multiplex network master switch assembly). Refer to OPERATION CHECK [08/2013 - ] .

      OK

      Manual lock/unlock function operates normally.

    NG → See step   15 

    OK: Go to next step 

  2. CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) 
    1. Check that the engine starts normally when the engine switch is pressed while carrying the key and while the brake pedal is depressed.

      OK

      Engine starts normally.

    NG → See step   18 

    OK: Go to next step 

  3. CHECK SEAT POSITION MEMORY FUNCTION 
    1. Store a seat position in memory. Refer to OPERATION CHECK [08/2013 - ] .
    2. Check that the buzzer sounds for 0.5 seconds to indicate that a position has been stored.
      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 position memory function operates normally.

    NG → See step   19 

    OK: Go to next step 

  4. CHECK SEAT POSITION RESTORING FUNCTION 
    1. Restore a memorized seat position. Refer to OPERATION CHECK [08/2013 - ] .
    2. Check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position.
      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 restoring operation has failed, release all switches. The seat memory restoring function does not operate unless the switches are released.

      OK

      Seat position restoring function operates normally.

    NG → See step   14 

    OK: Go to next step 

  5. READ VALUE USING TECHSTREAM (DRIVER DOOR COURTESY SWITCH) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Data List.
    5. Read the Data List according to the display on the Techstream.
      MAIN BODY

      Tester Connection Measurement Item/Range Normal Condition Diagnostic Note
      FL Door Courtesy SW Front door courtesy light switch assembly (for LH) signal / ON or OFF ON: Driver door open
      OFF: Driver door closed
      -

      OK

      ON or OFF appears on the screen according to the driver door condition.

    NG → See step   13 

    OK: Go to next step 

  6. CHECK MEMORY CALL REGISTRATION FUNCTION 
    1. When the following conditions are met, press the manual lock or unlock switch on the multiplex network master switch assembly.
      • Engine switch is off
      • Press and hold the M1, M2 or M3 seat memory switch
      • Driver door closed
      • Carry the key
    2. Check that the buzzer sounds for 0.5 seconds to indicate the completion of memory call registration. Refer to OPERATION CHECK [08/2013 - ] .

      OK

      Buzzer sounds normally.

    NG → See step   9 

    OK: Go to next step 

  7. READ VALUE USING TECHSTREAM (MEMORY CALL REGISTRATION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Data List.
    5. Read the Data List according to the display on the Techstream.
      MAIN BODY

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Mem SW No. w/KeyID1 Memory switch linked with key ID1 / NONE, MEM SW1, MEM SW2, or MEM SW3 NONE: No switches linked with key ID1
      MEM SW1: M1 switch linked with key ID1
      MEM SW2: M2 switch linked with key ID1
      MEM SW3: M3 switch linked with key ID1
      -
      Mem SW No. w/KeyID2 Memory switch linked with key ID2 / NONE, MEM SW1, MEM SW2, or MEM SW3 NONE: No switches linked with key ID2
      MEM SW1: M1 switch linked with key ID2
      MEM SW2: M2 switch linked with key ID2
      MEM SW3: M3 switch linked with key ID2
      -
      Mem SW No. w/KeyID3 Memory switch linked with key ID3 / NONE, MEM SW1, MEM SW2, or MEM SW3 NONE: No switches linked with key ID3
      MEM SW1: M1 switch linked with key ID3
      MEM SW2: M2 switch linked with key ID3
      MEM SW3: M3 switch linked with key ID3
      -
      Mem SW No. w/KeyID4 Memory switch linked with key ID4 / NONE, MEM SW1, MEM SW2, or MEM SW3 NONE: No switches linked with key ID4
      MEM SW1: M1 switch linked with key ID4
      MEM SW2: M2 switch linked with key ID4
      MEM SW3: M3 switch linked with key ID4
      -
      Mem SW No. w/KeyID5 Memory switch linked with key ID5 / NONE, MEM SW1, MEM SW2, or MEM SW3 NONE: No switches linked with key ID5
      MEM SW1: M1 switch linked with key ID5
      MEM SW2: M2 switch linked with key ID5
      MEM SW3: M3 switch linked with key ID5
      -
      Mem SW No. w/KeyID6 Memory switch linked with key ID6 / NONE, MEM SW1, MEM SW2, or MEM SW3 NONE: No switches linked with key ID6
      MEM SW1: M1 switch linked with key ID6
      MEM SW2: M2 switch linked with key ID6
      MEM SW3: M3 switch linked with key ID6
      -
      Mem SW No. w/KeyID7 Memory switch linked with key ID7 / NONE, MEM SW1, MEM SW2, or MEM SW3 NONE: No switches linked with key ID7
      MEM SW1: M1 switch linked with key ID7
      MEM SW2: M2 switch linked with key ID7
      MEM SW3: M3 switch linked with key ID7
      -

      OK

      On the Techstream display, it is confirmed that the memory call has been registered.

    NG → See step   16 

    OK: Go to next step 

  8. CHECK MEMORY CALL FUNCTION 
    1. Turn the engine switch off.
    2. Close and lock all doors.
    3. Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle while holding the memory call registered key.
    4. Open the driver door and check that the driver seat moves to the memorized position. Refer to OPERATION CHECK [08/2013 - ] .

      OK

      Driver seat moves to the memorized position.

    NG → See step   17 

    OK → See step   20 

  9. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Replace the main body ECU (multiplex network body ECU). Refer to REMOVAL [08/2013 - ] .

    NEXT: Go to next step 

  10. CHECK MEMORY CALL REGISTRATION FUNCTION 
    1. When the following conditions are met, press the manual lock or unlock switch on the multiplex network master switch assembly.
      • Engine switch is off
      • Press and hold the M1, M2 or M3 seat memory switch
      • Driver door closed
      • Carry the key
    2. Check that the buzzer sounds for 0.5 seconds to indicate the completion of memory call registration. Refer to OPERATION CHECK [08/2013 - ] .

      OK

      Buzzer sounds normally.

    NG → See step   11 

    OK → END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE) 

  11. REPLACE FRONT POWER SEAT SWITCH LH 
    1. Replace the front power seat switch LH. Refer to REMOVAL [08/2013 - ] .

    NEXT: Go to next step 

  12. CHECK MEMORY CALL REGISTRATION FUNCTION 
    1. When the following conditions are met, press the manual lock or unlock switch on the multiplex network master switch assembly.
      • Engine switch is off
      • Press and hold the M1, M2 or M3 seat memory switch
      • Driver door closed
      • Carry the key
    2. Check that the buzzer sounds for 0.5 seconds to indicate the completion of memory call registration. Refer to OPERATION CHECK [08/2013 - ] .

      OK

      Buzzer sounds normally.

    NG → See step   21 

    OK → END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE) 

  13. GO TO LIGHTING SYSTEM (Front Door Courtesy Switch Circuit). Refer to  Front Door Courtesy Switch Circuit [08/2013 - ] 
  14. GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat does not Return to Memorized Position). Refer to  Power Seat does not Return to Memorized Position [08/2013 - ]  
  15. GO TO POWER DOOR LOCK CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 
  16. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [08/2013 - ] 
  17. GO TO OTHER DIAGNOSIS PROCEDURE (Wireless-linked Return Function does not Operate). Refer to  Wireless-linked Return Function does not Operate [08/2013 - ]  
  18. GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 
  19. GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized). Refer to  Power Seat Position is not Memorized [08/2013 - ]  
  20. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 
  21. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [08/2013 - ]