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Home >> Lexus >> 2014 >> LX 570 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System With Push-Button Start (Keyless Entry) (Diagnostics & Symptom Tests) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) >> Symptom Tests >> Back Door Entry Lock and Unlock Functions do not Operate [08/2013 - ] >> Procedure

Back Door Entry Lock and Unlock Functions do not Operate [08/2013 - ]: Procedure

  1. CHECK POWER DOOR LOCK OPERATION 
    1. When the door control switch of the master switch assembly is operated, check that the locked doors unlock.

      OK

      Door locks operate normally.

    NG → See step   8 

    OK: Go to next step 

  2. CHECK POWER BACK DOOR OPERATION 
    1. When the power back door switch is operated, check that the power back door open and close.

      OK

      Power back door is open and close.

    NG → See step   10 

    OK: Go to next step 

  3. READ VALUE USING TECHSTREAM (BACK DOOR LOCK SWITCH, BACK DOOR OPENER SWITCH) 
    1. Using the Techstream, read the Data List.
      MAIN BODY

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Handle SW Back door opener switch / ON or OFF ON: Back door opener switch pushed
      OFF: Back door opener switch not pushed      		 -
      SMART ACCESS

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Tr/B-Door Lock SW Back door lock switch / ON or OFF ON: Back door lock switch pushed
      OFF: Back door lock switch not pushed      		 -

      OK

      "ON" (switch is pushed) and "OFF" (switch is not pushed) appears on the screen.

    NG → See step   7 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - OUTSIDE ELECTRICAL KEY ANTENNA) 
    1. Disconnect the E29 ECU connector.
      GTY144104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the K23 antenna connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E29-31 (CLG8) - K23-1 (CLG5) Always Below 1 Ω
      E29-32 (CG8B) - K23-2 (CLGB) Always Below 1 Ω
      E29-31 (CLG8) - Body ground Always 10 kΩ or higher
      E29-32 (CG8B) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. REPLACE ELECTRICAL KEY ANTENNA (for Outside Luggage Compartment) 
    1. Replace the electrical key antenna (for outside luggage compartment). Refer to REMOVAL [08/2013 - ] .

    NEXT: Go to next step 

  6. CHECK ELECTRICAL KEY ANTENNA (for Outside Luggage Compartment) OPERATION 
    1. Check that the entry functions operate normally.

      OK

      Entry functions operate normally.

    NG → REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

    OK → END (ELECTRICAL KEY ANTENNA [for Outside Luggage Compartment] IS DEFECTIVE) 

  7. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND) 
    1. Disconnect the S7 switch connector.
      GTY117099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      S7-2 (L) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   9 

  8. GO TO POWER DOOR LOCK CONTROL SYSTEM. Refer to  PROBLEM SYMPTOMS TABLE [08/2013 - ] 
  9. REPLACE BACK DOOR OPENER SWITCH. Refer to  REMOVAL [08/2013 - ] 
  10. GO TO POWER BACK DOOR SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 
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