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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Theft Deterrent / Keyless Entry >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) >> Driver Side Door Entry Unlock Function does not Operate >> Inspection Procedure

Inspection Procedure

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

      OK: Door locks operate normally. 

    NG: GO TO POWER DOOR LOCK CONTROL SYSTEM  (See PROBLEM SYMPTOMS TABLE )

    OK: Go to next step 

  2. READ VALUE USING TECHSTREAM (TOUCH SENSOR) 
    1. Using the Techstream, read the Data List.

      Smart Access 

      TESTER DISPLAY CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D-Door Touch Sensor Driver side door touch sensor / ON or OFF ON: Touch sensor touched
      OFF: Touch sensor not touched      		 -

      OK: "ON" (sensor is touched) and "OFF" (sensor is not touched) appears on the screen. 

    NG: Go to step 3 

    OK: REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)  (See REMOVAL  )

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - DOOR ELECTRICAL KEY OSCILLATOR) 
    1. Disconnect the E29 ECU connector.
    2. Disconnect the z24 oscillator connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E29-5 (SEL1) - z24-4 (SEL) Always Below 1 Ω
      E29-22 (SEN1) - z24-6 (SENS) Always Below 1 Ω
      E29-5 (SEL1) - Body ground Always 10 kΩ or higher
      E29-22 (SEN1) - Body ground Always 10 kΩ or higher
      Fig 1: Identifying E29 ECU Connector And z24 Oscillator Connector
      G05630880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - FRONT DOOR OUTSIDE HANDLE) 
    1. Disconnect the z23 handle connector.
    2. Disconnect the z24 oscillator connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      z23-6 (SGT) - z24-2 (SGT) Always Below 1 Ω
      z23-6 (SGT) - Body ground Always 10 kΩ or higher
      Fig 2: Identifying z23 Handle Connector And z24 Oscillator Connector
      G05630881Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. REPLACE DOOR ELECTRICAL KEY OSCILLATOR 
    1. Replace the door electrical key oscillator (See DISASSEMBLY ).
  6. CHECK DOOR ELECTRICAL KEY OSCILLATOR OPERATION 
    1. Check that the entry function operates normally.

      OK: Operates normally. 

    NG: Go to step 7 

    OK: END (DOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE) 

  7. REPLACE FRONT DOOR OUTSIDE HANDLE 
    1. Replace the front door outside handle (See DISASSEMBLY ).
  8. CHECK FRONT DOOR OUTSIDE HANDLE OPERATION 
    1. Check that the entry function operates normally.

      OK: Operates normally. 

    NG: REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)  (See REMOVAL  )

    OK: END (FRONT DOOR OUTSIDE HANDLE IS DEFECTIVE) 

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