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HOMESERVICE MANUALSLEXUS2010LS 460L AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTWARNING SYSTEMSINTUITIVE PARKING ASSIST (DIAGNOSTIC CODES & CIRCUIT TESTS)INTUITIVE PARKING ASSIST SYSTEMNO. 2 CLEARANCE WARNING BUZZER CIRCUITPROCEDURE
2010 Lexus LS 460L AWD

No. 2 Clearance Warning Buzzer Circuit: Procedure

2010 Lexus LS 460L AWDSECTION Procedure
  1. PERFORM ACTIVE TEST USING TECHSTREAM (WARNING BUZZER) 
    1. Select the Active Test, use the Techstream to generate a control command, and then check that the buzzer operates.
      INTUITIVE P/A

      Tester Display Test Part Control Range Diagnostic Note
      Rear Buzzer Rear clearance warning buzzer Operate or Stop -

      OK

      Rear clearance warning buzzer sounds.

    NG → See step   2 

    OK → See step   7 

  2. SYSTEM CHECK 
    1. Check if the vehicle is equipped with the advanced parking guidance system.
      RESULT

      Result Proceed to
      w/o Advanced parking guidance system A
      w/ Advanced parking guidance system B

    B → See step   5 

    A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - REAR CLEARANCE WARNING BUZZER) 
    1. Disconnect the L19 ECU connector.
      Fig 1: Identifying L19 Clearance Warning ECU And R21 Rear Clearance Warning Buzzer Connector Terminals
      GTY152779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the R21 buzzer connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      L19-10 (BBZ) - R21-1 (Z+) Always Below 1 Ω
      L19-11 (EF) - R21-2 (Z-) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. REPLACE REAR CLEARANCE WARNING BUZZER 
    1. Temporarily replace the rear clearance warning buzzer with a new or normally functioning one. Refer to REMOVAL .
    2. Check the clearance warning buzzer sounds.

      OK

      Rear clearance warning buzzer sounds.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → END (REAR CLEARANCE WARNING BUZZER IS DEFECTIVE) 

  5. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - REAR CLEARANCE WARNING BUZZER) 
    1. Disconnect the L91 ECU connector.
      Fig 2: Identifying L91 ECU Connector And R21 Buzzer Connector
      GTY125926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the R21 buzzer connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      L91-25 (BBZ) - R21-1 (Z+) Always Below 1 Ω
      L91-9 (EF) - R21-2 (Z-) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. REPLACE REAR CLEARANCE WARNING BUZZER 
    1. Temporarily replace the rear clearance warning buzzer with a new or normally functioning one. Refer to REMOVAL .
    2. Check the clearance warning buzzer sounds.

      OK

      Rear clearance warning buzzer sounds.

    NG → See step   7 

    OK → END (REAR CLEARANCE WARNING BUZZER IS DEFECTIVE) 

  7. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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