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TOYOTA PARKING ASSIST-SENSOR SYSTEM Clearance Warning Buzzer Circuit

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DTC Code DTC Name
  Clearance Warning Buzzer Circuit
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DESCRIPTION

The No. 1 clearance warning buzzer sounds to alert the driver and the buzzed frequency changes depending on the distance to an obstacle.

A0157YGE02
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (NO. 1 CLEARANCE WARNING BUZZER)


    1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the buzzer operates (Click here).

      Table 1. Clearance Sonar
      Tester Display Test Part Control Range Diagnostic Note
      Front Buzzer No. 1 clearance warning buzzer Operate or Stop -
      OK
      No. 1 clearance warning buzzer sounds.
      Table 2. Result
      Result Proceed to
      OK A
      NG (w/ Side Monitor System) B
      NG (w/o Side Monitor System) C

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    CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - NO. 1 CLEARANCE WARNING BUZZER)


    1. Disconnect the F75 parking assist ECU connector.

    2. Disconnect the E10 No. 1 clearance warning buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F75-7 (BBZ) - E10-1 (Z+) Always Below 1 Ω
      F75-6 (EF) - E10-2 (Z-) Always Below 1 Ω
      F75-7 (BBZ) - Body ground Always 10 kΩ or higher
      F75-6 (EF) - Body ground Always 10 kΩ or higher

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    CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 1 CLEARANCE WARNING BUZZER)


    1. Disconnect the F12 clearance warning ECU connector.

    2. Disconnect the E10 No. 1 clearance warning buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F12-10 (BBZ) - E10-1 (Z+) Always Below 1 Ω
      F12-11 (EF) - E10-2 (Z-) Always Below 1 Ω
      F12-10 (BBZ) - Body ground Always 10 kΩ or higher
      F12-11 (EF) - Body ground Always 10 kΩ or higher

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    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

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    REPLACE NO. 1 CLEARANCE WARNING BUZZERClick here

  6. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR