TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) Clearance Warning Buzzer Circuit

DTC Code DTC Name
Clearance Warning Buzzer Circuit

DESCRIPTION

The clearance warning buzzer sounds to alert the driver. The sounding pattern changes depending on the distance to an obstacle.

WIRING DIAGRAM

E220929E14

PROCEDURE

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

    1. Disconnect the G34 No. 1 clearance warning buzzer connector.

    2. Disconnect the G33 clearance warning ECU assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G33-1 (BBZ) - G34-1

      Always

      Below 1 Ω

      G33-2 (ER) - G34-2

      Always

      Below 1 Ω

      G33-1 (BBZ) - Body ground

      Always

      10 kΩ or higher

      G33-2 (ER) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK NO. 1 CLEARANCE WARNING BUZZER

    1. Temporarily replace the No. 1 clearance warning buzzer with a new or normally functioning one.

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    2. Check that the clearance warning buzzer sounds properly when the Toyota parking assist-sensor system detects an obstacle.

    Result

    Proceed to

    Buzzer sounds properly

    Buzzer does not sound properly
    Buzzer sounds properly

    END (NO. 1 CLEARANCE WARNING BUZZER IS DEFECTIVE)

    Buzzer does not sound properly

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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