TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) 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

A01QR2NE14
*a No. 1 Clearance Warning Buzzer
*b Clearance Warning ECU Assembly

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.

      Click here

    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 Click here