TOYOTA PARKING ASSIST-SENSOR SYSTEM Clearance Warning Buzzer Circuit

DESCRIPTION

The rear clearance warning ECU assembly receives the No. 1 ultrasonic sensor signal to sound the No. 1 clearance warning buzzer.

WIRING DIAGRAM

A01J7KUE05

INSPECTION PROCEDURE

PROCEDURE


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


    1. A01J57JE09

      Disconnect the C8 No. 1 clearance warning buzzer connector.

    2. A01J5BQE80

      Disconnect the C25 rear 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
      C8-2 - C25-12 (BBZ) Always Below 1 Ω
      C8-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (NO. 1 CLEARANCE WARNING BUZZER - BATTERY)


    1. A01J57JE04

      Disconnect the C8 No. 1 clearance warning buzzer connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C8-1 - Body ground Ignition switch ON 11 to 14 V
      C8-1 - Body ground Ignition switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE NO. 1 CLEARANCE WARNING BUZZER


    1. Replace the No. 1 clearance warning buzzer Click here.


    NEXT

  4. CHECK NO. 1 CLEARANCE WARNING BUZZER OPERATION


    1. Check that the No. 1 clearance warning buzzer sounds.

      OK
      No. 1 clearance warning buzzer sounds.

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    OK

    END (NO. 1 CLEARANCE WARNING BUZZER IS DEFECTIVE)