TOYOTA PARKING ASSIST-SENSOR SYSTEM 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

A002MZCE08
*a No. 1 Clearance Warning Buzzer
*b Clearance Warning ECU

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


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


    1. Disconnect the H96 No. 1 clearance warning buzzer connector.

    2. Disconnect the H95 clearance warning ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H96-1 (Z+) - H95-19 (CBZ) Always Below 1 Ω
      H96-2 (Z-) - H95-20 (EF) Always Below 1 Ω
      H96-1 (Z+) - Body ground Always 10 kΩ or higher
      H96-2 (Z-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT 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.

      OK
      Buzzer sounds properly.

    OK

    END (NO. 1 CLEARANCE WARNING BUZZER IS DEFECTIVE)

    NG

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