TOYOTA PARKING ASSIST-SENSOR SYSTEM(w/ Simple Intelligent Parking Assist System) Clearance Warning Buzzer Circuit

DESCRIPTION

This circuit consists of the No. 1 clearance warning buzzer, No. 2 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The ECU operates the buzzers using a sound pattern that changes depending on the distance to the obstacle.

WIRING DIAGRAM

A001V4CE01
*a No. 1 Clearance Warning Buzzer
*b Clearance Warning ECU Assembly
*c No. 2 Clearance Warning Buzzer

CAUTION / NOTICE / HINT

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization may be needed. Refer to Calibration.

Click here

PROCEDURE


  1. CHECK CLEARANCE WARNING BUZZER


    1. Check the operation of the No. 1 and No. 2 clearance warning buzzers.

      Click here

      Result
      Result Proceed to
      Buzzer does not sound when an obstacle is detected in front or at the rear of the vehicle. A
      Buzzer does not sound only when an obstacle is detected in front of the vehicle. B
      Buzzer does not sound only when an obstacle is detected at the rear of the vehicle. C

    A

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

    C

    PERFORM ACTIVE TEST USING GTS (REAR BUZZER) Click here

    B

  2. PERFORM ACTIVE TEST USING GTS (FRONT BUZZER)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / IPA/ICS/Clearance Sonar / Active Test.

    5. Check that the front buzzer operates by performing the Active Test.


      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Front Buzzer No. 1 clearance warning buzzer Stop or Operate Confirm that the vehicle is stopped and the ignition switch is ON

      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display
      Front Buzzer
      OK
      The No. 1 clearance warning buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

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


    1. Disconnect the F37 clearance warning ECU assembly connector.

    2. Disconnect the F35 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
      F37-3 (CBZ) - F35-1 (Z+) Always Below 1 Ω
      F37-4 (EF) - F35-2 (Z-) Always Below 1 Ω
      F37-3 (CBZ) or F35-1 (Z+) - Body ground Always 10 kΩ or higher
      F37-4 (EF) or F35-2 (Z-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE NO. 1 CLEARANCE WARNING BUZZER


    1. Replace the No. 1 clearance warning buzzer with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. PERFORM ACTIVE TEST USING GTS (FRONT BUZZER)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / IPA/ICS / Clearance Sonar / Active Test.

    5. Check that the front buzzer operates by performing the Active Test.


      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Front Buzzer No. 1 clearance warning buzzer Stop or Operate Confirm that the vehicle is stopped and the ignition switch is ON

      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display
      Front Buzzer
      OK
      The No. 1 clearance warning buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

    END (NO. 1 CLEARANCE WARNING BUZZER WAS DEFECTIVE)

    NG

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

  6. PERFORM ACTIVE TEST USING GTS (REAR BUZZER)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / IPA/ICS / Clearance Sonar / Active Test.

    5. Check that the rear buzzer operates by performing the Active Test.


      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Rear Buzzer No. 2 clearance warning buzzer Stop or Operate Confirm that the vehicle is stopped and the ignition switch is ON

      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display
      Rear Buzzer
      OK
      The No. 2 clearance warning buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  7. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 2 CLEARANCE WARNING BUZZER)


    1. Disconnect the F38 clearance warning ECU assembly connector.

    2. Disconnect the F55 No. 2 clearance warning buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F38-15 (BBZ) - F55-1 (Z+) Always Below 1 Ω
      F38-7 (ER) - F55-2 (Z-) Always Below 1 Ω
      F38-15 (BBZ) or F55-1 (Z+) - Body ground Always 10 kΩ or higher
      F38-7 (ER) or F55-2 (Z-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. REPLACE NO. 2 CLEARANCE WARNING BUZZER


    1. Replace the No. 2 clearance warning buzzer with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. PERFORM ACTIVE TEST USING GTS (REAR BUZZER)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / IPA/ICS / Clearance Sonar / Active Test.

    5. Check that the rear buzzer operates by performing the Active Test.


      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Rear Buzzer No. 2 clearance warning buzzer Stop or Operate Confirm that the vehicle is stopped and the ignition switch is ON

      Body Electrical > IPA/ICS/Clearance Sonar > Active Test
      Tester Display
      Rear Buzzer
      OK
      The No. 2 clearance warning buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

    END (NO. 2 CLEARANCE WARNING BUZZER WAS DEFECTIVE)

    NG

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here