TOYOTA PARKING ASSIST-SENSOR SYSTEM(except Hatchback) Clearance Warning Buzzer Circuit

DTC Code DTC Name
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

E267067E01

CAUTION / NOTICE / HINT

Note:

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

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 GTSClick here

    B

  2. PERFORM ACTIVE TEST USING GTS

    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 / Clearance Sonar/Simple-IPA. / Active Test.

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

      Body Electrical > Clearance Sonar / Simple-IPA. > 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 > Clearance Sonar / Simple-IPA. > 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 E98 clearance warning ECU assembly connector.

    2. Disconnect the E99 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

      E98-12 (CBZ) - E99-1 (Z+)

      Always

      Below 1 Ω

      E98-6 (EF) - E99-2 (Z-)

      Always

      Below 1 Ω

      E98-12 (CBZ) - Body ground

      Always

      10 kΩ or higher

      E98-6 (EF) - 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.

      for Wagon:Click here

      for Sedan:Click here

    Result

    Proceed to

    NEXT
    NEXT

  5. PERFORM ACTIVE TEST USING GTS

    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 / Clearance Sonar/Simple-IPA. / Active Test.

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

      Body Electrical > Clearance Sonar / Simple-IPA. > 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 > Clearance Sonar / Simple-IPA. > Active Test

      Tester Display

      Front Buzzer

      OK

      The No. 1 clearance warning buzzer sounds.

    Result

    Result

    Proceed to

    OK

    A

    NG

    B
    A

    END (NO. 1 CLEARANCE WARNING BUZZER WAS DEFECTIVE)

    B

    REPLACE CLEARANCE WARNING ECU ASSEMBLY

    for Wagon LHD:Click here

    for Wagon RHD:Click here

    for Sedan:Click here

  6. PERFORM ACTIVE TEST USING GTS

    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 / Clearance Sonar/Simple-IPA. / Active Test.

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

      Body Electrical > Clearance Sonar / Simple-IPA. > 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 > Clearance Sonar / Simple-IPA. > 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 E98 clearance warning ECU assembly connector.

    2. Disconnect the L41 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

      E98-13 (BBZ) - L41-1 (Z+)

      Always

      Below 1 Ω

      E98-5 (ER) - L41-2 (Z-)

      Always

      Below 1 Ω

      E98-13 (BBZ) - Body ground

      Always

      10 kΩ or higher

      E98-5 (ER) - 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.

      for Wagon:Click here

      for Sedan:Click here

    Result

    Proceed to

    NEXT
    NEXT

  9. PERFORM ACTIVE TEST USING GTS

    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 / Clearance Sonar/Simple-IPA. / Active Test.

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

      Body Electrical > Clearance Sonar / Simple-IPA. > 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 > Clearance Sonar / Simple-IPA. > Active Test

      Tester Display

      Rear Buzzer

      OK

      The No. 2 clearance warning buzzer sounds.

    Result

    Result

    Proceed to

    OK

    A

    NG

    B
    A

    END (NO. 2 CLEARANCE WARNING BUZZER WAS DEFECTIVE)

    B

    REPLACE CLEARANCE WARNING ECU ASSEMBLY

    for Wagon LHD:Click here

    for Wagon RHD:Click here

    for Sedan:Click here