TOYOTA PARKING ASSIST-SENSOR SYSTEM(for Sedan with Simple Intelligent Parking Assist System) Clearance Sonar Main Switch Circuit

DTC Code DTC Name
Clearance Sonar Main Switch Circuit

DESCRIPTION

The back sonar or clearance sonar switch assembly is installed at the base of the driver side of the instrument panel.

When the back sonar or clearance sonar switch assembly is turned on, an on signal is sent to the clearance warning ECU assembly. The Toyota parking assist-sensor system operates according to this signal.

WIRING DIAGRAM

E222388E28

CAUTION / NOTICE / HINT

Note:

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

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

    Click here

PROCEDURE

  1. INSPECT BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

    1. Remove the back sonar or clearance sonar switch assembly.

      Click here

    2. E197324C05

      *a

      Component without harness connected

      (Back Sonar or Clearance Sonar Switch Assembly)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      9 (IG) - 6 (ECU)

      Back sonar or clearance sonar switch assembly on

      Below 1 Ω

      9 (IG) - 6 (ECU)

      Back sonar or clearance sonar switch assembly off

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

    Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY POWER SOURCE)

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E100-9 (IG) - Body ground

      Ignition switch ON

      11 to 14 V

      E100-9 (IG) - Body ground

      Ignition switch off

      Below 1 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY - CLEARANCE WARNING ECU ASSEMBLY)

    1. Disconnect the E98 clearance warning ECU assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E98-10 (CLSW) - E100-6 (ECU)

      Always

      Below 1 Ω

      E98-10 (CLSW) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    Proceed to

    OK

    A

    NG

    B
    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY

    Click here

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR