TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) Clearance Warning ECU Power Source Circuit

DESCRIPTION

When the telltale light assembly (clearance sonar main switch) is turned on, the on signal is input into the clearance warning ECU assembly.

WIRING DIAGRAM

A00YRBWE01

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 (TELLTALE LIGHT ASSEMBLY - BATTERY)


    1. A00YRVZC01
      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      Disconnect the telltale light assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G43-9 (LAPB) - Body ground Ignition switch ON 11 to 14 V
      G43-9 (LAPB) - Body ground Ignition switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the G43 telltale light assembly connector.

    2. Disconnect the G33 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
      G43-1 (ECU) - G33-11 (IG) Always Below 1 Ω
      G43-1 (ECU) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TELLTALE LIGHT ASSEMBLY


    1. Remove the telltale light assembly.

      Click here

    2. Inspect the telltale light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here