TOYOTA PARKING ASSIST-SENSOR SYSTEM Clearance Warning ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the clearance warning ECU assembly.

WIRING DIAGRAM

B003NQIE01

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY - BATTERY AND BODY GROUND)


    1. B003LZMC02
      *a

      Front view of wire harness connector

      (to Back Sonar or Clearance Sonar Switch Assembly)

      Disconnect the back sonar or clearance sonar switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G87-7 (E) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G87-6 (IG) - Body ground Ignition switch ON 11 to 14 V
      G87-6 (IG) - Body ground Ignition switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY


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

      Click here

    2. Inspect the back sonar or clearance sonar switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the G88 clearance warning ECU assembly connector.

    2. Disconnect the G87 back sonar or clearance sonar switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G88-11 (IG) - G87-3 (ECU) Always Below 1 Ω
      G88-16 (E) - Body ground Always Below 1 Ω
      G88-11 (IG) or G87-3 (ECU) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR