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

DESCRIPTION

This circuit is the power source circuit to operate the clearance warning ECU.

WIRING DIAGRAM

A003CXDE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


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


    1. A003EBOE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Sonar or Clearance Sonar Switch)

      Disconnect the D72 switch connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D72-6 (IG) - Body ground Ignition switch ON 11 to 14 V
      D72-6 (IG) - Body ground Ignition switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT BACK SONAR OR CLEARANCE SONAR SWITCH


    1. A003AFVE01
      Text in Illustration
      *1

      Component without harness connected

      (Back Sonar or Clearance Sonar Switch)

      Remove the back sonar or clearance sonar switch.

      Refer to the following procedures for LHD Click here

      Refer to the following procedures for RHD Click here

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      6 (IG) - 3 (ECU) Pressed (on) Below 1 Ω
      6 (IG) - 3 (ECU) Not pressed (off) 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH Click here

    C

    REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH Click here

    A

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


    1. A003BJTE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Sonar or Clearance Sonar Switch)
      *2

      Front view of wire harness connector

      (to Clearance Warning ECU)

      Disconnect the D72 switch connector.

    2. Disconnect the D65 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D72-3 (ECU) - D65-9 (CLSW) Always Below 1 Ω
      D72-7 (E) - D65-23 (OP) Always Below 1 Ω
      D72-3 (ECU) - Body ground Always 10 kΩ or higher
      D72-7 (E) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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