TOYOTA PARKING ASSIST-SENSOR SYSTEM Indicator Circuit

DESCRIPTION

The warning indicator lights are installed in the telltale light assembly.

WIRING DIAGRAM

A002NYSE03
*a from ECU-IG NO.2 Fuse
*b Telltale Light Assembly
*c Clearance Warning ECU

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 - BATTERY)


    1. A002OSDE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      Disconnect the H122 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
      H122-4 (B) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the H95 clearance warning ECU connector.

    2. Disconnect the H122 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H95-28 (L1) - H122-11 (RR) Always Below 1 Ω
      H95-29 (L2) - H122-13 (RL) Always Below 1 Ω
      H95-30 (L3) - H122-10 (BK) Always Below 1 Ω
      H95-9 (L4) - H122-1 (FR) Always Below 1 Ω
      H95-26 (L5) - H122-3 (FL) Always Below 1 Ω
      H95-27 (L6) - H122-2 (BD) Always Below 1 Ω
      H95-31 (L10) - H122-12 (OP) Always Below 1 Ω
      H95-28 (L1) - Body ground Always 10 kΩ or higher
      H95-29 (L2) - Body ground Always 10 kΩ or higher
      H95-30 (L3) - Body ground Always 10 kΩ or higher
      H95-9 (L4) - Body ground Always 10 kΩ or higher
      H95-26 (L5) - Body ground Always 10 kΩ or higher
      H95-27 (L6) - Body ground Always 10 kΩ or higher
      H95-31 (L10) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TELLTALE LIGHT ASSEMBLY


    1. Remove the telltale light assembly Click here.

    2. Inspect the indicator operation Click here.


    OK

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

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here