TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) Indicator Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01KBUTE01
*a from IG1 NO. 1 Relay
*b ECU-IG NO. 1
*c Telltale Light Assembly
*d Clearance Warning ECU Assembly

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. A01KDLSC02
      *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 (CLEARANCE WARNING ECU ASSEMBLY - TELLTALE LIGHT ASSEMBLY)


    1. Disconnect the G33 clearance warning ECU assembly connector.

    2. Disconnect the G43 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G33-7 (L1) - G43-4 (RR) Always Below 1 Ω
      G33-8 (L2) - G43-2 (RL) Always Below 1 Ω
      G33-10 (L10) - G43-5 (OP) Always Below 1 Ω
      G33-23 (L3) - G43-3 (BK) Always Below 1 Ω
      G33-7 (L1) - Body ground Always 10 kΩ or higher
      G33-8 (L2) - Body ground Always 10 kΩ or higher
      G33-10 (L10) - Body ground Always 10 kΩ or higher
      G33-23 (L3) - 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