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

DTC Code DTC Name
Taillight Relay Circuit

DESCRIPTION

This is the power source circuit of the clearance warning ECU assembly.

WIRING DIAGRAM

E270571E01

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. CHECK TAILLIGHT

    1. Turn the light control switch to the TAIL position.

    2. Check that the taillight turns on.

      OK

      Taillight turns on.

    Result

    Proceed to

    OK

    NG
    NG

    GO TO LIGHTING SYSTEM

    Click hereClick here

    OK

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

    1. E270561C01

      *a

      Front view of wire harness connector

      (to Clearance Warning ECU Assembly)

      Disconnect the G33 clearance warning ECU assembly connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G33-20 (TL) - Body ground

      Ignition switch ON, light control switch TAIL

      11 to 14 V

      Ignition switch ON, light control switch off

      Below 1 V

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR