REAR VIEW MONITOR SYSTEM(w/ Side Monitor System) ECU Power Source Circuit

DTC Code DTC Name
ECU Power Source Circuit

DESCRIPTION

This circuit is the power source circuit used to operate the parking assist ECU. The parking assist ECU controls the rear view monitor system, wide view front monitor system, side monitor system and LEXUS parking assist-sensor system. When a malfunction occurs in this circuit, each system will be abnormal.

Tip:

  • The parking assist ECU is connected to other ECUs via CAN communication or AVC-LAN communication.

  • If the parking assist ECU does not operate due to a power source problem, other system DTCs may be stored due to a CAN communication interruption.

WIRING DIAGRAM

E158616E10

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 (PARKING ASSIST ECU - BATTERY AND BODY GROUND)

    1. E185668C11

      *a

      Front view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the I3 parking assist ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      I3-3 (GND1) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      I3-1 (+B) - Body ground

      Always

      11 to 14 V

      I3-7 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Engine switch off

      Below 1 V

      I3-8 (ACC) - Body ground

      Engine switch on (ACC)

      11 to 14 V

      Engine switch off

      Below 1 V

    Result

    Result

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR