LEXUS PARKING ASSIST-SENSOR SYSTEM ECU Power Source Circuit

DESCRIPTION

This circuit is the power source circuit to operate the parking assist ECU.

WIRING DIAGRAM

A01EPE4E03

INSPECTION PROCEDURE

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. A01EMY0E16
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the F74 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F74-4 (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
      F74-1 (+B) - F74-4 (GND1) Always 11 to 14 V
      F74-8 (IG) - F74-4 (GND1) Engine switch on (IG) 11 to 14 V
      F74-9 (ACC) - F74-4 (GND1) Engine switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here