TOYOTA PARKING ASSIST-SENSOR SYSTEM ECU Power Source Circuit

DESCRIPTION

This circuit is the power source circuit to operate the parking assist ECU. The parking assist ECU controls the TOYOTA parking assist-sensor system, parking assist monitor system (w/ Side Monitor System), side monitor system and wide view front monitor system. When a malfunction occurs in this circuit, each system will be abnormal.

WIRING DIAGRAM

A01X4O5E02

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. A01XBDHE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F75-4 (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
      F75-1 (+B) - F75-4 (GND1) Always 11 to 14 V
      F75-8 (IG) - F75-4 (GND1) Engine switch on (IG) 11 to 14 V
      F75-9 (ACC) - F75-4 (GND1) Engine switch on (ACC) 11 to 14 V

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR