ENGINE IMMOBILISER SYSTEM(w/ Entry and Start System) Certification ECU Power Source Circuit

DESCRIPTION

This circuit provides power to the certification ECU.

WIRING DIAGRAM

A004QC9E01

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 (CERTIFICATION ECU - BATTERY AND BODY GROUND)


    1. A004RTIE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Certification ECU)

      Disconnect the D54 ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D54-1 (+B) - Body ground Always 11 to 14 V
      D54-16 (IG) - Body ground Engine switch off Below 1 V
      D54-16 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      D54-17 (CUTB) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D54-15 (E) - Body ground Always Below 1 Ω

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR