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

DTC Code DTC Name
Certification ECU Power Source Circuit

DESCRIPTION

This circuit provides power to the certification ECU.

WIRING DIAGRAM

B217872E07

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. U122401E02

      Disconnect the H51 ECU connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      H51-1 (+B) - Body ground

      Always

      11 to 14 V

      H51-16 (IG) - Body ground

      Engine switch off

      Below 1 V

      H51-16 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      H51-17 (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

      H51-15 (E) - Body ground

      Always

      Below 1 Ω
    Table 1. Text in Illustration

    *1

    Front view of wire harness connector

    (to Certification ECU)

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR