THEFT DETERRENT SYSTEM ECU Power Source Circuit

DESCRIPTION

This circuit provides power for main body ECU (network gateway ECU) operation.

WIRING DIAGRAM

A004I62E02
*a from MAIN Fuse
*b BMPX
*c Instrument Panel Junction Block Assembly
*d Main Body ECU (Network Gateway ECU)

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 (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3A and 3C instrument panel junction block assembly connectors.

    2. A004J2PE05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3A-27 - Body ground Always 11 to 14 V
      3C-19 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)


    1. Disconnect the 3B instrument panel junction block assembly connector.

    2. Disconnect the A73 and D6 main body ECU (network gateway ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-18 - Body ground Always Below 1 Ω
      A73-4 (GND )- Body ground Always Below 1 Ω
      D6-1 (GND - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly Click here.

    2. Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.

      A004K9IE02
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-27 - MB-1 (BECU) Always Below 1 Ω
      3C-19 - MB-32 (BMPX) Always Below 1 Ω
      3B-18 - MB-11 (GND Always Below 1 Ω

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here