THEFT DETERRENT SYSTEM ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

A003WCFE01

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Disconnect the 2E*1, 2F*2, 2B and 2C instrument panel junction block assembly and MB main body ECU (multiplex network body ECU) connectors.

      A003YJDE08

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-6 - MB-11 (GND1) Always Below 1 Ω
      2B-6 - Body ground Always 10 kΩ or higher
      2C-18 - MB-30 (BECU) Always Below 1 Ω
      2C-18 - Body ground Always 10 kΩ or higher

      2E-1*1 - MB-31 (ALTB)

      2F-1*2 - MB-31 (ALTB)

      		 Always Below 1 Ω

      2E-1*1 - Body ground

      2F-1*2 - Body ground

      		 Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD

      Text in Illustration
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - AUXILIARY BATTERY)


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

      Standard Voltage
      Tester Connection Condition Specified Condition

      2E-1*1 - Body ground

      2F-1*2 - Body ground

      		 Power switch off 11 to 14 V
      2C-18 - Body ground Power switch off 11 to 14 V

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-6 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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