THEFT DETERRENT SYSTEM > ECU Power Source Circuit

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DESCRIPTION

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

WIRING DIAGRAM


B272453E01


INSPECTION PROCEDURE

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


    B220556E08

  1. 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. *1: for LHD
    2. *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. *1: for LHD
    2. *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)