Theft Deterrent System (For Hatchback) Ecu Power Source Circuit

Vehicle Interior. Yaris. Ncp93, 131
Theft Deterrent Keyless Entry. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY, BODY GROUND)

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE, BODY GROUND)

THEFT DETERRENT SYSTEM (for Hatchback) - ECU Power Source Circuit


DESCRIPTION

This circuit provides power for main body ECU operation.

WIRING DIAGRAM


Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Theft Deterrent System (For Hatchback) Ecu Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY, BODY GROUND)


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Theft Deterrent System (For Hatchback) Ecu Power Source Circuit

  1. Disconnect the 3C, 3E and 3B instrument panel junction block assembly connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3B-8 - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    3C-21 - Body ground
    		Always
    		11 to 14 V
    3E-1 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Instrument Panel Junction Block Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE, BODY GROUND)

  1. Reconnect the 3B, 3C, and 3E instrument panel junction block assembly connectors.

  1. Remove the main body ECU (YARIS_NCP93 RM000003TOE00CX.html).


Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Theft Deterrent System (For Hatchback) Ecu Power Source Circuit


Text in Illustration
*a
instrument panel junction block assembly
-
-

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    MB-30 (BECU) - Body ground
    		Always
    		11 to 14 V
    MB-31 (ALTB) - Body ground
    		Always
    		11 to 14 V
    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    MB-11 (GND1) - Body ground
    		Always
    		Below 1 Ω


NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (YARIS_NCP93 RM000003TOE00CX.html)
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (YARIS_NCP93 RM00000368901IX.html)