Theft Deterrent System (For Hatchback) Horn Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT HORN

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

THEFT DETERRENT SYSTEM (for Hatchback) - Horn Circuit


DESCRIPTION

When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU transmits a signal to cause the horn to sound at intervals of 0.4 seconds.

WIRING DIAGRAM


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


INSPECTION PROCEDURE

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

  1. Press the horn switch and check if the horns sound.

    Result
    Result
    		Proceed to
    Horn sound
    		A
    Horn do not sound
    		B


B
GO TO HORN SYSTEM (YARIS_NCP93 RM000000P4J017X.html)
A


2.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


  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) Horn Circuit


    Text in Illustration
    *a
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)
    		-
    		-

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3C-19 - MB-28 (HORN)
    		Always
    		Below 1 Ω


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

REPLACE MAIN BODY ECU (YARIS_NCP93 RM000003TOE00CX.html)