Toyota Yaris: Horn / Horn System

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Exterior / Horn / Horn System

Parts Location

PARTS LOCATION

ILLUSTRATION

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LOW PITCHED HORN ASSEMBLY

NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY

- HORN RELAY

- HORN FUSE

ILLUSTRATION

*1	HORN BUTTON ASSEMBLY	*2	SPIRAL CABLE SUB-ASSEMBLY
*3	MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)	*4	POWER DISTRIBUTION BOX ASSEMBLY
*5	DLC3	-	-

System Diagram

SYSTEM DIAGRAM

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.

Click here

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Horn System

Symptom	Suspected Area	Link
Horn does not sound	HORN fuse	-
	HORN relay
	Horn button assembly	-
	Spiral cable sub-assembly
	Power distribution box assembly
	Harness or connector	-
Horn sounds all the time	HORN relay
	Horn button assembly	-
	Spiral cable sub-assembly
	Power distribution box assembly
	Main body ECU (Multiplex network body ECU)
	Harness or connector	-

Data List / Active Test

DATA LIST / ACTIVE TEST

ACTIVE TEST

HINT:

Using the GTS to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Vehicle Horn	Vehicle horn	OFF or ON	-

Horn

ComponentsCOMPONENTS ILLUSTRATION *1 LOW PITCHED HORN ASSEMBLY *2 RADIATOR UPPER AIR GUIDE PLATE N*m (kgf*cm, ft.*lbf): Specified torque - - RemovalREMOVAL PROCEDURE 1...

Relay

On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT HORN RELAY ASSEMBLY (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below...

Other information:

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