Toyota Yaris: Horn / Relay

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Exterior / Horn / Relay

On-vehicle Inspection

ON-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.

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 - 5	Auxiliary battery voltage not applied between terminals 1 and 2	10 kΩ or higher
3 - 5	Auxiliary battery voltage applied between terminals 1 and 2	Below 1 Ω

If the result is not as specified, replace the horn relay assembly.

Horn System

Parts LocationPARTS LOCATION ILLUSTRATION *1 LOW PITCHED HORN ASSEMBLY *2 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 DiagramSYSTEM DIAGRAM Problem Symptoms TablePROBLEM SYMPTOMS TABLE NOTICE: If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration...

Lighting (ext)

Other information:

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Supply Voltage Circuit Circuit Voltage Above Threshold (C123A17)

DESCRIPTION The power steering ECU assembly distinguishes the ignition switch status as ON or off through the IG power source circuit. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note C123A17 Supply Voltage Circuit Circuit Voltage Above Threshold IG voltage is 18...

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Vehicle Control History

VEHICLE CONTROL HISTORY NOTICE: Repairing or replacing related parts may cause Vehicle Control History (RoB) codes to be stored. Make sure to record any output Vehicle Control History codes before clearing them and checking the Vehicle Control History again...