HORN

GENERAL INFORMATION 42-3 ON-VEHICLE SERVICE 42-8

Description 42-3 Horn 42-8
Specification 42-4 Removal 42-8
Tool 42-4 Inspection 42-8
Circuit Diagram 42-5 Installation 42-9

DIAGNOSIS & TESTING 42-6

Problem Symptoms Table 42-6
Horn Fuse Inspection 42-6
Horn Relay Inspection 42-7

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GENERAL INFORMATION
HORN

Description

RM16420010
42
1 - Horn Switch 2 - Engine Compartment Fuse and Relay Box
3 - High Pitched Horn 4 - Low Pitched Horn

This vehicle is equipped with high pitched and low pitched electronic horn system.
Horn system consists of the following components:
 Horn: both high pitched horn and low pitched horn are installed on body frame side rail.
 Horn switch: horn switch is installed on steering wheel.
 Horn fuse: horn fuse is located in engine compartment fuse and relay box.
 Horn relay: horn relay is located in engine compartment fuse and relay box.

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Specification
Torque Specification

Description Torque (N·m)

Horn Bracket Fixing Nut 15 ± 2

Tool
General Tool

Digital Multimeter

RCH0000002

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Circuit Diagram
Horn System

BATTERY

1 5
HORN ENGINE
RELAY COMPARTMENT
FUSE AND
2 3 RELAY BOX (C/F)
Q-018
EF27 B-022
15A

F12 C3
GrR

GrR

B-045
20 I-015
R

R
GrR

GrR

14 2 2
SPIRAL
CABLE LOW HIGH
I-004 PITCHED PITCHED
HORN HORN
Q-006 Q-012
BW

1 1
2-11
Br

Br
BCM (2)
B-048
PRESSED HORN
SWITCH Q-003 Q-015
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RELEASED

C1 C2 C3 C4 C5

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
C6 C7 C8 C9 C10 16 15 14 13 12 11 10 9

Q-018 I-004
L B-048 W
L

1 2 3 4 5 6 7 8 9 10 11 12 13
2 1 2 1
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 14 15 16 17 18 19 20 21 22 23 24 25 26

F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24
Q-006 Q-012
B-045 Gr Gr
B

B-022
W EM16420010

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DIAGNOSIS & TESTING

Problem Symptoms Table
HINT:
Use symptoms table below to help determine cause of problem. Check each suspected area in sequence.
Repair or adjust faulty components, or replace as necessary.

Symptom Suspected Area See page

Horn fuse (blown) 53-37
Low pitched horn (damaged) 42-8
High pitched horn (damaged) 42-8
Horn does not sound
Horn switch (damaged) 32-85
Spiral cable (damaged) 32-87
Wire harness (short or open) -

Horn Fuse Inspection

1. Identify the horn fuse on engine compartment fuse and
relay box.

15A

42
RM16420020

2. Check the horn fuse.

a. Using a fuse puller, remove the horn fuse (15 A).
b. Check if fuse is blown. Replace the fuse if it is blown.

CAUTION

 Use a fuse with the same specification as original fuse to avoid affecting the normal usage of electrical
equipment.

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Horn Relay Inspection

1. Check the horn relay.
a. Remove the horn relay from engine compartment fuse and relay box.
b. Check the horn relay.
+ -

Multimeter Specified
Condition
Connection Condition 3

When battery 5

voltage is not 2 4 1

Terminal 3 -
applied between No continuity
Terminal 5
terminal 2 and
terminal 1
When battery RM16420021

Terminal 3 - voltage is applied

Continuity
Terminal 5 between terminal
2 and terminal 1

If result is not as specified, replace the relay.

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ON-VEHICLE SERVICE
Horn
Removal
1. Turn off all electrical equipment and the ignition switch.
2. Disconnect the negative battery cable.
3. Remove the front bumper assembly (See page 49-8).
4. Remove the high pitched horn.
a. Disconnect the high pitched horn wire harness
connector (1).
b. Remove the fixing nut (arrow) from high pitched horn
bracket, and remove the high pitched horn.
(Tightening torque: 15 ± 2 N·m)
1

RM16420030

5. Remove the low pitched horn.

a. Disconnect the low pitched horn wire harness
connector (1) and wire harness fixing clip (2). 1
b. Remove the fixing nut (arrow) from low pitched horn
bracket, and remove the low pitched horn.
(Tightening torque: 15 ± 2 N·m)

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RM16420040

Inspection
1. Check the high pitched horn.
+ -
Apply battery voltage to high pitched horn and check the
operation of high pitched horn.
2 1
Measurement Specified
Condition
Condition Condition
Battery positive
(+) - Terminal 1
Always Sounds
Battery negative
(-) - Terminal 2 RM16420050

If result is not as specified, replace the high pitched horn.

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2. Check the low pitched horn.

+ -
Apply battery voltage to low pitched horn and check the
operation of low pitched horn.
2 1
Measurement Specified
Condition
Condition Condition
Battery positive
(+) - Terminal 1
Always Sounds
Battery negative
(-) - Terminal 2 RM16420060

If result is not as specified, replace the low pitched horn.

3. Check the wire harness.
Using a digital multimeter, check horn system wire harness for an open, short or ground failure. Replace
the wire harness if necessary.

Installation
Installation is in the reverse order of removal.

CAUTION

 Tighten fixing bolts to the specified torque.

 Install each connector in place.

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