HORN – HORN SYSTEM

HO–1

HORN SYSTEM
BODY ELECTRICAL
HORN

PARTS LOCATION

STEERING PAD SWITCH

HO

LOW PITCHED HORN

HIGH PITCHED HORN

ENGINE ROOM JUNCTION BLOCK, RELAY BLOCK
- INTEGRATION RELAY (UNIT B: HORN RELAY)
- HORN FUSE
- BATT P/I H-FUSE

B127759E01

HO–2

HORN – HORN SYSTEM

SYSTEM DIAGRAM

HORN

BATT P/I

Integration Relay (Unit B)
HORN

MAIN

HO
Steering Pad
Switch

Low
Pitched
Horn

High
Pitched
Horn

B136931E01

HO–3

HORN – HORN SYSTEM

PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of the
problem symptom. 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

Horn does not sound

Suspected area

See page

1. HORN fuse

HO-1

2. HORN relay

HO-4

3. High pitched horn

HO-8

4. Low pitched horn

HO-6

5. Steering pad switch

-

6. Spiral cable

-

HO

HO–4

HORN – INTEGRATION RELAY

INTEGRATION RELAY
ON-VEHICLE INSPECTION
1.

DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.

2.

INSPECT FUSE (HORN)
(a) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ω
If the result is not as specified, replace the fuse.

3.

INSPECT INTEGRATION RELAY (HORN RELAY)
(a) Using a screwdriver, detach the 2 claws and
disconnect the integration relay from the engine
room No. 1 junction block.
HINT:
Tape the screwdriver tip before use.
(b) Disconnect the 3 connectors from the integration
relay.
(c) Measure the resistance of the HORN relay.
Standard voltage

HO

Tester Connection

3K

3J

1

8 765 4 321

Specified Condition

3J-8 - 3K-1

10 kΩ or higher

3J-8 - 3K-1

Below 1 Ω (when battery voltage is
applied to terminals 3J-7 and 3K-1)

If the result is not as specified, replace the
integration relay.
(d) Connect the 3 connectors to the integration relay.
(e) Install the integration relay to the engine room No. 1
junction block.

3K

3J

1

8
7

B136930E01

4.

CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL

5.

PERFORM INITIALIZATION
(a) Perform initialization ( IN-32).
CAUTION:
Certain system need to be initialized after
disconnecting and reconnecting the cable from
the negative (-) battery terminal.

HO–5

HORN – LOW PITCHED HORN

LOW PITCHED HORN
BODY ELECTRICAL
HORN

COMPONENTS

20 (204, 15)

LOW PITCHED HORN

HO
FRONT BUMPER COVER

N*m (kgf*cm, ft.*lbf) : Specified torque
B127784E01

HO–6

HORN – LOW PITCHED HORN

REMOVAL
1.

REMOVE FRONT BUMPER COVER (See page ET-4)

2.

REMOVE LOW PITCHED HORN
(a) Disconnect the horn connector.
(b) Remove the bolt and horn.

B127786E01

INSPECTION
1.

INSPECT LOW PITCHED HORN
(a) Apply battery voltage to the horn and check the
operation of the horn.
OK

Measurement Condition

Specified Condition

Battery positive (+) → Terminal 1

Horn sounds

Battery negative (-) → Horn bracket
B072268E02

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

INSTALLATION
1.

INSTALL LOW PITCHED HORN
(a) Place the stay onto the baffle part of the radiator
support upper, and then install the horn with the
bolt.
Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf)
NOTICE:
Do not overlap the horn and the protruding part
of the radiator support.
(b) Connect the horn connector.

2.

INSTALL FRONT BUMPER COVER (See page ET-6)

HO

B127786E01

HORN – HIGH PITCHED HORN

HO–7

HIGH PITCHED HORN
BODY ELECTRICAL
HORN

COMPONENTS

HIGH PITCHED HORN

HO

20 (204, 15)

FRONT BUMPER COVER

N*m (kgf*cm, ft.*lbf) : Specified torque
B127785E01

HO–8

HORN – HIGH PITCHED HORN

REMOVAL
1.

REMOVE FRONT BUMPER COVER (See page ET-4)

2.

REMOVE HIGH PITCHED HORN
(a) Disconnect the horn connector.
(b) Remove the bolt and horn.

B127787E01

INSPECTION
1.

INSPECT HIGH PITCHED HORN
(a) Apply battery voltage to the horn and check the
operation of the horn.
OK

Measurement Condition

Specified Condition

Battery positive (+) → Terminal 1

Horn sounds

Battery negative (-) → Horn bracket
B072265E05

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

INSTALLATION
1.

INSTALL HIGH PITCHED HORN
(a) Place the stay onto the baffle part of the radiator
support upper, and then install the horn with the
bolt.
Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf)
NOTICE:
Do not overlap the horn and the protruding part
of the radiator support.
(b) Connect the horn connector.

2.

INSTALL FRONT BUMPER COVER (See page ET-6)

HO

B127787E01