Subaru Legacy III (2000-2003 year). Manual - part 934

COM-2

COMMUNICATION SYSTEM

GENERAL DESCRIPTION

1. General Description

A: PREPARATION TOOL

1. GENERAL TOOLS

TOOL NAME

REMARKS

Circuit Tester

Used for measuring resistance and voltage.

COM-3

COMMUNICATION SYSTEM

HORN SYSTEM

2. Horn System

A: SCHEMATIC

1. HORN

<Ref. to WI-235, SCHEMATIC, Horn System.>

B: INSPECTION

1. HORN RELAY

Measure horn relay resistance between terminals
(indicated in table below) while connecting terminal
No. 4 to battery positive terminal and terminal No. 3
to battery ground terminal.

Current

Terminal No.

Standard

Flow

1 and 2

Less than 1 

Ω

No flow

More than 1 M

Ω

COM00001

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

COM-4

COMMUNICATION SYSTEM

HORN

3. Horn

A: REMOVAL

1) Disconnect ground cable from battery.
2) Remove horn bracket mounting bolt (A).
3) Disconnect harness connector and remove horn
assembly (B).

B: INSTALLATION

Install in the reverse order of removal.

C: INSPECTION 

With 12 V direct current supply between horn termi-
nal and case ground, check that the horn sounds
properly.

COM00007

( A )

( B )

( B )

COM00008

COM-5

COMMUNICATION SYSTEM

HORN SWITCH

4. Horn Switch

A: REMOVAL

WARNING:
Before servicing, be sure to read the notes in
the AB section for proper handling of the driver
airbag module.  <Ref. to AB-3, CAUTION, Gen-
eral Description.>

1) Disconnect ground cable from battery.
2) Remove the driver's airbag module.  <Ref. to
AB-12, Driver's Airbag Module.>
3) Remove horn switch from steering wheel as
shown.

B: INSTALLATION

Install in the reverse order of removal.

C: INSPECTION

Measure horn switch resistance.

Switch position

Terminal No.

Standard

When horn switch is 
pushed.

1 and Body 

ground

Less than 1 

Ω

When horn switch is not 
pushed.

More than 1 M

Ω

COM00004

COM00005

1

2

4

5