Subaru Legacy (2005 year). Service manual — part 1051

LAN(diag)-83

LAN SYSTEM (DIAGNOSTICS)

General Diagnostic Table

13.General Diagnostic Table

A: INSPECTION

Read the DTC or inspect and diagnose the following data in the current data display using Subaru Select
Monitor.

1. LAN SYSTEM

Item

Operation

Criterion

NOTE

YES

Diagnostic code

DTC is not displayed when inspect-
ing all DTCs.

DTC is not dis-

played.

Perform the diag-
nosis according to
DTC.

—

Engine coolant
temperature

Check the current data display of
ECM, TCM and body integrated
module. Three data value are the
same.

Same values

Inspect LAN sys-
tem.

If engine coolant tempera-
ture sensor is not OK,
inspect the sensor circuit.

R defogger SW

It turns to ON when pressing
switch. (Low-speed CAN is OK)

Turns to ON.

Inspect rear defog-
ger switch.

Rear defogger switch is
connected with Low-
speed CAN.

R defogger output

When switch input, it is output.

Output

Replace the body
integrated module.

If not operate with output,
check the rear defogger
relay.

Door lock SW

When locked with door lock switch,
it turns to ON.

Turns to ON.

Inspect door lock
switch.

Door lock switch is con-
nected with Low-speed
CAN.

Door lock actuator

When locked with door lock switch,
it is output.

Output

Replace the body
integrated module.

—

LAN(diag)-84

LAN SYSTEM (DIAGNOSTICS)

General Diagnostic Table

2. BODY INTEGRATED MODULE

Item

Operation

Criterion

NOTE

YES

Illumination VR
power supply

Operate the illumination volume,
illumination light is controlled
according to the change of voltage
on data display.

Illumination light is

controlled with

changing of data.

Inspect the illumi-
nation volume.

—

Fuel level resis-
tance

Check the fuel level resistance and
fuel level resistance 2. Both resis-
tances are same.

Same values

Inspect the body
integrated module.

Compare the input and
output values of body inte-
grated module.

R fog light input

When turned rear fog light switch to
ON, data display turns to ON.

Turns to ON.

Inspect the rear fog
light switch.

—

R fog light output

When turned rear fog light switch to
ON, output turns to ON.

Turns to ON.

Inspect the body
integrated module.

If not operate with output
turned to ON, check the
rear fog light relay.

R wiper SW input

When rear wiper SW to ON, data
display turns to ON.

Turns to ON.

Inspect the rear
wiper switch.

—

R wiper output

When rear wiper switch to ON, out-
put signal turns to ON.

Turns to ON.

Replace the body
integrated module.

If not operate with output
turned to ON, check the
rear wiper motor.

Keyless Entry

Keyless entry LOCK/UNLOCK the
doors.

Operate

Inspect the key-
less antenna.

If the antenna is OK,
replace the body inte-
grated module.

Brake SW

When brake pedal is depressed, it
turns to ON.

Turns to ON.

Inspect the brake
switch.

—

Shift lock solenoid

The shift lock releases when
depressing the brake pedal.

Released

Inspect the shift
lock.

—

Body integrated
module registra-
tion function setting

Does Vehicle equipment corre-
spond to setting values?

Correspondence

Reconfigure the
values according to
vehicle equipment.

—

Customize

When changing customize setting,
the registration completes correctly.

Registered

Inspect the body
integrated module.

—

Manual mode

Switch the shift (UP/DOWN) on
Manual mode. Indicator is changed
in 1 — 2.

Change

Inspect the shift
lever.

—

Function check

Each checking item operate cor-
rectly. (Except for not equipped)

Operate

Inspect for non-
functional actuator.

—

Security

After locking with keyless entry sys-
tem and open the door, the security
system operates and the horn
sounds.

Horn sounds.

(Security system

operates.)

Inspect the secu-
rity system.

—

FUJI HEAVY INDUSTRIES LTD.

G2360GE8

2005 LEGACY SERVICE MANUAL

QUICK REFERENCE INDEX

WIRING SYSTEM SECTION

This manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.

All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.

WIRING SYSTEM