Subaru Legacy (2005 year). 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

NO

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

NO

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 service 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

WI