General Description - Subaru LEGACY 2004 Service Manual

3. General Description

A: CAUTION
1. SRS AIRBAG SYSTEM
Airbag system wiring harness is routed near the
body integrated unit and twisted pair line.
CAUTION:
• All airbag system wiring harness and con-
nectors are colored yellow. Do not use the elec-
trical test equipment on these circuits.
• Be careful not to damage the Airbag system
wiring harness when servicing the body inte-
grated unit and LAN system.
2. LAN SYSTEM
• Bus line of LAN system is twisted pair line. Be
careful not to bypass or partly unbind the twisted
pair line.
• Do not make clearance between bus lines (CAN
High, CAN Low).
• Difference of bus line length should be within 10
cm (3.94 in).
• Fray near the connector should be within 8 cm
(3.94 in).
(A) Bypass wire connection
• If the characteristics of the twisted pair line is
changed, it may cause extremely weakness to the
noise.
General Description
(A)
LAN00081
LAN(diag)-5
LAN SYSTEM (DIAGNOSTICS)
• When repairing the harness, connect the wires
using soldering and protect it with insulating tape,
etc.
(A) Soldering and protection with insulating tape
B: INSPECTION
Before performing diagnostics, check the following
items which might affect body integrated unit mal-
functions.
1) Measure the battery voltage and check electro-
lyte.
Standard voltage: 12 V, or more
Specific gravity: Above 1.260
2) Check the fuse condition.
Make sure that ampere of the fuse is setting value,
and it is not blown out.
3) Check the connecting condition of harness and
harness connector.
4) Confirm settings of body integrated unit are cor-
responded to vehicle equipment. <Ref. to LAN(di-
ag)-18, REGISTRATION BODY INTEGRATED
UNIT (EQUIPMENT SETTING), OPERATION,
Subaru Select Monitor.>
5) Confirm setting are corresponded to vehicle
equipment by function setting (ECM customizing)
of body integrated unit. <Ref. to LAN(diag)-20,
FREEZE FRAME DATA, OPERATION, Subaru
Select Monitor.>
6) Confirm "Factory initial setting" of body integrat-
ed unit registrations is "Market".
7) Confirm key illumination does not blink with igni-
tion switch turned to ON.
(A)
LAN00080