Suzuki Swift Sport 2004 Service & Repair Manual page 1433

Step
6 Combination meter operation check
1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Turn ignition switch to ON position.
3) Check combination meter operation for seat belt
reminder light (fastening and unfastening driver side
seat belt).
Are they OK?
7 Key indicator light operation check
1) Turn ignition switch to OFF position.
2) Push ignition knob switch of steering lock unit.
Does key indicator light turn ON?
8 DTC check of BCM
1) Disconnect connector of any one of control module other
than BCM.
2) Recheck BCM for DTC.
Is DTC U1144 (No.1144) detected?
Action
Body Electrical Control System:
Yes
Go to Step 7.
Go to Step 8.
Disconnect connectors
of control modules other
than the one whose
connector is
disconnected in Step 1)
one by one and check
that DTC U1144 is
detected by BCM each
time connector is
disconnected. When
DTC U1144 is not
detected by BCM while
checking in this way, go
to description under
"NO" below. If DTC
U1144 is detected by
BCM even when
connectors of all control
modules that use CAN
communication with
BCM are disconnected,
substitute a known-
good BCM and recheck.
10B-30
No
Check combination
meter power and
ground circuit. If circuit
is OK, substitute a
known-good
combination meter and
recheck.
Check keyless start
control module power
and ground circuit. If
circuit is OK, substitute
a known-good keyless
start control module and
recheck.
Check power and
ground circuit of control
module disconnected in
Step 1). If circuit is OK,
substitute a known-
good control module
disconnected in Step 1)
and recheck.