Suzuki Wagon R Manual page 442

TABLE B-1 FUEL INJECTOR CIRCUIT CHECK
Fuse box
Ignition
switch
Relay box
Main
fuse
E21-31
INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check Injector for Operating Sound.
Using sound scope, check each injector for operating
sound at engine cranking.
Do all 4 injectors make operating sound?
3 Dose none of 4 injectors make operating sound at
Step 2?
4 Check power circuit of injectors for open and short.
Is it normal?
Main relay
No.1 injector
No.2 injector
No.3 injector
No.4 injector
E21-9
E21-8
E21-21
ACTION YES
Go to Step 2.
Fuel injector circuit is
in good condition.
Go to Step 4.
Check all 4 injectors
for resistance
respectively.
If resistance is OK,
substitute a known-
good ECM and
recheck.
ENGINE DIAGNOSIS 6-103
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Go to Step 3.
Check coupler
connection and wire
harness of injector
not making o erating not making operating
sound and injector
itself (Refer to Section
6E).
Power circuit open or
short.