Suzuki GA413 Service Manual page 451

STEP
4 Does none of 4 injectors make operation sound at
Step 2?
5 Fuel injector circuit check:
1) With ignition switch OFF position, disconnect
ECM connectors.
2) Check "B/R", "Br/B", "Br", "Br/W", "Br/Y" wire for
open and short.
Are all wires in good condition?
Fig. for Step 3
ACTION
ENGINE AND EMISSION CONTROL SYSTEM 6E-41
YES
Go to Step 5.
Poor connection of con-
nector.
If OK, substitute a
known-good ECM and
recheck.
NO
Faulty wire harness.
Faulty injector.
Poor connection of con-
nector.
If OK, substitute a
known-good ECM and
recheck.
Faulty wire harness.