Suzuki GA413, Service Manual

Page: 873 / 1246

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-97
GA413
supple
STEP ACTION YES NO
6 Check IAC system referring to Step 2 of DTC P0505
Diag. Flow Table.
Is check result satisfactory? Go to Step 7. Go to Step 3 of DTC
P0505 Diag. Flow
Table.
7 Was IAC duty less than about 3% (or more than about
97% for OFF duty meter) in Step 1 of this table? Check abnormal air
inhaling from air intake
system, PCV valve
and EVAP canister
purge control system. Check TP sensor
(closed throttle
position) and ECT
sensor for perfor-
mance.
If sensors are OK,
substitute a known-
good ECM.
8 Check IAC system referring to Step 2 of DTC P0505
Diag. Flow Table.
Is check result satisfactory? Go to Step 9. Go to Step 3 of DTC
P0505 Diag. Flow
Table.
9 Was IAC duty more than about 30% or 40% (or less
than 70% or 60% for OFF duty meter) in Step 1 of
this table?
NOTE:
Duty value with (
) are applicable to vehicle used
at high altitude (higher than 2000 m or 6560 ft).
Check parts or system
which can cause
engine low idle.
– Accessory engine
load
– Clog of air passage
– Etc.
Substitute a known-
good ECM and
recheck.