Suzuki WagonR+ RB310, Service Manual

Page: 2468 / 3086

ENGINE DIAGNOSIS 6-109
Fig. 1 for Step 8 Fig. 2 for Step 8
SUZUKI
SCAN TOOL
DISPLAY
VOLTAGE
AT E92-15
“ P ” and “ N ”
range
“ R ” , “ D ” , “ 2 ”
and “ L ” range
P/N range
D range
10 – 14V
0 – 1V
Scan tool or
voltmeter
Slector
lever position
E22-14
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
performance.
If sensors are OK,
substitute a known-
good ECM.
8 Check PNP signal ( “ D ” range signal).
When using SUZUKI scan tool:
1) Connect SUZUKI scan tool to DLC with ignition
switch OFF. See Fig. 1.
2) Turn ignition switch ON and check PNP signal
( “ P/N ” and “ D ” range) on display when shifting
selector lever to each range.
When not using SUZUKI scan tool:
1) Turn ignition switch ON.
2) Check voltage at terminal E22-14 of ECM
connector connected. See Fig. 1.
Is “ D ” range on display (Is 0 – 1 V indicated) no matter
which of “ R ” , “ D ” , “ 2 ” and “ L ” range positions selector
lever may be at?
Is
“ P/N ” range on display (Is 10 – 14 V indicated)
when selector lever is at one of “ R ” , “ D ” , “ 2 ” and “ L ”
range position only? See Fig. 2.
Go to Step 9. Repair or replace.
9 Check IAC system referring to Step 2 of DTC P0505
Diag. Flow Table.
Is check result satisfactory? Go to Step 10. Go to Step 3 of DTC
P0505 Diag. Flow
Table.
10 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.