Suzuki WagonR+ RB310, Service Manual

Page: 1980 / 3086

ENGINE AND EMISSION CONTROL SYSTEM 6E1-27
1) Connect scan tool to DLC with ignition switch OFF, if it is avail-
able.
2) Warm up engine to normal operating temperature.
3) Select
“ Data List ” mode on scan tool to check “ IAC duty ” .
4) Apply load to engine as described below and check that idle
speed is kept at specified level and “ IAC duty ” increases as spe-
cified below. At the same time, check that plunger of ISC actua-
tor moves.
Increase of ISC duty
when headlight turns ON : About 3.5%
when A/C is operating
: About 10%
5) Stop engine and leave it as it is till it cools off. Then check that
plunger of ISC actuator moves when ignition switch is turned
from OFF to ON once.
If abnormality is found in Steps 4) and 5), check ISC relay, ISC
actuator, ISC electric circuit and closed throttle position switch
signal.
If abnormality is found in Step 4) only, check A/C signal circuit
first.
ISC ACTUATOR
NOTE:
As ISC actuator has been preadjusted precisely at factory, it must
not be taken out of throttle body or disassembled.
INSPECTION
1) Disconnect connector from ISC actuator.
2) Check whether ISC actuator coil is open or short.
ISC actuator resistance at 20
"
C (68
"
F): 3 – 50 Ω
NOTE:
Above data should be used as reference value for determin-
ing whether coil is open or short only. ISC actuator resis-
tance may be out of above specified range even when ISC
actuator is normal.