Suzuki RA410, Manual

Page: 416 / 761

1) Disconnect scan tool from DLC if connected.
2) Warm up engine to normal operating temperature.
3) Stop engine and connect duty meter (3) between duty output
terminal (5) and ground terminal (6) of monitor connector (1).
4) Using service wire (2), ground diagnosis switch terminal (4) in
monitor connector .
5) Set tachometer.
6) Start engine and warm it up completely.
7) Check IAC duty and idle speed. If duty and / or idle speed are out
of specifications, check idle air control system referring to Diag-
nostic Flow Table B-4 IDLE AIR CONTROL SYSTEM CHECK
in this section.
3
2
6
4
1
5
NOTE:
IAC duty can be checked roughly by using voltmeter. IAC duty
to voltage relation is as follows.
•
“OFF DUTY METER” is such duty meter that indicates
approx. 100% when terminal voltage is approx. “0V”.
•
“V
B
” represents battery voltage obtained while engine (of
vehicle being checked) is running.
8) Remove service wire from monitor connector.
9) Check that specified engine idle speed is obtained with A/ C ON
if vehicle is equipped with A / C.
If not, check A / C ON signal circuit and idle air control system.
ENGINE AND EMISSION CONTROL SYSTEM 6E1-51
A/C OFF ON
Engine speed [r / min] 800 ± 50 950 ± 50
IAC Duty [%] 5 ~ 25 –
ON DUTY
METER INDICATION
(%)
OFF DUTY
METER INDICATION
(%)
VOLTMETER
INDICATION
(V)
0
50
100
100
50
0
0
0.5 × V
B
V
B