Suzuki RA410, Manual

Page: 403 / 761

6E1-38 ENGINE AND EMISSION CONTROL SYSTEM
TABLE B-4 IAC SYSTEM CHECK
V/W
P/G
B
B
B/Br
1. IAC valve
2. Intake air
3. Bypass air
4. To combustion chambers
5. Throttle body
6. To main relay
7. ECM/PCM
8. Monitor connector
9. Sensed information
TERMINAL ARRANGEMENT OF ECM/PCM CONNECTOR (VIEWED FROM HARNESS SIDE)
2
3
1
4
5
9
8
7
6
C11
A12
C1
B1
C22
B
R/Bl
R/W
R/B
R/Y
B/R
C22
C1 A1
A12
B6
B15
C11 B1
B14 B13
B6
B15
B14
B13
A1
STEP ACTION YES NO
1 1) Check DTC, referring to DTC in this section.
2) Was DTC No. 12 displayed when diagnosis switch
terminal is grounded?
Go to step 2. Go back to Flow Table
corresponding to that
DTC.
2 1) Warm up engine to normal operating temperature
and keep it idling.
2) Using service wire (1), ground Diag. switch terminal
(2) in monitor connector (3) and connect duty meter
(4) between Duty output (“F”) terminal (5) and
Ground (“D”) terminal (6) of monitor connector.
Check IAC duty (value indicated on duty meter) and
engine idle speed.
3) Are they within specification?
IAC duty : 5 – 25 %
Engine idle speed: 750 – 850 rpm
Go to step 3. Disconnect negative
cable at battery, Recon-
nect it and recheck.
If OK, go to step 4.