[Not Using Suzuki Scan Tool] (Vehicle With Monitor Connector) - Suzuki GRAND VITARA XL-7 Owner's Manual

6E2-16 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
[Not using SUZUKI scan tool] (vehicle with monitor
connector)
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 and ground terminal of monitor connector (1).
4) Using service wire (2), ground diagnosis switch terminal in
monitor connector.
5) Set tachometer.
6) Start engine and warm it up completely.
7) Check IAC duty and idle air control system referring to Diag-
nostic Flow Table B-4 "IDLE AIR CONTROL SYSTEM
CHECK" in this section.
A: Output duty select switch terminal
B: Diagnosis switch terminal
C: Blank
D: Ground terminal
E: Test switch terminal
F: Duty output terminal
Engine idle speed:
IAC duty at specified
idle speed:
NOTE:
IAC duty can be checked roughly by using voltmeter. I
AC duty to voltage relation is as follows.
ON DUTY METER
INDICATION
(%)
0
50
100
• "OFF DUTY METER" is such duty meter that indicates
approx. 100% when terminal voltage is approx. "0 V".
• "V " represents battery voltage while engine of vehicle being
B
checked is running.
8) Remove service wire from monitor connector.
9) Install cap to monitor connector.
10) 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 sys-
tem.
A/C OFF
700 ± 50 r/min.
5 – 40 % (0.7 – 5.6 V
when battery voltage
is 14 V)
OFF DUTY VOLT METER
INDICATION INDICATION
(%)
10
50
0
A/C ON
750 ± 50 r/min.
–
(V)
0
0.5 x V
B
V
B