Suzuki DF150 Service Manual page 121

3-62 ENGINE CONTROL SYSTEM
IAC VALVE
1. Disconnect connector from IAC valve.
2. Check each coil of IAC valve for resistance.
Terminals
Between "1" and "2"
"3" and "2"
"4" and "5"
"6" and "5"
If out of specification, replace IAC valve.
3. Remove IAC valve from intake manifold. (See page 3-69.)
4. Connect connector to IAC valve.
5. When the ignition switch is turned ON and OFF, check that
the rotary valve turns to open and returns to closed.
6. If the valve does not turn, check the wiring harness for conti-
nuity (between ECM and IAC valve) and connector contact
condition.
OCV (Oil control valve)
1. Remove OCV. (See page 3-71.)
2. Check for operating sound (ticking sound) when battery volt-
age applied to and removed from the terminals of oil control
valve.
3. Check resistance between the two OCV terminals.
OCV resistance: 6.0 – 8.0 Ω
Resistance
25 – 34 Ω
1 2
3
4
5
6