Sym RV 250i - Page 61

4. Fuel Injection System
4-12
Idle Speed Control Valve (ISC stepper motor)
Function
ECU controls ISC stepper motor to adjust the bypass intake air quantity and stablize the idle speed.
ISC
ECU
Battery
+Va
-Va
+Vb
-Vb
Step
S
N
S
S
N
N
Va
Vb
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