Idle Speed Control Actuator (ISA): Notes

The idle speed control actuator is the double coil type and has two coils. The two coils are driven by separate driver stages in the ECU. Depending on the pulse duty factor, the equilibrium of the magnetic forces of the two coils will result in different angles of the motor. A bypass hose line is arranged in parallel to the throttle valve, where the idle speed actuator is inserted.