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Home >> Ford >> 2006 >> Focus ZX4 S, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Description & Operation (Except Diesel & Hybrid) >> Dual-Injection Fuel Delivery System >> Fuel Select Switch (FSSW) Circuit
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Fuel Select Switch (FSSW) Circuit

The FSSW circuit is used by the PCM to toggle between single-injection and dual-injection fuel modes. When torque demand reaches a calibrated limit the PCM requests the secondary injectors by toggling the FSSW circuit.

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