Conditions for Setting the DTC
WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
DTC C0017 can only be set with the key in the ON position, the pump motor is OFF, and the EBCM detected a short to ground on the pump motor circuit.