DTC P1746: EPC Solenoid Open Circuit Or DTC P1747: EPC Solenoid Short Circuit: Notes
WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit reference, see WIRING DIAGRAMS and CONNECTOR IDENTIFICATION