DTC P1788: 3-2T/CCS Solenoid Open Circuit Or DTC P1789: 3-2T/CCS Solenoid Short Circuit: Description
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.
DTC P1788 or P1789 is set when PCM detects (after 2 drive cycles) an open or short in 3-2 timing/coasting clutch solenoid circuit.