DTC P0351: Ignition Coil "A" Primary/Secondary Circuit, DTC P0352: Ignition Coil "B" Primary/Secondary Circuit, DTC P0353: Ignition Coil "C" Primary/Secondary Circuit, DTC P0354: Ignition Coil "D" Primary/Secondary Circuit: Wiring Diagram
WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.