DTC P0300: Random / Multiple Cylinder Misfire Detected (TO 12/2010); DTC P0301: Cylinder 1 Misfire Detected (TO 12/2010); DTC P0302: Cylinder 2 Misfire Detected (TO 12/2010); DTC P0303: Cylinder 3 Misfire Detected (TO 12/2010); DTC P0304: Cylinder 4 Misfire Detected (TO 12/2010); DTC P0305: Cylinder 5 Misfire Detected (TO 12/2010); DTC P0306: Cylinder 6 Misfire Detected (TO 12/2010): Wiring Diagram
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
Fuel injector assembly circuit:
Mass air flow meter circuit: Refer to DTC P0102. Refer to WIRING DIAGRAM