Corolla 2E Vacuum Connection | EricTheCarGuy Mar 21, 2015Corolla 2E Vacuum Connection. The vacuum line was messed up by the previous owner and not until I found a vacuum diagram (attached) I attempted to change it. The sensor (bimetal valve assy part # 25810) on the coolant attached to the manifold was broken and the vacuum line plugged. The idle up vacuum was rerouted and 1 port at the[PDF] Toyota 5a Engine Vacuum Connections Vacuum Diagram on toyota 2E engine Engine codes. Toyota has produced a wide variety of automobile engines, including inline-four and V6 engines. The company follows a simple naming system for their modern engines: The first numeric characters VACUUM DIAGRAMS Repair Guide - AutoZone Print Following are vacuum diagrams for most of the engine and emissions package combinations covered by this guide. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the vehicle emission control information label, if present.