Air Injection System (XJS)
The air injection system is used during warm-up to reduce emissions. Air injection cannot be used while oxygen sensor is in operation. The XJS air injection system includes a thermal switch, check valve, air injection switching module, air switching valve, diverter valve, air rails and air pump.
Diverter valve operates in response to abrupt increase in manifold vacuum and diverts secondary air to atmosphere for 2-3 seconds. The valve senses sudden increases in intake manifold vacuum and diverts air away from exhaust system, preventing backfire.