Air Injection System - CALIF: Description

NOTE: Federal models use a reed valve-type air induction system. See appropriate article in this section.

The air pump air injection system is designed to reduce hydrocarbon (HC) and carbon monoxide (CO) content of exhaust gases by injecting a controlled amount of compressed air into the exhaust manifold.

System components and application vary between models. Typical components of the system are: a belt-driven air pump with integral relief valve, air control valve with relief valve, air by-pass valve, water thermo valves, vacuum delay valve, check valve and various hoses and piping. A heat hazard warning system is used on GLC Wagon models to prevent exhaust system overheating.