Theory Of Operation
WARNING: This page is about a different variant/trim than selected.
The Exhaust Gas Recirculation (EGR) Cooling Bypass system is used to redirect the EGR gases around the EGR Cooler when the engine is under certain operating conditions. The system consists of two devices.
The EGR Cooling Bypass Solenoid is a 2-wire electrical device. The solenoid is located on the Intake Manifold. This solenoid controls the crankcase vacuum supply to the EGR Cooling Bypass Actuator.
The EGR Cooling Bypass Actuator is a typical 'vacuum-diaphragm' device. The actuator is located on the EGR Cooler.
The Powertrain Control Module (PCM) will light a MIL lamp after this monitor runs and fails in two consecutive drive cycles. The PCM will turn off the MIL lamp after the diagnostic passes in four consecutive drive cycles.