1.9L CEC Tests W/Codes: Description: Notes

This electronically controlled system monitors various engine/vehicle functions to control engine operation and lower exhaust emissions while maintaining good fuel economy and driveability.

The Electronic Control Module (ECM) is the "brain" of this system. The ECM controls engine-related systems by constantly adjusting engine operation to maintain good vehicle performance under all normal driving conditions.

Fig 1: 1.9L Engine Closed Loop Emission Control System Schematic

Fig 2: Engine Compartment Component Locations