Impreza Wagon FWD F4-1820cc 1.8L SOHC (1995)
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Malfunction Indicator Lamp: Testing and Inspection
The check engine lamp should illuminate when the key is ON and the engine is OFF. If it does not turn on, the most likely cause is a faulty bulb. If the
bulb is good then test the wiring to the ECM for an open or short to ground. If a complete circuit to the bulb is present then the engine control module is
suspect.