Description

The ECU contains a built-in, self-diagnosis system detects which troubles within the engine signal network and then flashed a warning on the "CHECK" engine warning light on the instrument panel flashes.

By analyzing various signals shown in the tables (See page 28 or 30) the ECU detects system malfunctions which are related to the various operating parameter sensors or actuator. The ECU stores the failure code associated with the detected failure until the diagnosis system is cleared by removing the EFI fuse with the ignition switch OFF.

A "CHECK" engine warning light on the instrument panel informs the driver that a malfunction has been detected. The light goes off automatically when the malfunction has been cleared.

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