Engine Diagnosis General Description

Engine Diagnosis General Description

The engine and emission control systems in this vehicle are controlled by ECM. ECM has an OBD system which detects malfunctions in the system and any abnormalities in the parts that influence the engine exhaust emission. When diagnosing engine troubles, be sure to have full understanding of the outline of OBD System Description OBD System Description
and each item in "Precautions for Diagnosing Trouble" under Service Precautions Precautions for Engine
and execute diagnosis according to Engine and Emission Control System Check Engine and Emission Control System Check.

In terms of structure and operation, the emission system, engine mechanical, engine cooling system, ignition system, exhaust system, etc. are closely related. In case of an engine trouble, even when the MIL does not turn on, it should be diagnosed according to Engine and Emission Control System Check Engine and Emission Control System Check.