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Home >> Chevrolet >> 2004 >> Optra (CANADA) L4-2.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Diagnostic Starting Point - Engine Controls
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Diagnostic Starting Point - Engine Controls




Diagnostic Starting Point - Engine Controls

Begin the system diagnosis with the Diagnostic System Check - Engine Controls Initial Inspection and Diagnostic Overview. The Diagnostic System Check-Engine Controls will provide the following information:

* The identification of the control modules which command the system
* The ability of the control modules to communicate through the serial data circuit
* The identification of any stored DTCs and the codes' statuses

The use of the Diagnostic System Check-Engine Controls will identify the correct procedure for diagnosing the system and where the procedure is located.