Initial Inspection and Diagnostic Overview

Diagnostic Starting Point - Engine Mechanical

Begin the system diagnosis by reviewing the:

* Disassembled Views ([1][2]Diagrams)
* Engine Component Description (Engine Component Description)
* Lubrication Description - Main Pressure Below 55 psi with Cylinder Deactivation (Active Fuel Management) Off (Description and Operation)
* Lubrication Description - Main Pressure Above 55 psi with Cylinder Deactivation (Active Fuel Management) Off (Description and Operation)
* Lubrication Description - Main Pressure Below 55 psi with Cylinder Deactivation (Active Fuel Management) On (Description and Operation)
* Lubrication Description - Main Pressure Above 55 psi with Cylinder Deactivation (Active Fuel Management) On (Description and Operation)
* Cylinder Deactivation (Active Fuel Management) System Description (Cylinder Deactivation (Active Fuel Management) System Description)
* Drive Belt System Description (Description and Operation)

Reviewing the description and operation information helps you determine the correct symptom diagnostic procedure when a condition exists. Reviewing the description and operation information also helps you determine if the condition described by the customer is normal operation. Refer to Symptoms - Engine Mechanical (- Symptoms - Engine Mechanical) in order to identify the correct procedure for diagnosing the system and where the procedure is located.