Navistar MaxxForce 15 Service Manual page 6

2
Service Diagnosis
Service diagnosis is an investigative procedure that
must be followed to find and correct an engine
application problem or an engine problem.
If the problem is engine application, see specific
vehicle manuals for further diagnostic information.
If the problem is the engine, see specific Engine
Diagnostic Manual for further diagnostic information.
Prerequisites for Effective Diagnosis
• Availability of gauges, diagnostic test equipment,
and diagnostic software.
• Availability of current information for engine
application and engine systems.
ENGINE SERVICE MANUAL
• Knowledge of the principles of operation for
engine application and engine systems.
• Knowledge to understand and do procedures in
diagnostic and service publications.
Technical Service Literature required for Effective
Diagnosis
• Engine Service Manual
• Engine Diagnostic Manual
• Diagnostics Forms
• Electronic Control Systems Diagnostics Forms
• Service Bulletins