Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with the
  system functions. Refer to 
Clutch System Description and Operation.
Visual/Physical Inspection
|     •  | Inspect the easily accessible or visible system components for
  obvious damage or conditions which could cause the symptom. | 
 
|     •  | Inspect the clutch master cylinder for the correct fluid level. | 
 
|     •  | Inspect the hydraulic clutch lines for dents, kinks or other obvious
  damage that may affect the clutch system operations. | 
 
|     •  | Inspect the clutch system for contamination of dirt, oil, or other
  substances that may affect the clutch system operations. | 
 
Intermittent
Test the vehicle under the same conditions that the customer reported,
  in order to verify the system is operating properly.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order
  to diagnose the symptom: