Symptom Chart: Steering System and NVH

• Diagnostics in this article assume a certain skill and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
• NVH symptoms should be identified using the diagnostic tools available. For a list of these tools, an explanation of their uses and a glossary of common terms, REFER to: Noise, Vibration and Harshness (NVH) . . Since it is possible any one of multiple systems may be the cause of a symptom, it may be necessary to use a process of elimination type diagnostic approach to pinpoint the responsible system. If this is not the causal system for the symptom, REFER to: Noise, Vibration and Harshness (NVH) . for the next likely system and continue diagnostics.
• If equipped, the Lane Keeping System (LKS) can interfere with accurate EPAS diagnostics. Disable the Lane Keeping System (LKS) before test driving the vehicle to diagnose EPAS concerns. For information on disabling the Lane Keeping System (LKS), refer to Owner's Literature.

There are multiple conditions (overheating protection, high voltage, low voltage, etc.) which result in limited or reduced assist from the EPAS system. Address all existing PSCM Diagnostic Trouble Codes (DTCs) prior to diagnosing any assist symptoms.