Diagnostics Process - Variable Effort Steering (VES)
PROCEDUREWhen servicing the variable effort steering Electronic Variable Orifice (EVO)/ system, perform the following steps in order. Not following these steps may result in the loss of important diagnostic data. This may lead to difficult and time-consuming diagnostic procedures.
1. Perform a vehicle preliminary diagnostic inspection.
2. Perform a power steering system test.
3. Inspect the variable effort steering system. Refer to Variable Effort Steering System Check. If any Diagnostic Trouble Codes (DTCs) are displayed, note the last malfunction that occurred. Diagnose and repair this malfunction first.
Testing and Inspection
4. If no DTCs or mechanical component malfunctions are present, or if the condition is intermittent and not reproducible, test drive the vehicle while using the automatic snapshot feature of the scan tool. Perform normal acceleration, stopping, and turning maneuvers. If this does not reproduce the malfunction, refer to Intermittent Diagnosis.
Testing and Inspection
5. After all the system malfunctions have been corrected, clear the EVO DTCs and test drive the vehicle.