Ignition "OFF".
Ignition "ON"& Engine "OFF".
Connect scantool and select "Diagnostic Trouble Codes(DTCs)"mode
Using a scantool, Clear DTC.
Select "Diagnostic Trouble Codes(DTCs)"mode again.
Are any DTCs present ?
YES
Substitute with a known-good steering column & EPS unit assembly and check for proper operation. If the problem is corrected,replace steering column & EPS unit assembly and then go to "Verification of Vehicle Repair" procedure.
NO
Fault is intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and EPS CM memory is not cleared yet. Go to "Verification of Vehicle Repair"procedure.