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Home >> Jeep >> 2021 >> Cherokee High Altitude, Full Time T/Case Control >> Repair and Diagnosis >> Steering >> Steering Control Systems >> (Electronic Power Steering (EPS) Module - Electrical Diagnostics) >> DTC Troubleshooting >> C221F-00-Ecu Not Initialized >> Diagnostic Test

Diagnostic Test

  1. VERIFY THE DTC IS ACTIVE 
    NOTE:

    This DTC must be active for the results of this test to be valid.

    1. Perform any Service Bulletins that may apply.
    2. Turn the ignition on.
    3. With the scan tool, read DTCs and record on vehicle work order.
    4. With the scan tool, erase DTCs.
    5. Start the engine.
    6. Turn the steering wheel from stop to stop and back to center.
    7. With the scan tool, read the EPS DTCs.

      Is the DTC active at this time?

      Yes 

      • Go To  2

      No 

      • The condition or conditions that originally set this DTC are not present at this time. Using the appropriate SYSTEM WIRING DIAGRAMS as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension and repair as necessary. If no problems are found, test complete.
      • Perform the EPS VERIFICATION TEST. Refer to EPS VERIFICATION TEST  .
  2. INITIALIZE EPS MODULE 
    1. With the scan tool, perform the EPS Learn routine.
    2. Turn ignition off.
    3. Cycle the ignition from off to on.
    4. Wait ten seconds.
    5. With the scan tool, read the EPS DTCs.

      Does the DTC remain active?

      Yes 

      • Replace the Electric Power Steering (EPS) Module in accordance with Service Information. Refer to GEAR, REMOVAL .
      • Perform the EPS VERIFICATION TEST. Refer to EPS VERIFICATION TEST  .

      No 

      • Test complete.