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Diagnostic Test

  1. INSPECT THE STEERING GEAR FOR INCORRECT INSTALLATION, DAMAGE OR MECHANICAL FAILURE 
    CAUTION:

    Do NOT disconnect the Torque Sensor (Grey) harness connector on the electric power steering gear, as permanent damage can occur to the Electric Power Steering (EPS) Module.

    NOTE:

    Make sure the Torque Sensor (Grey) harness connector is connected properly before continuing with this procedure. 

    1. Turn the ignition off.
      NOTE:

      Check with customer for unusual driving terrain (e.g. mud, snow, ice) or aggressive driving maneuvers at the time of set condition. 

    2. Visually inspect the Steering Gear for Improper installation, damage or mechanical failure. Refer to GEAR, INSTALLATION .

      Were any problems found?

      Yes 

      No 

      • Go To  2
  2. CHECK FOR AN ACTIVE DTC 
    NOTE:

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

    NOTE:

    Let the vehicle sit for 30 minutes before continuing with this test. 

    1. Turn the ignition on.
    2. With the scan tool, read Electric Power Steering (EPS) DTCs and record on vehicle work order.
    3. With the scan tool, erase EPS DTCs.
    4. Start the engine.
    5. Turn the steering wheel from stop to stop four to five times.
    6. With the scan tool, read EPS DTCs.

      Is the DTC active?

      Yes 

      • Go To  3

      No 

      • The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring harness and electrical connectors.
      • Perform the EPS VERIFICATION TEST. Refer to: EPS VERIFICATION TEST  .
  3. CHECK RELATED HARNESS CONNECTIONS 
    NOTE:

    Do not disconnect the Torque Sensor (Grey) harness connector and make sure it is connected properly. 

    1. Disconnect the EPS Module harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect the EPS Module harness connectors. Be certain that the harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read EPS Module DTCs.

      Did the DTC return?

      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 

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