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Home >> Cadillac >> 2014 >> XTS Base >> Repair and Diagnosis >> Steering >> Power Steering System >> Repair Instructions >> Power Steering Assist Motor Replacement >> Removal Procedure
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Removal Procedure

CAUTION:

Electrostatic discharge (ESD) can damage many solid-state electrical components. ESD susceptible components may or may not be labeled with the ESD symbol. Handle all electrical components carefully. Use the following precautions in order to avoid ESD damage:

  • Touch a metal ground point in order to remove your body's static charge before servicing any electronic component; especially after sliding across the vehicle seat.
  • Do not touch exposed terminals. Terminals may connect to circuits susceptible the ESD damage.
  • Do not allow tools to contact exposed terminals when servicing connectors.
  • Do not remove components from their protective packaging until required to do so.
  • Avoid the following actions unless required by the diagnostic procedure:
    • Jumpering or grounding of the components or connectors.
    • Connecting test equipment probes to components or connectors. Connect the ground lead first when using test probes.
  • Ground the protective packaging of any component before opening. Do not rest solid-state components on metal workbenches, or on top of TVs, radios, or other electrical devices.
CAUTION:

During removal and installation, the electric belt drive rack and pinion steering gear is extremely susceptible to damage. Dropping or prying on the electric belt drive motor controller module and/or electric belt drive rack and pinion steering gear may cause damage. If damage occurs, the electric belt drive motor controller module and/or electric belt drive rack and pinion steering gear will need to be replaced.

CAUTION:

Care must be taken during removal and installation of the electric belt drive rack and pinion steering gear to not hit or break the electric belt drive motor controller module or module harness connectors. If the module or connectors are damaged, the electric belt drive motor controller module will need to be replaced.

  1. Remove the electric belt drive rack and pinion steering gear from the vehicle. Refer to Electric Belt Drive Rack and Pinion Steering Gear Replacement (FWD, LFX With NJ2) .
    2. NOTE:

    The torque sensor wiring harness is not repairable. Do not attempt to repair the harness under any circumstances. If the harness is damaged then the steering gear must be replaced.

    NOTE:

    When installing the steering gear into a vise and clamping on the barrel of the housing, be careful not to pinch the torque sensor wire harness. If available, use soft jaw vise.

  2. Place the steering gear in a vise.
    3. NOTE:

    After the steering gear has been centered, do not allow the gear to move off the center position.

  3. Rotate the input shaft to center the rack in its travel. Measure the outer tie rod to housing to verify the center of travel.
  4. Remove the RH inner tie rod. Refer to Steering Linkage Inner Tie Rod Replacement (NXC) , Steering Linkage Inner Tie Rod Replacement (NJ2) .
    5. Fig 1: Torque Sensor Wire Harness Connecto
    GM3448408Courtesy of GENERAL MOTORS COMPANY
  5. Clean any dirt from the torque sensor wire harness connector (1) area and disconnect the connector from the power steering assist motor controller module.
    6. Fig 2: Steering Gear
    GM3448412Courtesy of GENERAL MOTORS COMPANY
  6. Using the appropriate cleaning materials, remove any dirt and debris form the steering gear where the housing will be separated (1) and where the power steering assist motor assembly connects to the steering gear (2). This will ensure that no contaminants enter the steering gear when the housing is separated.
    7. Fig 3: Steering Gear Housing Bolts
    GM3448414Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not loosen the belt drive motor controller module pivot bolt at this time. If bolt is loosened you will not be able to record the belt tension.

  7. Remove the steering gear housing bolts (1).
    8. Fig 4: Steering Gear Housing
    GM3448415Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Carefully slide the boot down the inner tie rod, so that the boot does not collapse and roll up.

  8. Separate the steering gear housing by using a rubber mallet to tap on the outboard steering gear housing (1) to release the dowel pins and remove the outboard steering gear housing from the steering gear housing.
  9. Inspect inside the steering gear housing for contamination and the belt for damage. If there is contamination in the steering gear housing or the belt is damaged, replace the steering gear. Refer to Electric Belt Drive Rack and Pinion Steering Gear Replacement (FWD, LFX With NJ2) .
    10. Fig 5: Power Steering Assist Motor Assembly Pivot Bolt
    GM3448417Courtesy of GENERAL MOTORS COMPANY
  10. Remove the power steering assist motor assembly pivot bolt (1).
    11. Fig 6: Power Steering Assist Motor
    GM3448420Courtesy of GENERAL MOTORS COMPANY
  11. Rotate the power steering assist motor assembly (1) to remove the belt tension.
  12. Pull the power steering assist motor assembly (1) toward the input shaft until it is released from the steering gear housing to release the belt form the pulley and remove the power steering assist motor assembly.
  13. Remove the belt form the steering gear and discard.
  14. Install a rag over the large rack pulley to prevent dirt and debris from falling into the steering gear housing.
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