Power Steering Assist Motor Replacement
Single Use Fasteners and Components
  • Air Conditioning Compressor Hose Seal
  • Air Conditioning Compressor and Condenser Hose Seal
  • Drive Motor Mount Bolt[2x]
  • Drive Motor Rear Mount Bracket Bolt[6x]
  • Electric Belt Drive Rack and Pinion Steering Gear Belt
  • Output Shaft Retaining Ring[2x]
  • Output Shaft Seal[2x]
  • Power Steering Assist Motor Seal@Power Steering Assist Motor
  • Power Steering Assist Motor Seal@Steering Gear Housing Cover
  • Steering Gear Bolt[10x]
  • Steering Gear Boot Clamp-Large[2x]
Special Tools

Power Steering

  • CH-22610 Keystone Clamp Pliers
  • J-42188-B Ball Joint Separator
  • GE-50576-A Acoustic Belt Tension Tester
  • EN-36857 Engine Lift Bracket
  • EN-52059 Engine Support Fixture Adapter Bolts - M10
  • CH-53104 Steering Gear Idler Pulley Holder

    Equivalent regional tools:Special Tools

Wheel Drive Shafts

DT-45859 Axle Remover

Equivalent regional tools:Special Tools

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure includes the following steps:

  • Identify how to disable high voltage.
  • Identify how to test for the presence of high voltage.
  • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

  • Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
  • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
    • Visually and functionally inspect the gloves before use.
    • Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.

Failure to follow the procedures may result in serious injury or death.

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, all EPS components including mechanical and/or electrical is extremely susceptible to damage. Dropping or prying on any EPS component may cause internal damage. If damage occurs or a part is dropped, the EPS component must be replaced.

Caution: Care must be taken during removal and installation of the Electronic Power Steering (EPS) components to not hit or break the EPS motor/controller module or module harness connectors. If the EPS motor/ controller module or module connectors are damaged, the complete component must be replaced.

Removal Procedure
  1. Remove the front tire and wheel assemblies.Tire and Wheel Removal and Installation
  2. Place match marks on the steering linkage inner tie rod nut and the steering linkage inner tie rod.

    3. Object ID: 5924242
  3. Front Cradle(2)»Remove—Front Cradle Removal and Installation

    4. Object ID: 6407342
  4. Retainer(4)»Disengage[2x]
  5. Heater Coolant Heater Inlet Hose(1)@Hybrid/Electric Vehicle Battery Coolant Pump- Right Side»Disconnect
  6. Front Electric Drive Transmission Module Hose(2)@Hybrid/Electric Vehicle Battery Coolant Pump- Left Side»Disconnect

    7. Object ID: 5918474
  7. Engine Wiring Harness Retainer(1)@Front Cradle»Remove[4x]
  8. Engine Wiring Harness Connector(2)@Hybrid/Electric Vehicle Battery Coolant Pump- Left Side and Right Side»Disconnect[2x]
  9. Engine Wiring Harness Ground Bolt(3)»Remove[2x]
  10. Engine Control Module and Engine Wiring Harness Ground Bolt(4)»Remove

    11. Object ID: 5918482
  11. Engine Wiring Harness Retainer(1)@Electric Belt Drive Rack and Pinion Steering Gear»Remove
  12. Engine Wiring Harness Connector(2)@Electric Belt Drive Rack and Pinion Steering Gear»Disconnect[2x]
  13. Engine Wiring Harness Connector(3)@Electric Belt Drive Rack and Pinion Steering Gear»Disconnect[2x]
  14. Reposition the engine wiring harness (4).

    15. Object ID: 5921565
  15. Battery Negative Cable Ground Bolt- Left Side(1)»Remove

    16. Object ID: 5921569
  16. Battery Negative Cable Ground Bolt- Right Side(1)»Remove

    17. Object ID: 5893651
  17. Assemble the following tools to the electric drive transmission:
    • EN-52059 Engine Support Fixture Adapter Bolts - M10 (1)
    • EN-36857 Engine Lift Bracket (2)
    • Overhead Hoist Hooks (3)

    Object ID: 5922253

    Note: Left side shown, right side similar.

  18. Using a suitable flat bladed tool (1), release the left and right side front wheel drive half shafts from the front electric drive transmission module.

    19. Object ID: 5921727
  19. Output Shaft Retaining Ring- Left Side and Right Side(1)»Remove and DISCARD[2x]
  20. Output Shaft Seal- Left Side and Right Side(2)»Remove and DISCARD[2x]

    21. Object ID: 5902700
  21. Drive Motor Rear Mount Bracket Bolt(1)»Remove and DISCARD[6x]

    22. Object ID: 6082035

    Note: Some components not shown for graphic clarity.

  22. Drive Motor Mount Nut(1)»Remove
  23. Drive Motor Mount Bolt(2)»Remove and DISCARD[2x]

    24. Object ID: 5902697
  24. Separate the front cradle (1) from the front electric drive transmission assembly.

    25. Object ID: 5823940

    Note: Left side shown, right side similar.

  25. Steering Linkage Outer Tie Rod Nut- Left Side and Right Side(1)»Loosen[2x]

    26. Object ID: 5830459

    Note: Left side shown, right side similar.

    Caution: Do not attempt to disconnect a steering linkage joint by driving a wedge between the joint and the attached part. Seal damage may result which will cause premature failure of the joint.

  26. UsingJ-42188-B Ball Joint Separator (1), remove the steering linkage outer tie rods from the left and right side steering knuckles.

    27. Object ID: 5902729
  27. Steering Linkage Outer Tie Rod Nut(1)»Remove[2x]

    28. Object ID: 5902730
  28. Steering Gear Bolt- Upper(1)»Remove[2x]
  29. Steering Gear Nut(4)»Remove[2x]
  30. Steering Gear Bolt- Lower(2)»Remove[2x]
  31. Electric Belt Drive Rack and Pinion Steering Gear(3)»Remove

    32. Object ID: 5909899

    Note: Left side shown, right side similar.

  32. Steering Linkage Outer Tie Rod- Left Side and Right Side(1)»Remove[2x]
  33. Steering Linkage Inner Tie Rod Nut- Left Side and Right Side(2)»Remove[2x]

    34. Object ID: 5909902

    Note: Left side shown, right side similar.

  34. Steering Gear Boot Clamp-Small- Left Side and Right Side(1)»Remove[2x]

    35. Object ID: 5909905

    Note: Left side shown, right side similar.

  35. Steering Gear Boot Clamp-Large- Left Side and Right Side(1)»Remove and DISCARD[2x]

    36. Object ID: 5909907

    Note: Left side shown, right side similar.

  36. Steering Gear Boot- Left Side and Right Side(1)»Remove[2x]

    37. Object ID: 5909909

    Note: Left side shown, right side similar.

    Caution: Holding the steering gear rack bar with anything other than a non-serrated adjustable wrench will cause damage to the steering gear.

  37. Cover the electric belt drive rack and pinion steering gear bar (2) with a clean shop towel.
  38. Hold the electric belt drive rack and pinion steering gear bar (2) with a non-serrated adjustable wrench.
  39. Using a universal inner tie rod wrench, loosen the left and right side steering linkage inner tie rods (1).

    40. Object ID: 5909910

    Note: Left side shown, right side similar.

  40. Steering Linkage Inner Tie Rod- Left Side and Right Side(1)»Remove[2x]

    41. Object ID: 5838634
  41. Steering Gear Bolt(1)»Remove and DISCARD[6x]
  42. Save 2 steering gear bolts for the installation of the power steering assist motor.
  43. Steering Gear Housing Cover(2)»Remove
  44. Power Steering Assist Motor Seal(3)@Steering Gear Housing Cover»Remove and DISCARD

    45. Object ID: 5838641
  45. Remove the steering gear idler pulley.
  46. Electric Belt Drive Rack and Pinion Steering Gear Belt(1)»Remove and DISCARD

    47. Object ID: 5838642
  47. Disconnect the electrical connectors.(1)

    48. Object ID: 5838637
  48. Steering Gear Bolt(1)»Remove and DISCARD[4x]

    49. Object ID: 5838643
  49. Power Steering Assist Motor Seal(1)@Power Steering Assist Motor»Remove and DISCARD
  50. Power Steering Assist Motor(2)»Remove

Belt Tension Specification

Use this table after weighing the electric belt drive rack and pinion steering gear belt to determine the tension needed to service the power steering assist motor.

Power Steering Assist Motor Replacement

Belt Tension Table

Belt Mass (g)

Service Tension Range (Hz)

Upper Limit

Nominal

Lower Limit

25.0

262

254

247

26.0

258

250

243

27.0

254

246

239

28.0

251

243

236

29.0

247

240

232

30.0

244

237

229

31.0

241

234

226

32.0

238

231

223

33.0

236

228

221

34.0

233

225

218

35.0

231

223

216

36.0

228

221

213

Installation Procedure

    Object ID: 5838643
  1. Power Steering Assist Motor Seal(1)@Power Steering Assist Motor»Install NEW
  2. Power Steering Assist Motor(2)»Install

    3. Object ID: 5838637

    Caution: Fastener Caution.

  3. Steering Gear Bolt(1)»Install NEW and tighten[4x]—Fastener Specifications

    4. Object ID: 5838642
  4. Connect the electrical connectors.(1)
  5. Using a digital scale, weigh the NEW electric belt drive rack and pinion steering gear belt. Record the weight and use the chart to determine the tension of the electric belt drive rack and pinion steering gear belt. Refer to the Belt Tension Table for proper belt tension specification.

    6. Object ID: 5838641
  6. Electric Belt Drive Rack and Pinion Steering Gear Belt(1)»Install NEW
  7. Install the steering gear idler pulley.

    8. Object ID: 5868077

    Note: With the steering linkage inner tie rods removed, there is no stop on the end of the steering rack travel.

  8. Install an appropriate tool (1) on the input shaft (2) and rotate the input shaft as close to end to end travel as possible 3 times to manually break in the electric belt drive rack and pinion steering gear belt.
  9. Ensure the electric belt drive rack and pinion steering gear rotates freely.

    10. Object ID: 5872004
  10. Move the steering rack to centered position. The center position can be found by taking a measurement of the distance (a) from the end of the steering gear housing to the end of the steering gear rack (1). This measurement should be 61.1 mm(2.4 in).

    11. Object ID: 5868103
  11. To adjust the belt tension, loosen the steering gear idler pulley (4) and use the tool installed to adjust the belt tension as necessary. Tighten the steering gear idler pulley (4) when taking measurements.
  12. Install the CH-53104 Steering Gear Idler Pulley Holder (2).
  13. Install and tighten the 2 steering gear bolts (3) that were saved from the removal steps.

    14. Note: Install a rubber pad to the tightening surface to prevent damage to the idler pulley.

  14. Install an appropriate sized C-clamp (1) with a rubber pad on the tightening surface to tighten the steering gear idler pulley to the correct specification.

    15. Note: NEVER hold the tester by hand while taking measurements or the readings will be inaccurate.

  15. Place the body of the GE-50576-A Acoustic Belt Tension Tester on a flat surface.

    16. Object ID: 5871794
  16. Position the microphone of the GE-50576-A Acoustic Belt Tension Tester (1) at the outboard location of the electric belt drive rack and pinion steering gear belt (2).

    17. Caution: Never use a sharp object to strum the belt as belt damage may occur. If the belt is damaged, the electric belt drive rack and pinion steering gear will need to be replaced.

    Note: Strum the electric belt drive rack and pinion steering gear belt as close as possible to the center position between the two electric belt drive rack and pinion steering gear pulleys to achieve the most accurate readings.

  17. Use an allen wrench or finger to strum the steering gear belt at the center location between the two pulleys three times to get an average belt tension reading.

    18. Note: When testing frequency, there should be a difference of 10–40 Hz between the inboard and outboard measurements. If you are not seeing a difference in the measurements, rotate the electric belt drive rack and pinion steering gear 90 degrees and try again.

  18. Record the average reading from the outboard frequency test.

    19. Object ID: 5871796
  19. Position the microphone of the GE-50576-A Acoustic Belt Tension Tester (1) at the inboard location of the electric belt drive rack and pinion steering gear belt (2).
  20. Use an allen wrench or finger to strum the steering gear belt at the center location between the two pulleys three times to get an average belt tension reading.
  21. Record the average reading from the inboard frequency test.

    22. Note: Increasing the belt tension increases the frequency. Reducing the belt tension reduces the frequency.

  22. Find the average of the inboard and outboard measurements and compare to the chart. If the frequency is within specification, continue. If not, repeat steps 10–21 until accurate frequency specification is achieved.
  23. Apply the final torque for the steering gear idler pulley before removing the tools. Fastener Specifications
  24. Remove the C-clamp used to tighten the steering gear idler pulley.
  25. Confirm the inboard and outboard measurements are still within specification. If not, repeat steps 15–21 until accurate frequency specification is achieved.
  26. Remove the GE-50576-A Acoustic Belt Tension Tester.
  27. Remove and DISCARD the 2 steering gear bolts used during the belt tension procedure.
  28. Remove the CH-53104 Steering Gear Idler Pulley Holder.

    29. Object ID: 5838634
  29. Power Steering Assist Motor Seal(3)@Steering Gear Housing Cover»Install NEW
  30. Steering Gear Housing Cover(2)»Install
  31. Steering Gear Bolt(1)»Install NEW and tighten[6x]—Fastener Specifications

    32. Object ID: 5909910

    Note: Left side shown, right side similar.

  32. Steering Linkage Inner Tie Rod- Left Side and Right Side(1)»Install[2x]

    33. Object ID: 5909909

    Caution: Holding the steering gear rack bar with anything other than a non-serrated adjustable wrench will cause damage to the steering gear.

    Note: Left side shown, right side similar.

  33. Cover the electric belt drive rack and pinion steering gear bar (2) with a clean shop towel.
  34. Hold the electric belt drive rack and pinion steering gear bar (2) with a non-serrated adjustable wrench.

    35. Caution: Refer to Component Fastener Tightening Caution.

  35. Using a universal inner tie rod wrench, tighten the left and right side steering linkage inner tie rods (1). Fastener Specifications

    36. Object ID: 5840653

    Note: Left side shown, right side similar.

  36. Position a NEW left and right side steering gear boot clamp-inner (1) on the left and right side steering gear boots (2).

    37. Object ID: 5909907

    Note: Left side shown, right side similar.

  37. Steering Gear Boot- Left Side and Right Side(1)»Install[2x]

    38. Object ID: 5909982

    Note: Left side shown, right side similar.

  38. Steering Gear Boot Clamp-Large- Left Side and Right Side(1)»Tighten[2x]- use CH-22610 Keystone Clamp Pliers(2)

    39. Object ID: 5909902

    Note: Left side shown, right side similar.

  39. Steering Gear Boot Clamp-Small- Left Side and Right Side(1)»Install[2x]

    40. Object ID: 5909899

    Note: Left side shown, right side similar.

  40. Install the left and right side steering linkage inner tie rod nuts (2) until aligned with the previously placed matched mark on the steering linkage inner tie rod.
  41. Steering Linkage Outer Tie Rod- Left Side and Right Side(1)»Install[2x]

    42. Object ID: 5902730
  42. Electric Belt Drive Rack and Pinion Steering Gear(3)»Install
  43. Steering Gear Bolt- Upper(1)»Install and tighten[2x]—Fastener Specifications
  44. Steering Gear Bolt- Lower(2)»Install[2x]
  45. Steering Gear Nut(4)»Install[2x]
  46. Steering Gear Bolt- Lower(2)»Tighten[2x]—Fastener Specifications

    47. Object ID: 5902729
  47. Steering Linkage Outer Tie Rod Nut(1)»Install and tighten[2x]—Fastener Specifications

    48. Object ID: 5902697
  48. Install the front electric drive transmission module assembly to the front cradle (1).

    49. Object ID: 6082035

    Note: Some components not shown for graphic clarity.

  49. Drive Motor Mount Bolt(2)»Install NEW[2x]
  50. Drive Motor Mount Nut(1)»Install

    51. Caution: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

  51. Drive Motor Mount Bolt(2)»Tighten[2x]—Fastener Specifications

    52. Object ID: 5902700
  52. Drive Motor Rear Mount Bracket Bolt(1)»Install NEW and tighten[6x]—Fastener Specifications

    53. Object ID: 5921727
  53. Output Shaft Retaining Ring- Left Side and Right Side(1)»Install NEW[2x]
  54. Output Shaft Seal- Left Side and Right Side(2)»Install NEW[2x]

    55. Object ID: 5903392

    Note: Left side shown, right side similar.

  55. Front Wheel Drive Half Shaft- Left Side and Right Side@Front Electric Drive Transmission Module(1)»Install[2x]

    56. Object ID: 5893651
  56. Remove the following tools from the electric drive transmission:
    • EN-52059 Engine Support Fixture Adapter Bolts - M10 (1)
    • EN-36857 Engine Lift Bracket (2)
    • Overhead Hoist Hooks (3)

    Object ID: 5921569
  57. Battery Negative Cable Ground Bolt- Right Side(1)»Install and tighten—Fastener Specifications

    58. Object ID: 5921565
  58. Battery Negative Cable Ground Bolt- Left Side(1)»Install and tighten—Fastener Specifications

    59. Object ID: 5918482
  59. Position the engine wiring harness (4) in place.
  60. Engine Wiring Harness Connector(3)@Electric Belt Drive Rack and Pinion Steering Gear»Connect[2x]
  61. Engine Wiring Harness Connector(2)@Electric Belt Drive Rack and Pinion Steering Gear»Connect[2x]
  62. Engine Wiring Harness Retainer(1)@Electric Belt Drive Rack and Pinion Steering Gear»Install

    63. Object ID: 5918474
  63. Engine Control Module and Engine Wiring Harness Ground Bolt(4)»Install and tighten[1x]—Fastener Specifications
  64. Engine Wiring Harness Ground Bolt(3)»Install and tighten[2x]—Fastener Specifications
  65. Engine Wiring Harness Connector(2)@Hybrid/Electric Vehicle Battery Coolant Pump- Left Side and Right Side»Connect[2x]
  66. Engine Wiring Harness Retainer(1)@Front Cradle»Install[4x]

    67. Object ID: 6407342
  67. Front Electric Drive Transmission Module Hose(2)@Hybrid/Electric Vehicle Battery Coolant Pump- Left Side»Connect
  68. Heater Coolant Heater Inlet Hose(1)@Hybrid/Electric Vehicle Battery Coolant Pump- Right Side»Connect
  69. Retainer(4)»Engage[2x]

    70. Object ID: 5924242
  70. Front Cradle(2)»Install—Front Cradle Removal and Installation
  71. Measure and adjust the front toe.Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment
  72. Calibrate the power steering control module. Power Steering Control Module Calibration