Subframe Assembly - Rear (Remove and Install)

Correction code 3001020130010201
  • 1134520-00-A Kit, EPB Release, Handheld
  • 1129348-00-AXP-10 Power Supply, XP-10
  • 1099645-00-BFixture, Subframe, Model 3
  • 1140311-00-ALever Lock, HV Connector, Model 3

SPECIAL TOOLS

Kit, EPB Release, Handheld (1134520-00-A)
XP-10 Power Supply, XP-10 (1129348-00-A)
Fixture, Subframe, Model 3 (1099645-00-B)
Lever Lock, HV Connector, Model 3 (1140311-00-A)
Parent topic: 3001 - Chassis and Subframes

Remove

  1. Use Toolbox to release the rear parking brakes. See Parking Brake - Caliper - Rear - LH (Release).
  2. Raise and support the vehicle. See Raise Vehicle - 2 Post Lift.
  3. Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
  4. Remove the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace).
  5. Disconnect 12V power. See 12V Power (Disconnect and Connect).
  6. Perform the vehicle electrical isolation procedure. See Vehicle Electrical Isolation Procedure.
  7. Remove the HV cap that covers the HV harness located on the LH side of the penthouse.
  8. Remove the LH 2nd row seat side bolster. See Bolster - Side - Seat - 2nd Row - LH (Remove and Replace).
  9. Remove the LH rear sill panel trim. See Trim - Sill Panel - Rear - LH (Remove and Replace).
  10. Remove the bolts that attach the wiring harness bracket at the penthouse.
  11. Release the clips that attach the wiring harness bracket, and then remove the bracket from the vehicle.
  12. Release the clip that attaches the wiring harness to the LH lower C-pillar.
  13. Raise the handle to disconnect the electrical harness from the DC Input assembly.
  14. Remove the LH and RH rear wheels. See Wheel (Remove and Install).
  15. Remove the LH and RH wheel arch liners. See Wheel Arch Liner - Rear - LH (Remove and Replace).
  16. Raise the vehicle fully.
  17. Remove the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
  18. Drain the powertrain coolant. See Powertrain Coolant (Drain and Refill).
  19. Remove the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  20. Remove the rear fascia diffuser. See Diffuser - Rear Fascia (Remove and Replace).
  21. Disconnect the electrical connector from the LH rear brake caliper.
    LH shown, RH similar
  22. Check the LH rear upper aft link and if present, disconnect the electrical connector from the sensor.
    LH shown, RH similar
  23. If a connector was disconnected in the previous step, release the clip that attaches the connector harness to the underside of the rear subframe.
    LH shown, RH similar
  24. Remove the bolts that attach the LH rear brake caliper bracket to the knuckle, and then hang the caliper bracket on the body with an S-hook.
  25. Remove the bolt that attaches the cover to the LH lower aft link, and then remove the cover from the vehicle.
  26. Install a spring compressor onto the LH rear coil spring.
    Caution:
    Line up the hooks per image and verify that the threaded shaft goes through the body opening when the suspension is compressed.
  27. Remove the bolts that attach the LH rear damper at the top mount.
  28. Disconnect the electrical harness from the LH 12V subframe connectors.
  29. Remove the LH subframe electrical harness clip from the body.
  30. Repeat step 21 through step 29 for the RH side of the vehicle.
  31. Remove the rear HV battery skid plate. See Skid Plate - HV Battery - Rear (Remove and Replace).
  32. Release the clips that attach the RH inner HV battery return hose to the HV battery.
  33. Position the coolant drain beneath the LH rear of the HV battery.
  34. Disconnect the rear drive unit inverter inlet hose from the LH side of the HV battery, and then plug the male and female fittings.
  35. Release the barrel clip that attaches the rear drive unit inverter inlet hose to the HV battery, and separate the hose from the battery.
  36. Remove the nuts (x2) that attach the HV battery to rear drive unit harness bracket to the HV battery.
  37. Slide the release to unlock the HV electrical harness connector on the HV battery.
  38. Lift the handle on the HV electrical harness connector, disconnect the harness from the HV battery connector.
  39. Position the coolant drain beneath the RH rear of the HV battery.
  40. Release the clip, disconnect the rear drive unit outlet hose from the powertrain return hose, and then plug the male and female fittings.
  41. Remove the coolant drain container from underneath the vehicle.
  42. Release the fir tree clips that attach the coolant hoses to the LH shear plate.
  43. Remove the smaller bolts that attach the LH shear plate to the HV battery.
  44. Repeat step 42 and step 43 for the RH shear plate.
  45. Remove the nut that attaches the rear drive unit ground strap to the body.
  46. Remove the rear stabilizer bar. See Stabilizer Bar - Rear (Remove and Replace).
  47. Place the rear subframe lifting tool into position underneath the rear subframe.
  48. Attach an air hose to the rear subframe lifting tool.
  49. With an assistant, raise the rear subframe lifting tool to support the rear subframe.
  50. Loop the straps over the rear subframe, hook the ends of the straps to the metal rings, and then pull the straps tight to restrain the subframe to the rear subframe lifting tool.
    Note: Lower the vehicle to give more slack to connect the straps to the rings, if necessary.
  51. Remove and discard the bolts that attach the shear plates and rear subframe to the body.
    Note: When the front bolts are removed, the shear plates are also removed.
  52. With an assistant, slowly lower the rear subframe lifting tool to remove the rear subframe from the vehicle.
    Caution:
    Assist with the routing of HV harnesses and coolant hoses through components so that they do not "catch".
  53. Disconnect the air supply from the rear subframe lifting tool.
  54. Move the rear subframe and rear subframe lifting tool away from the vehicle.
1Use Toolbox to release the rear parking brakes. See Parking Brake - Caliper - Rear - LH (Release).
2Raise and support the vehicle. See Raise Vehicle - 2 Post Lift.
3Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
4Remove the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace).
5Disconnect 12V power. See 12V Power (Disconnect and Connect).
6Perform the vehicle electrical isolation procedure. See Vehicle Electrical Isolation Procedure.
7Remove the HV cap that covers the HV harness located on the LH side of the penthouse.
8Remove the LH 2nd row seat side bolster. See Bolster - Side - Seat - 2nd Row - LH (Remove and Replace).
9Remove the LH rear sill panel trim. See Trim - Sill Panel - Rear - LH (Remove and Replace).
10Remove the bolts that attach the wiring harness bracket at the penthouse.
11Release the clips that attach the wiring harness bracket, and then remove the bracket from the vehicle.
12Release the clip that attaches the wiring harness to the LH lower C-pillar.
13Raise the handle to disconnect the electrical harness from the DC Input assembly.
14Remove the LH and RH rear wheels. See Wheel (Remove and Install).
15Remove the LH and RH wheel arch liners. See Wheel Arch Liner - Rear - LH (Remove and Replace).
16Raise the vehicle fully.
17Remove the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
18Drain the powertrain coolant. See Powertrain Coolant (Drain and Refill).
19Remove the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
20Remove the rear fascia diffuser. See Diffuser - Rear Fascia (Remove and Replace).
LH shown, RH similar
21Disconnect the electrical connector from the LH rear brake caliper.
LH shown, RH similar
22Check the LH rear upper aft link and if present, disconnect the electrical connector from the sensor.
LH shown, RH similar
23If a connector was disconnected in the previous step, release the clip that attaches the connector harness to the underside of the rear subframe.
24Remove the bolts that attach the LH rear brake caliper bracket to the knuckle, and then hang the caliper bracket on the body with an S-hook.
25Remove the bolt that attaches the cover to the LH lower aft link, and then remove the cover from the vehicle.
26Install a spring compressor onto the LH rear coil spring.
Caution:
Line up the hooks per image and verify that the threaded shaft goes through the body opening when the suspension is compressed.
27Remove the bolts that attach the LH rear damper at the top mount.
28Disconnect the electrical harness from the LH 12V subframe connectors.
29Remove the LH subframe electrical harness clip from the body.
30Repeat step 21 through step 29 for the RH side of the vehicle.
31Remove the rear HV battery skid plate. See Skid Plate - HV Battery - Rear (Remove and Replace).
32Release the clips that attach the RH inner HV battery return hose to the HV battery.
33Position the coolant drain beneath the LH rear of the HV battery.
34Disconnect the rear drive unit inverter inlet hose from the LH side of the HV battery, and then plug the male and female fittings.
35Release the barrel clip that attaches the rear drive unit inverter inlet hose to the HV battery, and separate the hose from the battery.
36Remove the nuts (x2) that attach the HV battery to rear drive unit harness bracket to the HV battery.
37Slide the release to unlock the HV electrical harness connector on the HV battery.
38Lift the handle on the HV electrical harness connector, disconnect the harness from the HV battery connector.
39Position the coolant drain beneath the RH rear of the HV battery.
40Release the clip, disconnect the rear drive unit outlet hose from the powertrain return hose, and then plug the male and female fittings.
41Remove the coolant drain container from underneath the vehicle.
42Release the fir tree clips that attach the coolant hoses to the LH shear plate.
43Remove the smaller bolts that attach the LH shear plate to the HV battery.
44Repeat step 42 and step 43 for the RH shear plate.
45Remove the nut that attaches the rear drive unit ground strap to the body.
46Remove the rear stabilizer bar. See Stabilizer Bar - Rear (Remove and Replace).
47Place the rear subframe lifting tool into position underneath the rear subframe.
48Attach an air hose to the rear subframe lifting tool.
49With an assistant, raise the rear subframe lifting tool to support the rear subframe.
50Loop the straps over the rear subframe, hook the ends of the straps to the metal rings, and then pull the straps tight to restrain the subframe to the rear subframe lifting tool.
Note: Lower the vehicle to give more slack to connect the straps to the rings, if necessary.
51Remove and discard the bolts that attach the shear plates and rear subframe to the body.
Note: When the front bolts are removed, the shear plates are also removed.
52With an assistant, slowly lower the rear subframe lifting tool to remove the rear subframe from the vehicle.
Caution:
Assist with the routing of HV harnesses and coolant hoses through components so that they do not "catch".
53Disconnect the air supply from the rear subframe lifting tool.
54Move the rear subframe and rear subframe lifting tool away from the vehicle.

Install

  1. Position the subframe lifting tool and subframe underneath the vehicle.
  2. Connect the air line to the subframe lifting tool.
  3. With an assistant, slowly raise the rear drive unit and subframe into position.
    Caution:
    Assist with the routing of HV harnesses and coolant hoses through components so that they are not pinched or broken.
  4. Install and hand-tighten the new bolts that attach the shear plates and rear subframe to the body.
    Note: Pass the front bolts through the shear plates first, then into the rear subframe, and hand-tighten to the body.
  5. Install and hand-tighten the smaller bolts that attach the LH shear plate to the HV battery.
  6. Fasten the fir tree clips that attach the coolant hoses to the LH shear plate.
  7. Repeat step 5 and step 6 for the RH shear plate.
  8. Tighten the bolts that attach the rear subframe to the body.
    Torque Rear bolts: 165 Nm
    Torque Front bolts: 128 Nm
  9. Tighten the bolts for the shear plates.
    Torque 30 Nm
  10. Release the straps and lower the subframe lifting tool from the vehicle.
  11. Disconnect the air line from the subframe lifting tool, and then remove the tool from underneath the vehicle.
  12. Install the rear stabilizer bar. See Stabilizer Bar - Rear (Remove and Replace).
  13. Install the ground strap for the rear drive unit.
    Torque 10 Nm
    Note: Reinstall the washer if the vehicle had this washer during removal.
    Note: Make sure that the angle of the ground strap provides enough clearance between the ground strap wire and the ABS wheel speed sensor wiring harness.
  14. Position the coolant drain beneath the RH rear of the HV battery.
  15. Remove the hose plugs, connect the rear drive unit outlet hose to the powertrain return hose, and then fasten the clip.
    Caution:
    Perform a push-pull test to verify that the hose is fully seated.
  16. Fully raise the handle on the rear drive unit HV electrical harness.
  17. Attach the HV connector lever lock onto the back of the HV electrical harness.
  18. Firmly connect the HV electrical harness to the HV battery connector.
    Caution:
    Make sure that the harness fits the connector squarely and tightly.
  19. While pressing the harness to the connector, remove the HV connector lever lock.
  20. While pressing the harness to the connector, fully lower the handle.
  21. Slide the release to lock the HV electrical harness.
  22. Install the nuts (x2) that attach the rear drive unit HV electrical harness bracket to the HV battery.
    Torque 10 Nm
  23. Position the coolant drain beneath the LH rear of the HV battery.
  24. Remove the plugs from the male and female fittings, connect the rear drive unit inverter inlet hose to the LH side of the HV battery, and then fasten the clip.
    Caution:
    Perform a push-pull test to verify that the hose is fully seated.
  25. Fasten the barrel clip that attaches the rear drive unit inverter inlet hose to the HV battery.
  26. Fasten the clips that attach the RH inner HV battery return hose to the HV battery.
  27. Remove the coolant drain container from underneath the vehicle.
  28. Install the rear HV battery skid plate. See Skid Plate - HV Battery - Rear (Remove and Replace).
  29. Fasten the LH subframe electrical harness clip to the body.
  30. Connect the electrical connector for the LH of the 12V subframe harness.
    LH side shown, RH similar
  31. Install the bolts that attach the LH rear damper at the top mount.
    Torque 41 Nm
  32. Check the torque for any LH suspension bolts that were loosened while the rear subframe assembly was removed from the vehicle. See Suspension - Rear (Check Torque).
  33. Remove the spring compressor from the LH rear coil spring.
  34. Install the LH rear suspension cover onto the LH lower aft link, and then install the bolt that attaches the cover to the LH lower aft link.
    Torque 6 Nm
  35. Install the LH rear brake caliper bracket onto the knuckle, and then install the bolts that attach the caliper bracket to the knuckle.
    Torque 83 Nm
  36. If previously removed, install the clip that attaches the sensor connector harness to the underside of the rear subframe.
    LH shown, RH similar
  37. If previously removed, connect the electrical connector to the sensor near the LH rear upper aft link.
    LH shown, RH similar
  38. Connect the electrical harness to the LH rear brake caliper connector.
  39. Repeat step 29 through step 38 for the RH side of the vehicle.
  40. Install the rear fascia diffuser. See Diffuser - Rear Fascia (Remove and Replace).
  41. Install the LH and RH wheel arch liners. See Wheel Arch Liner - Rear - LH (Remove and Replace).
  42. Install the LH and RH rear wheels. See Wheel (Remove and Install).
  43. Perform the penthouse air leak test. See Penthouse Air Leak Test.
  44. Connect 12V power. See 12V Power (Disconnect and Connect).
  45. Perform a vacuum refill of the cooling system. See Cooling System (Vacuum Refill).
  46. Perform a four wheel alignment check and adjustment. See Four Wheel Alignment (Check and Adjust).
    1. Install the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
    2. Install the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
1Position the subframe lifting tool and subframe underneath the vehicle.
2Connect the air line to the subframe lifting tool.
3With an assistant, slowly raise the rear drive unit and subframe into position.
Caution:
Assist with the routing of HV harnesses and coolant hoses through components so that they are not pinched or broken.
4Install and hand-tighten the new bolts that attach the shear plates and rear subframe to the body.
Note: Pass the front bolts through the shear plates first, then into the rear subframe, and hand-tighten to the body.
5Install and hand-tighten the smaller bolts that attach the LH shear plate to the HV battery.
6Fasten the fir tree clips that attach the coolant hoses to the LH shear plate.
7Repeat step 5 and step 6 for the RH shear plate.
8Tighten the bolts that attach the rear subframe to the body.
Torque Rear bolts: 165 Nm
Torque Front bolts: 128 Nm
9Tighten the bolts for the shear plates.
Torque 30 Nm
10Release the straps and lower the subframe lifting tool from the vehicle.
11Disconnect the air line from the subframe lifting tool, and then remove the tool from underneath the vehicle.
12Install the rear stabilizer bar. See Stabilizer Bar - Rear (Remove and Replace).
13Install the ground strap for the rear drive unit.
Torque 10 Nm
Note: Reinstall the washer if the vehicle had this washer during removal.
Note: Make sure that the angle of the ground strap provides enough clearance between the ground strap wire and the ABS wheel speed sensor wiring harness.
14Position the coolant drain beneath the RH rear of the HV battery.
15Remove the hose plugs, connect the rear drive unit outlet hose to the powertrain return hose, and then fasten the clip.
Caution:
Perform a push-pull test to verify that the hose is fully seated.
16Fully raise the handle on the rear drive unit HV electrical harness.
17Attach the HV connector lever lock onto the back of the HV electrical harness.
18Firmly connect the HV electrical harness to the HV battery connector.
Caution:
Make sure that the harness fits the connector squarely and tightly.
19While pressing the harness to the connector, remove the HV connector lever lock.
20While pressing the harness to the connector, fully lower the handle.
21Slide the release to lock the HV electrical harness.
22Install the nuts (x2) that attach the rear drive unit HV electrical harness bracket to the HV battery.
Torque 10 Nm
23Position the coolant drain beneath the LH rear of the HV battery.
24Remove the plugs from the male and female fittings, connect the rear drive unit inverter inlet hose to the LH side of the HV battery, and then fasten the clip.
Caution:
Perform a push-pull test to verify that the hose is fully seated.
25Fasten the barrel clip that attaches the rear drive unit inverter inlet hose to the HV battery.
26Fasten the clips that attach the RH inner HV battery return hose to the HV battery.
27Remove the coolant drain container from underneath the vehicle.
28Install the rear HV battery skid plate. See Skid Plate - HV Battery - Rear (Remove and Replace).
29Fasten the LH subframe electrical harness clip to the body.
LH side shown, RH similar
30Connect the electrical connector for the LH of the 12V subframe harness.
31Install the bolts that attach the LH rear damper at the top mount.
Torque 41 Nm
32Check the torque for any LH suspension bolts that were loosened while the rear subframe assembly was removed from the vehicle. See Suspension - Rear (Check Torque).
33Remove the spring compressor from the LH rear coil spring.
34Install the LH rear suspension cover onto the LH lower aft link, and then install the bolt that attaches the cover to the LH lower aft link.
Torque 6 Nm
35Install the LH rear brake caliper bracket onto the knuckle, and then install the bolts that attach the caliper bracket to the knuckle.
Torque 83 Nm
LH shown, RH similar
36If previously removed, install the clip that attaches the sensor connector harness to the underside of the rear subframe.
LH shown, RH similar
37If previously removed, connect the electrical connector to the sensor near the LH rear upper aft link.
38Connect the electrical harness to the LH rear brake caliper connector.
39Repeat step 29 through step 38 for the RH side of the vehicle.
40Install the rear fascia diffuser. See Diffuser - Rear Fascia (Remove and Replace).
41Install the LH and RH wheel arch liners. See Wheel Arch Liner - Rear - LH (Remove and Replace).
42Install the LH and RH rear wheels. See Wheel (Remove and Install).
43Perform the penthouse air leak test. See Penthouse Air Leak Test.
44Connect 12V power. See 12V Power (Disconnect and Connect).
45Perform a vacuum refill of the cooling system. See Cooling System (Vacuum Refill).
46Perform a four wheel alignment check and adjustment. See Four Wheel Alignment (Check and Adjust).
  1. Install the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  2. Install the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).