03/06/2024 17:05:14
Subframe Assembly - Rear (Remove and Install)
Code de correction 30010201
- 2023-06-21: Updated note for replacement of seized rear drive unit HV harness.
Remarque
Loosen suspension fasteners by hand, then use a cordless electric drill with a 3/8 in drive adapter and a 3/8 in drive air ratchet wrench.
Avertissement
Seuls les techniciens qui ont été sensibilisés aux dangers de la haute tension et qui ont complété toutes les formations de certification requises (le cas échéant) sont autorisés à effectuer cette procédure. Portez toujours un équipement de protection personnelle et des gants isolants haute tension ayant un classement minimal de 0 (1000 volts) avant de manipuler un câble à haute tension. Se référer à la note technique TN-15-92-003, « Mises en garde relatives à la haute tension » pour obtenir des renseignements supplémentaires sur la sécurité.
Avertissement
Si le véhicule est doté de la suspension pneumatique, activez le mode « Jack » (Cric) sur l'écran tactile avant de soulever le véhicule, puis installez des chandelles.
Avertissement
Si vous débranchez l'alimentation 12 volts, n'essayez pas d’ouvrir une des portes dont la vitre est fermée. Le non-respect de cette instruction peut faire éclater la vitre de la porte.
Remarque
Avant de débrancher l'alimentation 12 volts, assurez-vous que la vitre de la porte du conducteur est complètement ouverte. Le non-respect de cette instruction peut entraîner le verrouillage de l'utilisateur hors du véhicule.
Small RDU
Remove
-
Préparez le véhicule pour le soulever :
- Véhicules dotés de la suspension pneumatique uniquement : Mettez le véhicule en mode Cric automobile.
- Mettez le véhicule en mode remorquage.
- Supportez le véhicule, mais ne le soulevez pas tout de suite.
- Disconnect 12V power. See Disconnect 12V Power.
- Perform a vehicle HV disablement check. See Procédure de désactivation HT du véhicule.
- Remove the rear wheels. See Ensemble de roue (retrait et installation).
- Raise the vehicle to working height.
-
On both sides of the vehicle, remove the nut that secures the shock absorber to the knuckle (torque 140 Nm), but do not remove the bolt yet.
-
On both sides of the vehicle, loosen the bolts (x2) that secure the brake caliper to the knuckle (torque 120 Nm). Remove and support the calipers.
ATTENTIONPour éviter d'endommager la conduite de frein, l'étrier de frein doit être supporté en tout temps.
-
Release the red locking tabs, and then disconnect the electrical harnesses from the LH and RH parking brake connectors.
- Remove the mid aero shield (voir la procédure).
-
Remove the subframe shear plates by removing the nut (torque 35 Nm), clips (x2), and screws (x3) (torque 6 Nm) that secure each shear plate to the subframe.
-
If equipped, remove the screws (x2) that secure the rear skid plate to the subframe (torque 10 Nm).
-
Disconnect the subframe harnesses from the body harness.
- Vehicles built through September 2014: 4 connectors at the back of the rear subframe
- Vehicles built after September 2014: 3 connectors above the RH side of the rear undershield
- On the RH side of the drive unit, disconnect the logic connector.
- Remove and discard the 4 screws that retain the HV cables (torque 7 Nm). Move the cables away from the drive unit.
- On the top RH side of the drive unit, release the ground strap from the drive unit (torque 6.5 Nm).
-
Release the clips that secure the HV cables:
-
Remove the coolant hoses from the LH and RH sides of the drive unit.
- If the drive unit is being removed, drain the gearbox fluid. See Liquide de la boîte d’engrenages - petites unités d’entraînement arrière (vidange et remplissage).
- Position the powertrain table with subframe fixture beneath the vehicle subframe.
- Connect shop air to the powertrain table.
- Carefully raise the powertrain table to support the rear subframe, aligning the subframe fixture dowels with the holes at the front of the subframe.
- Use a paint pen to trace around each subframe mounting bolt, so that the bolts can be realigned later during the subframe installation.
-
Use a paint pen to apply witness marks where the front/rear subframe contacts the body at each subframe mounting bolt, so that the subframe can be realigned to the body later during subframe installation.
RemarqueApply the witness marks at 90 degrees so that they indicate left/right and fore/aft movement.
-
Remove the bolts (x4) that secure the rear subframe to the body (torque 140 Nm).
-
Carefully lower the powertrain table approximately 3 in (75 mm) to gain access to the remaining attachments.
ATTENTIONWhile lowering the table, occasionally stop to make sure no hoses, harnesses, or other components are caught or tangled. Also pay extra attention to the HV battery aero shield mounting tabs.
-
Carefully lower the powertrain table.
ATTENTIONWhile raising the vehicle, have an assistant monitor the underside of the vehicle. Ensure that no components are still connected and that there is sufficient clearance so that no components are damaged.
- Move the powertrain table with subframe away from the vehicle.
Install
-
Pull on the inner halfshaft cup to confirm that the LH and RH rear drive unit halfshafts are fully seated on the rear drive unit, and that the circlip is locked into place.
RemarqueIf the halfshaft detaches from the rear drive unit, then reinstall the halfshaft paying attention to the following:
- Take care not to damage or displace the oil seals.
- Make sure that the opening of the snap rings are facing towards the bottom of the drive unit.
- Carefully push the halfshaft into the drive unit until there is an audible "click" from the halfshaft stub contacting the pinion shaft.
- There will be a slight pulling sensation on the halfshaft as the halfshaft circlip locks into place.
- Pull on the inner halfshaft cup to confirm that the circlip is locked into place.
- Move the powertrain table with subframe to under the vehicle.
-
Carefully raise the powertrain table.
ATTENTIONWhile raising the table, have an assistant monitor the underside of the vehicle. Make sure that there is sufficient clearance so that no components are damaged.
-
Carefully raise the powertrain table so that the rear subframe is up against the body.
ATTENTIONWhile raising the table, occasionally stop to make sure no hoses, harnesses, or other components are caught or crushed. Also pay extra attention to the HV battery aero shield mounting tabs.
-
Install and hand-tighten the bolts (x4) that secure the rear subframe to the body (torque 140 Nm).
-
Use a crowbar to shimmy the rear subframe with respect to the body, so that the subframe mounting bolts are centered in the tracings, and the witness marks where the subframe contacts the body align.
RemarqueIt might be necessary to align one corner and tighten the bolt, align the opposite corner and tighten the bolt, and so on in a criss-cross pattern.
- Torque the bolts (x4) that secure the rear subframe to the body (torque 140 Nm).
- Lower the powertrain table and move it out from under the vehicle.
- If the drive unit was removed, refill the gearbox fluid. See Liquide de la boîte d’engrenages - petites unités d’entraînement arrière (vidange et remplissage).
-
Install the coolant hoses to the LH and RH sides of the drive unit.
-
Fasten the clips that secure the HV cables:
-
Perform the following substeps on the drive unit:
- Install new O-rings (1003784-00-A or later) on the drive inverter cover and apply Silicone Lubricant (1010251-00-A) on both before installing the cover. Insert the cover at an angle to prevent damage to the O-rings. Once the left (B+) O-ring is seated, rotate the cover into position.
-
Connect the subframe harnesses to the body harness.
- Vehicles built through September 2014: 4 connectors at the back of the rear subframe
- Vehicles built after September 2014: 3 connectors above the RH side of the rear undershield
-
If equipped, install the rear skid plate to the rear subframe, and then install the screws (x2) that secure the skid plate to the subframe (torque 10 Nm).
-
Install the subframe shear plates to the subframe, fasten the clips (x2), and then install the nut (torque 35 Nm) and screws (x3) (torque 6 Nm) that secure each shear plate to the subframe.
- Install the mid aero shield (voir la procédure).
-
Connect the electrical harnesses to the LH and RH parking brake connectors and then fasten the red locking tabs to secure the connectors.
- Install the plastic park brake connector covers.
-
On both sides of the vehicle, install the rear brake calipers to the rear knuckles, and then install the bolts (x2) that secure each caliper to each knuckle (torque 120 Nm).
ATTENTIONPour éviter d'endommager la conduite de frein, l'étrier de frein doit être supporté en tout temps.
-
On both sides of the vehicle, install and hand-tighten the nut that secures the rear shock absorber to the rear knuckle.
- Remove the bolt that attaches the LH rear brake rotor to the hub.
- Install the hub jack adapter onto the LH rear hub and hand-tighten the lug nuts.
- Use an underhoist stand to support the hub jack adapter.
- Measure the distance between the bottom of the quarter panel and the center of the rear axle to make sure that the rear suspension is set to ride height.
- Tighten the bolt and nut that attach the LH rear shock absorber to the LH rear knuckle (torque 140 Nm), and then mark the bolt and nut with a paint pen.
- Remove the underhoist stand from underneath the LH rear suspension.
- Remove the lug nuts that attach the hub jack adapter, and then remove the hub jack adapter from the hub.
- Install the bolt that attaches the LH rear brake rotor to the hub.
- Repeat step x through y for the RH side of the vehicle.
- Install the rear wheels. See Ensemble de roue (retrait et installation).
- Connect 12V power. See Disconnect 12V Power.
-
Perform a coolant air purge and top off the coolant.
- Remove the vehicle from the 2-post lift.
- Reportez-vous aux tableaux des exigences d’alignement pour déterminer si une vérification du parallélisme EPAS ou une vérification du parallélisme des quatre roues doit être effectuée. Si effectué, ajoutez la vérification/ajustement d'alignement en tant qu'activité séparée. Voir Exigences de réglage de la géométrie - Suspension.
Large RDU
Remove
-
Préparez le véhicule pour le soulever :
- Véhicules dotés de la suspension pneumatique uniquement : Mettez le véhicule en mode Cric automobile.
- Mettez le véhicule en mode remorquage.
- Supportez le véhicule, mais ne le soulevez pas tout de suite.
- Disconnect 12V power. See Disconnect 12V Power.
-
Verify correct operation of
the multimeter.
RemarqueSet multimeter to DC voltage. Confirm multimeter is properly measuring voltage by testing the 12v battery.
- Remove the rear wheels. See Ensemble de roue (retrait et installation).
- Raise the vehicle to working height.
-
On both sides of the vehicle, remove the nut that secures the shock absorber to the knuckle (torque 140 Nm), but do not remove the bolt yet.
-
On both sides of the vehicle, loosen the bolts (x2) that secure the brake caliper to the knuckle (torque 120 Nm). Remove and support the calipers.
ATTENTIONPour éviter d'endommager la conduite de frein, l'étrier de frein doit être supporté en tout temps.
-
Release the red locking tabs, and then disconnect the electrical harnesses from the LH and RH parking brake connectors.
-
Remove the LH and RH subframe
shear plates by removing the nut (torque 35 Nm), clips (x2), and screws (x3)
(torque 6 Nm) that attach each shear plate to the subframe.
- Remove the mid aero shield panel. See Panneau - bouclier aérodynamique - central (retirer et remplacer).
-
On both sides of the vehicle,
remove the nuts (x3) that attach the mid aeroshield reinforcement.
RemarqueNuts 10mm, torque 6 Nm.
-
If equipped, remove the screws (x2) that secure the rear skid plate to the subframe (torque 10 Nm).
-
Disconnect the subframe harnesses from the body harness.
- Vehicles built through September 2014: 4 connectors at the back of the rear subframe
- Vehicles built after September 2014: 3 connectors above the RH side of the rear undershield
- Perform a vehicle HV disabelement check at the rear drive unit inverter. See Vérifiez la HT au niveau de l'onduleur de l'entraînement (grand RDU uniquement).
- Remove and discard the 2 fasteners that secure the HV cables to the drive unit (torque 9 Nm). Do not remove the cables at this time.
-
Release the clips that secure the HV cables:
-
Remove the coolant hose from the LH and RH sides of the drive unit.
- Use a paint pen to trace around each subframe mounting bolt, so that the bolts can be realigned later during installation of the subframe.
- Position the powertrain table with subframe fixture beneath the vehicle subframe.
- If the drive unit is being removed, drain the gearbox fluid. See Liquide de la boîte d’engrenages arrière – grosse unité d’entraînement (vidange et remplacement).
- Connect shop air to the powertrain table.
- Carefully raise the powertrain table to support the rear subframe, aligning the subframe fixture dowels with the holes at the front of the subframe.
-
Use a paint pen to apply witness marks where the front/rear subframe contacts the body at each subframe mounting bolt, so that the subframe can be realigned to the body later during subframe installation.
RemarqueApply the witness marks at 90 degrees so that they indicate left/right and fore/aft movement.
-
Remove the bolts (x4) that
attach the rear subframe to the body (torque 140 Nm).
-
Carefully lower the powertrain table approximately 3 in (75 mm) to gain access to the remaining attachments.
ATTENTIONWhile lowering the table, occasionally stop to make sure no hoses, harnesses, or other components are caught or tangled. Also pay extra attention to the HV battery aero shield mounting tabs.
-
Release the remaining attachments to the drive unit:
-
Carefully lower the powertrain table.
ATTENTIONWhile raising the vehicle, have an assistant monitor the underside of the vehicle. Ensure that no components are still connected and that there is sufficient clearance so that no components are damaged.
- Move the powertrain table with subframe away from the vehicle.
Install
-
Pull on the inner halfshaft cup to confirm that the LH and RH rear drive unit halfshafts are fully seated on the rear drive unit, and that the circlip is locked into place.
RemarqueIf the halfshaft detaches from the rear drive unit, then reinstall the halfshaft paying attention to the following:
- Take care not to damage or displace the oil seals.
- Make sure that the opening of the snap rings are facing towards the bottom of the drive unit.
- Carefully push the halfshaft into the drive unit until there is an audible "click" from the halfshaft stub contacting the pinion shaft.
- There will be a slight pulling sensation on the halfshaft as the halfshaft circlip locks into place.
- Pull on the inner halfshaft cup to confirm that the circlip is locked into place.
-
Drive Units built before October 2014 only: Make sure that no harnesses or cable ties press into the acoustic padding upon reinstallation. Refer to TN-14-40-002, Noise Path for Motor Hum, for more information.
- Move the powertrain table with subframe to under the vehicle.
-
Carefully raise the powertrain table.
ATTENTIONWhile raising the table, have an assistant monitor the underside of the vehicle. Make sure that there is sufficient clearance so that no components are damaged.
-
Install the remaining attachments to the drive unit:
-
Carefully raise the powertrain table so that the rear subframe is up against the body.
ATTENTIONWhile raising the table, occasionally stop to make sure no hoses, harnesses, or other components are caught or crushed. Also pay extra attention to the HV battery aero shield mounting tabs.
-
Install and hand-tighten the bolts (x4) that secure the rear subframe to the body (torque 140 Nm).
-
Use a crowbar to shimmy the rear subframe with respect to the body, so that the subframe mounting bolts are centered in the tracings, and the witness marks where the subframe contacts the body align.
RemarqueIt might be necessary to align one corner and tighten the bolt, align the opposite corner and tighten the bolt, and so on in a criss-cross pattern.
- Torque the bolts (x4) that secure the rear subframe to the body (torque 140 Nm).
- Lower the powertrain table and move it out from under the vehicle.
- If the drive unit was removed, refill the gearbox fluid. See Liquide de la boîte d’engrenages arrière – grosse unité d’entraînement (vidange et remplacement).
-
Install the coolant hoses to the LH and RH sides of the drive unit.
-
Fasten the clips that secure the HV cables:
- Install 2 new fasteners to secure the HV cables in the rear drive unit (torque 9 Nm).
- Install new O-rings (1003784-00-A or later) on the drive inverter cover and apply Silicone Lubricant (1010251-00-A) on both before installing the cover. Insert the cover at an angle to prevent damage to the O-rings. Once the left (B+) O-ring is seated, rotate the cover into position.
-
Connect the subframe harnesses to the body harness.
- Vehicles built through September 2014: 4 connectors at the back of the rear subframe
- Vehicles built after September 2014: 3 connectors above the RH side of the rear undershield
-
If equipped, install the rear skid plate to the rear subframe, and then install the screws (x2) that secure the skid plate to the subframe (torque 10 Nm).
-
Install the subframe shear plates to the subframe, fasten the clips (x2), and then install the nut (torque 35 Nm) and screws (x3) (torque 6 Nm) that secure each shear plate to the subframe.
-
On both sides of the vehicle,
install the nuts (x3) that attach the mid aeroshield reinforcement.
RemarqueNuts 10mm, torque 6 Nm.
- Install the mid aero shield. See Panneau - bouclier aérodynamique - central (retirer et remplacer).
-
Connect the electrical harnesses to the LH and RH parking brake connectors and then fasten the red locking tabs to secure the connectors.
- Install the plastic park brake connector covers.
-
On both sides of the vehicle, install the rear brake calipers to the rear knuckles, and then install the bolts (x2) that secure each caliper to each knuckle (torque 120 Nm).
ATTENTIONPour éviter d'endommager la conduite de frein, l'étrier de frein doit être supporté en tout temps.
-
On both sides of the vehicle, install and hand-tighten the nut that secures the rear shock absorber to the rear knuckle.
- Remove the bolt that attaches the LH rear brake rotor to the hub.
-
Install the hub jack adapter onto the LH rear hub and hand-tighten the lug nuts.
-
Use an underhoist stand to support the hub jack adapter.
-
Measure the distance between
the top of the upper fore link to the bolt on the frame rail to make sure that
the rear suspension is set to ride height.
RemarqueDistance should be 85 mm +/- 5 mm.
- Tighten the bolt and nut that attach the LH rear shock absorber to the LH rear knuckle (torque 140 Nm), and then mark the bolt and nut with a paint pen.
- Remove the underhoist stand from underneath the LH rear suspension.
- Remove the lug nuts that attach the hub jack adapter, and then remove the hub jack adapter from the hub.
- Install the bolt that attaches the LH rear brake rotor to the hub.
- Repeat step 25 through 32 for the RH side of the vehicle.
- Install the rear wheels. See Ensemble de roue (retrait et installation).
- Connect 12V power. See Disconnect 12V Power.
-
Perform a coolant air purge
and top off the coolant.
- Remove the vehicle from the 2-post lift.
- Reportez-vous aux tableaux des exigences d’alignement pour déterminer si une vérification du parallélisme EPAS ou une vérification du parallélisme des quatre roues doit être effectuée. Si effectué, ajoutez la vérification/ajustement d'alignement en tant qu'activité séparée. Voir Exigences de réglage de la géométrie - Suspension.