25/05/2022 09:09:45
HVAC Assembly (Remove and Replace)
Correction Code 18101002
Removal
- Position the vehicle so that both front doors can be fully opened.
- Move the driver's seat fully rearwards.
- Move the passenger's seat fully rearwards.
- Move the steering column to the lowest position, and fully extended.
- Open the glove box.
- Recover refrigerant from the vehicle (refer to procedure).
- Perform the vehicle HV disablement procedure (refer to procedure).
- Remove the cross car beam (refer to procedure).
- Remove the RH shock tower brace (refer to procedure).
-
Vehicles with air suspension only:
-
Remove the bolt that secures the A/C pipe to the bulkhead TXV valve (torque 22
Nm).
- Remove and discard the O-rings.
- Disconnect the TXV harness connector.
-
Remove the screws (x2) that secure the bulkhead TXV valve to the HVAC assembly
(torque 6 Nm).
-
Remove and discard the O-ring.
CAUTIONLubricate new O-rings with clean refrigerant oil.
-
Working from above, disconnect the PTC heater harness from the DCDC converter or
forward junction box.
NoteComponents have been removed in this graphic to aid clarity.
1 HV Battery heater harness 2 DCDC converter harness 3 Compressor harness 4 PTC heater harness -
Attach string or wire to the PTC heater harness connector.
NoteThe string/wire will make it easier to re-install the PTC heater later.
- Release the PTC heater harness from the HVAC retaining clip.
- With assistance, carefully release the PTC heater harness from the bulkhead and carefully pull it into the vehicle through the footwell.
-
Remove the string/wire from the PTC heater harness.
NoteDo not withdraw the string/wire from the bulkhead.
- Disconnect the electrical connectors from the HVAC assembly.
- LHD vehicles only: Remove the body controller (BCM) (refer to procedure).
-
Remove the bolts (x7) that secure the HVAC assembly to the bulkhead (torque 6
Nm).
- Disconnect the HVAC drain tube.
-
Carefully remove the HVAC assembly.
CAUTIONPlug pipe connections to prevent ingress of moisture or dirt.
Installation
Installation procedure is the reverse of removal, except for the following:
CAUTION
Lubricate new O-rings with clean
refrigerant oil.
CAUTION
When reinstalling the cross car beam,
ensure that the wiring harness is not pinched between the beam and the PTC
heater.
- Secure the string/wire to the PTC heater harness. With assistance, carefully pull the harness through the bulkhead. Ensure that the surrounding components are not compromised. Use a cable tie and a clip harness to avoid rubbing.
- Reinstall the latest vehicle firmware, or update the firmware if not the latest. See Firmware Reinstall - Touchscreen or Firmware Update.