HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–1
Page 2E–1
Section 2E
HVAC Occupant Climate Control (Auto A/C)
– Removal and Installation
ATTENTION
Before performing any Service Operation or other procedure described in this Section, refer to Section 00
Warnings, Cautions and Notes for correct workshop practices with regard to safety and/or property damage.
1 General Information ...............................................................................................................................2
1.1 RHD Vehicle Builds from Tag Nos. L174938 (single zone) and L173857 (dual zone) Onwards...................... 2
1.2 RHD Vehicle Builds Prior to Tag Nos. L174938 (single zone) and L173857 (dual zone) .................................. 3
1.3 LHD Vehicles.......................................................................................................................................................... 4
2 Service Operations.................................................................................................................................5
2.1 Vacuum Solenoid Pack ......................................................................................................................................... 6
Remove – RHD....................................................................................................................................................... 6
Install – RHD........................................................................................................................................................... 6
2.2 Air Mix Door Motor................................................................................................................................................. 7
Remove – RHD (Single Zone)................................................................................................................................ 7
Install – RHD (Single Zone)................................................................................................................................... 7
Remove and Install – RHD (Dual Zone)................................................................................................................7
3 Torque Wrench Specifications..............................................................................................................8
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HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–2
Page 2E–2
1 General Information
With the following exceptions, MY 2004 VY and V2 Series HVAC Occupant Climate Control (Auto A/C) – Removal and
Installation information carries over from MY 2003 VY and V2 Series vehicles.
• From Tag Nos. L174938 (single zon e) and L173857 (dual zone) revised HVAC units have been fitted to RHD
vehicles.
1.1 RHD Vehicle Builds from Tag Nos.
L174938 (single zone) and L173857 (dual
zone) Onwards
From Tag Nos. L174938 (single zon e) and L173857 (dual zone) revised HVAC units have been fitted to RHD vehicles.
The information in this Section applies to the revised HVAC units.
For all other information regarding the remov al an d installation of the heating and ventilation system, refer to
Section 2E HVAC Occupant Climate Control (Auto A/C) – Removal and Installation in the MY 2003 VY and V2 Series
Service Information.
HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–3
Page 2E–3
1.2 RHD Vehicle Builds Prior to Tag Nos.
L174938 (single zone) and L173857 (dual
zone)
For all information regarding the removal and installation of the heating and ventil ation system fitted to
RHD vehicles built prior to T ag Nos. L1749 38 (single zone) and L173857 (dual zone), refer to
Section 2E HVAC Occupant Climate Control (Auto A/C) – Removal and Installation in the MY 2003 VY and V2 Series
Service Information.
HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–4
Page 2E–4
1.3 LHD Vehicles
For all information regarding the removal and installation of the heating and ventilation system fitted to LHD vehicles,
refer to Section 2E HVAC Occupant Climate Control (Auto A/C) – Removal and Installation in the MY 2003 VY and V2
Series Service Information.
HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–5
Page 2E–5
2 Service Operations
ATTENTION
All fasteners are important attaching parts as they affect the performance of vital components and / or could
result in major repair expense. W here specified in this Section, fasteners MUST be replaced w ith parts of the
same part number or a GM approved equivalent. Do not use fasteners of an inferior quality or substitute
design.
Torque values must be used as specified during reassembly to ensure proper retention of all components.
Throughout this Section, fastener torque wrench specifications may be accompanied with the following
identification marks:
Fasteners must be repl aced after loosening.
Vehicle must be at kerb height before final tightening.
Fasteners either ha ve micro encapsulated sealant ap plied or in corporate a mech anical thread lock and
should only be re-used once. If in doubt, replacement is recommended.
If one of these identification marks is present alongside a fastener torque wrench specification, the
recommendation regarding that fastener must be adhered to.
HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–6
Page 2E–6
2.1 Vacuum Solenoid Pack
LT Section – 08-150
Remove – RHD
1 Remove the left-hand side instrument panel lower trim
plate assembly, refer to Section 1A3, 3.1 Instrument
Panel Lower Trim Plate Assembly in the MY 2003 VY
and V2 Series Service Information.
2 Disconnect the wiring harness connector (1) from the
solenoid pack (2).
3 Remove the three vacuum lines (two black, one b lue)
from the retaining clips in the HVAC unit (3) at the
left-hand end of the solenoid pack.
4 Remove the two screws (4) securing the solenoid pack
to the lugs (5) on the HVAC unit case and move the
pack away from the case.
5 Disconnect the vacuum manifold (6) from the solenoid
pack and remove the pack.
Figure 2E – 1
Install – RHD
Installation of the solenoid pack is a reversal of removal procedures, noting the following:
1 Tighten all screws to the specified torque.
Vacuum solenoid pack attaching
screw torque specification...........................1.0 – 3.0 Nm
HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–7
Page 2E–7
2.2 Air Mix Door Motor
LT Section – 08-150
Remove – RHD (Single Zone)
1 Remove the HVAC unit, refer to Section 2B,
3 Heating, Ventilation and Air Conditioning (HVAC)
Unit in the MY 2003 VY and V2 Series Service
Information.
2 From the underside of the HVAC unit (1), locate the air
mix door motor (2) and disconnect the OCC wiring
harness connector (3) from the motor.
3 Remove the three screws (4) securing the ai r mix door
motor to the HVAC unit and remove the motor.
NOTE
For service and diagnosis of the air mix door
motor, refer to Section 2F 3 HVAC Occupant
Climate Control (Auto A/C) – Diagnostics in the
MY 2003 VY and V2 Series Service Information.
Figure 2E – 2
Install – RHD (Single Zone)
Installation of the air mix door motor is a reversal of removal procedures, noting the following:
1 Tighten all screws to the specified torque.
Air mix door motor attaching
screw torque specification...........................1.0 – 3.0 Nm
NOTE
If the air mix door motor has been replaced, the
motor/door function must be calibrated to the
OCC control module. Failure to do so may result
in poor HVAC system performance and lead to
customer complaints. Refer to Section 2F,
F5: Program in the MY 2003 VY and V2 Series
Service Information.
Remove and Install – RHD (Dual Zone)
For removal and installation of the air mix door motors for right-hand drive dual zone s ystems refer to
Section 2E, 2.10 Air Mix Motor in the MY 2003 VY and V2 Series Service Information.
NOTE
If an air mix door motor has been replaced, the
motor/door function must be calibrated to the
OCC control module. Failure to do so may result
in poor HVAC system performance and lead to
customer complaints. Refer to Section 2F,
F5: Program in the MY 2003 VY and V2 Series
Service Information.
HVAC Occupant Climate Control (Auto A/C) – Removal and Installation Page 2E–8
Page 2E–8
3 Torque Wrench Specifications
Vacuum solenoid Pack Attaching Screw.......................................1.0 – 3.0 Nm
Air Mix Door Motor Attaching Screw..............................................1.0 – 3.0 Nm