HVAC Occupant Climate Control (Auto A/C) – Description and Operation Page 2D–1

Page 2D–1

Section 2D

HVAC Occupant Climate Control (Auto A/C)

– Description and Operation

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

2 Description ............................................................................................................................................. 3

2.1 Occupant Climate Control Module........................................................................................................................3

3 Specifications......................................................................................................................................... 4

Techline

HVAC Occupant Climate Control (Auto A/C) – Description and Operation Page 2D–2

Page 2D–2

1 General Information

Single zone HVAC Occupant Climate Control (Auto A/C) is fitted as optional equipment as part of the leather interior

package on MY 2004 AWD Crew Cab vehicles. This system is combined with a high power engine cooling fan system

(430 W) identical to that used on the previously released MY 2003 VY Series Regular Cab vehicles fitted with GEN III V8

engines. The engine cooling fan operating strategy is also the same.

For information relating to the description and operation of major components such as the condenser, filter drier receiver,

compressor, evaporator, heater core, blower fan, cooling fans and water valve, which are common to both manual A/C

and OCC (Auto A/C) air conditioning systems, refer to Section 2A HVAC Climate Control (Manual A/C) – Description and

Operation in the MY 2003 VY and V2 Series Service Information.

For further information relating specifically to the description and operation of the Occupant Climate Control (Auto A/C),

refer to Section 2D HVAC Occupant Climate Control (Auto A/C) – Description and Operation in the MY 2003 VY and

V2 Series Service Information.

For information relating to the engine cooling fan system, refer to Section 6B3 Engine Cooling in the MY 2003 VY

Regular Cab Service Information.

HVAC Occupant Climate Control (Auto A/C) – Description and Operation Page 2D–3

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2 Description

2.1 Occupant Climate Control Module

The single zone OCC control module is carried over from the MY 2004 VY Series and is as shown in Figure 2D – 1. The

passenger side of the OCC control module is fitted with a MIN (Cold) / MAX (Hot) Uncontrolled Temperature Setting

switch (1). The driver’s side is fitted with a Set Temperature switch (2).

Figure 2D – 1

For further information relating specifically to the configurations and components of the OCC control module, refer to

Section 2D, 3.1 OCC Control Module in the MY 2003 VY and V2 Series Service Information.

All OCC control modules fitted to the MY 2004 AWD Crew Cab vehicle display an additional driving condition icon to the

driver in the form of a snowflake. This is the same feature previously released for the MY 2004 AWD W agon vehicle

range. This ‘Ice Warning’ symbol (1) will be displayed on the LCD screen (2) when the outside temperature is

approximately 2 °C or below. It is provided to alert the driver that the road surface may be hazardous. The symbol will

turn off when the outside temperature rises above 4 °C. The outside temperature information is relayed to the OCC

control module by the ambient temperature sensor.

Figure 2D – 2

For further information relating to all other graphics and icons displayed by the OCC control module LCD screen, refer to

Section 2D, 3.1 OCC Control Module in the MY 2003 VY and V2 Series Service Information.

For further information relating to the operation of the OCC control module, refer to Section 2D, 4 Operation in the

MY 2003 VY and V2 Series Service Information.

HVAC Occupant Climate Control (Auto A/C) – Description and Operation Page 2D–4

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3 Specifications

For all specifications (excluding engine cooling fan and blower fan specifications) relating to the HVAC Occupant Climate

Control (Auto A/C) as fitted to MY 2004 AWD Crew Cab vehicles, refer to Section 2D, 5 Specifications in the MY 2003

VY and V2 Series Service Information noting that specifications listed for LHD vehicles do not apply.

For specifications relating to engine cooling fans, refer to the GEN III V8 cooling fan specifications in Section 2A,

3 Specifications in the MY 2003 VY Series Regular Cab Service Information.

For specifications relating to the blower fan, refer to the blower fan specifications in Section 2D, 5 Specifications in the

MY 2003 VY and V2 Series Service Information.