HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–1

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Section 2F

HVAC Occupant Climate Control (Auto A/C)

– Diagnostics

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 Diagnostics.............................................................................................................................................5

3 Wiring Diagrams.....................................................................................................................................6

Connectors A13 – M3 ............................................................................................................................................ 8

Connectors M7 – X119........................................................................................................................................... 9

Connectors X126 – Y37 ....................................................................................................................................... 10

Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – V6 (LHD)........................................ 11

Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – V6 (RHD)....................................... 12

Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – SCV6 (RHD) .................................. 13

Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – Gen III V8 (LHD)............................ 14

Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – Gen III V8 (RHD) ........................... 15

Techline

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–2

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1 General Information

With the following exceptions, MY 2004 VY and V2 Series HVAC Occupant Climate Control (Auto A/C) – Diagnostics

information carries over from MY 2003 VY and V2 Series vehicl es.

• From Tag Nos. L174938 (single zone) and L173857 (dua l zone) revised HVAC units have been fitted to RHD

vehicles.

• There are minor differences in wiring – refer to 3 Wiring Diagrams.

1.1 RHD Vehicle Builds from Tag Nos.

L174938 (single zone) and L173857 (dual

zone) Onwards

From Tag Nos. L174938 (single zone) 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 diagn osis of the heating and ventilation system, refer to

Section 2F HVAC Occupant Climate Control (Auto A/C) – Diag nostics in the MY 2003 VY and V2 Serie s Service

Information.

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–3

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1.2 RHD Vehicle Builds Prior to Tag Nos.

L174938 (single zone) and L173857 (dual

zone)

For all information regarding diagnosis of the heating and ventilation system fitted to RHD vehicles built prior to Tag Nos.

L174938 (single zone) and L173857 (dual zone), other than electrical connector and wiring diagram information, refer to

Section 2F HVAC Occupant Climate Control (Auto A/C) – Diag nostics in the MY 2003 VY and V2 Serie s Service

Information.

For electrical connector and wiring diagram information for all RHD vehicles, irrespective of tag number, refer to

3 Wiring Diagrams in this section.

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–4

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1.3 LHD Vehicles

For all information regarding d iagnosis of the heating and ventilation s ystem fitted to LHD vehicles, refer to

Section 2F HVAC Occupant Climate Control (Auto A/C) – Diag nostics in the MY 2003 VY and V2 Serie s Service

Information.

For electrical connector and wiring diagram information for all LHD vehicles, refer to 3 Wiring Diagrams in this section.

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–5

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2 Diagnostics

The diagnostic information acc ess procedures are a

carry over from the MY 2003 VY and V2 Series except

that the Model Year selection on TECH 2 is now

(4) 2004.

Figure 2F – 1

The Vehicle Type selection is VY Series.

Figure 2F – 2

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–6

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3 Wiring Diagrams

The following figures provide electrical connector and wiring diagrams applicabl e to HVAC Occupant Climate

Control (Auto A/C) systems fitted to MY 2004 VY and V2 Series vehicles. When diagnosing circuit faults, these

diagrams should be used in conjunction with the diagnostic chart circuit diagrams provi ded in

Section 2F HVAC Occupant Climate Control (Auto A/C) – Diagnostics in the MY 2003 VY and V2 Series Service

Information. The content of these figures is as follows:

• Electrical connectors (A13 – M3) – refer to Figure 2F – 3

• Electrical connectors continued (M7 – X119) – refer to Figure 2F – 4

• Electrical connectors continued (X126 – Y37) – refer to Figure 2F – 5

• Wiring diagrams – refer to Figure 2F – 6 to Figure 2F – 10 inclusive

NOTE

For RHD vehicles built prior to Tag Nos. L1749 38

(single zone) and L173857 (dual zone), the

blower motor was fitted with a built-in circuit

breaker for motor protection. The revised HVAC

units fitted to RHD vehicles from Tag Nos.

L174938 (single zone) and L173857 (dual zone)

onwards use an e xternal bl ad e t ype fuse i n l ieu of

the built-in circuit breaker. For blower wiring

information only, for the built-in circuit breaker

type motor, refer to Section 2F, 5 Wiring

Diagrams in the MY 2003 VY and V2 Series

Service Information.

In the following wiring diagrams (Figure 2F – 6 to Figure 2F – 10 inclusive) all components are descri bed and displayed

in accordance with the Integrated Vehicle Electrical Design (IVED) standard as applied to MY 2004 VY and V2 Series

vehicles. To assist in wiring diagram interpretation, refer to the following table:

IVED Description IVED Component

Identification Common Description

Module Asm Blo & Air Inl A13 Blower Motor Resistor

Module Asm Blo Mot & A/C Cmpr Cont A14 OCC Control Module

Module Asm Body Cont A15 Body Control Module

Module Asm Pwrt Cont A84_SCV6 SCV6 Powertrain Control Module

Module Asm Pwrt Cont A84_V6 V6 Powertrain Control Module

Module Asm Pwrt Cont A84_V8 GEN III V8 Powertrain Control Module

Sensor Asm A/C Refrig Press B18 A/C Pressure Transducer

Sensor Asm Amb Air Temp B23 Ambient Air Temperature Sensor

Sensor Asm Duct Air Temp B34 Evaporative Temperature Sensor

Sensor Asm I/S Air Temp B59 In-car Temperature Sensor

Coil A/C Clu L7 Compressor Clutch

Motor Asm Blo M3 Blower Motor

Motor Asm Eng Cool Fan M7_HP V6 High Power Cooling Fan System

Motor Asm Eng Cool Fan M7_V6 V6 Standard Cooling Fan S ys tem

Motor Asm Eng Cool Fan M7_V8 GEN III V8 Cooling Fan System

Window Rr R22 Heated Rear Window

Switch Asm Ign & Start S149 Ignition Switch

Actuator Asm Htr Wat Shutoff Vlv Y18 Water Valve Vacuum Solenoid Valve for LHD models

Actuator Asm I/S Air Vlv Y19 Solenoid Pack

Actuator Asm Temp Vlv Y37_LHD Air Mix Door Motor for LHD models

Actuator Asm Temp Vlv Y37_L Passenger’s Air Mix Door Motor for RHD models

Actuator Asm Temp Vlv Y37_R Driver’s Air Mix Door Motor for RHD models

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–7

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The following table lists the IVED standard wire colour abbreviations:

BK Black D-GN Dark green L-GN Light green RD Red

BU Blue GN Green OG Orange TN Tan

BN Brown GY Grey PK Pink WH White

D-BU Dark blue L-BU Light blue PU Purple YE Yellow

NOTE

For electrical connector locations and additional

wiring diagram information refer to Section 12P

Wiring Diagrams.

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–8

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Connectors A13 – M3

Figure 2F – 3

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–9

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Connectors M7 – X119

Figure 2F – 4

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–10

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Connectors X126 – Y37

Figure 2F – 5

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–11

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Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – V6 (LHD)

Figure 2F – 6

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–12

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Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – V6 (RHD)

Figure 2F – 7

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–13

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Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) Syste m – SCV6 (RHD)

Figure 2F – 8

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–14

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Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) System – Gen III V8 (LHD)

Figure 2F – 9

HVAC Occupant Climate Control (Auto A/C) – Diagnostics Page 2F–15

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Wiring Diagram: HVAC Occupant Climate Control (Auto A/C) Syste m – Gen III V8 (RHD)

Figure 2F – 10