2006 SUZUKI SX4 Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine Heater and Ventilation: 7A-9
Blower Speed Selector InspectionS6RW0D7106010
Check blower speed selector for each terminal to
terminal continuity. If check result does not meet the
following conditions, replace HVAC control unit.
Air Intake Selector InspectionS6RW0D7106011
• Check that there is continuity between terminal (1)
and terminal (2) when air intake selector is at “FRE”
position.
• Check that there is no continuity between terminal (1)
and terminal (2) when air intake selector is at “REC”
position.
If check result does not meet the above conditions,
replace HVAC control unit.
Air Intake Control Actuator Removal and
Installation
S6RW0D7106012
Removal
1) Disconnect negative cable from battery.
2) Remove glove box from instrument panel.
3) Remove passenger side foot duct (1) from HVAC
unit by removing screw (2). (LH steering vehicle
only.)
4) Disconnect connector (1) from air intake control
actuator (2).
5) Detach linkage rod (3) and remove air intake control
actuator (2) by removing screws (4).
IHMH
GNDLML
PositionTerminalI
OFF
1
2
3
4LMLMHHGND
I4RS0A710019-01
1
2
I5RW0A710007-01
1
2
I7RW01710007-01
3
1
24I7RW01710016-02

Downloaded from www.Manualslib.com manuals search engine 7A-10 Heater and Ventilation:
Installation
Reverse removal procedure noting the following
instruction.
• Be sure to insert the linkage rod (1) into the hole (2) of
air intake control actuator.Air Intake Control Actuator InspectionS6RW0D7106013
Check air intake control actuator as follows:
1) Using service wire, connect battery positive terminal
to “d” terminal and battery negative terminal to
terminal “a”. And, check if air intake selector link
operates smoothly and it stops at “FRE” position (1).
2) Using service wire, connect battery positive terminal
to “d” terminal and battery negative terminal to
terminal “c”. And, check if air intake selector link
operates smoothly and it stops at “REC” position (2).
3) For auto A/C model, using service wire, connect
battery positive terminal to “d” terminal and battery
negative terminal to “b” terminal. And, check air
intake selector link operates smoothly and it stops at
MIX position (3).
If malfunction is found, replace air intake control
actuator.
21
I7RW01710017-02
4. Motor rotation direction
“a” “b” “c” “d”
1 3
2
4“a”
“b”
“c” “d”
I7RW01710018-05

Downloaded from www.Manualslib.com manuals search engine Heater and Ventilation: 7A-11
Center Ventilation Louver Removal and
Installation
S6RW0D7106014
Removal
1) Disconnect negative (–) cable from battery.
2) Remove audio unit from instrument panel referring to
“Audio Unit Removal and Installation (If Equipped) in
Section 9C”.
3) Remove center ventilation louver (1) with garnish (2)
from instrument panel, and then disconnect
connector from hazard switch.
NOTE
Garnish is fitted to instrument panel with six
clips. When removing garnish from
instrument panel, be careful not to break
them.

4) Separate center ventilation louver and garnish.
Installation
Reverse removal procedure.
Side Ventilation Louver Removal and
Installation
S6RW0D7106015
Removal
1) Remove instrument panel from vehicle body
referring to “Instrument Panel Removal and
Installation in Section 9C”
2) Remove steering support member (1), defroster
nozzle (2) and ventilator duct (3) from instrument
panel.3) Remove side ventilation louver (1) from instrument
panel while pressing clips (2).
Installation
Reverse removal procedure noting the following
instruction.
• Side ventilation louver is fitted to instrument panel
with four clips (1). When installing side ventilation
louver to instrument panel, position the smallest clip to
the top.
1
2
I5RW0A710008-01
3
12
I5RW0A710009-01
1
2
2
I5RW0A710010-01
1
1
I5RW0A710011-01

Downloaded from www.Manualslib.com manuals search engine 7A-12 Heater and Ventilation:
Rear Duct Removal and Installation (If
Equipped)
S6RW0D7106016
Removal
1) Disconnect negative (–) cable at battery.
2) Remove front seats referring to “Front Seat Removal
and Installation in Section 9G”.
3) Remove console box referring to “Console Box
Components in Section 9H”.
4) Take off carpet till rear ducts is totally exposed.
5) Remove right and left rear ducts.
6) Remove center rear duct as follows, if necessary.
a) Remove HVAC control unit referring to “HVAC
Control Unit Removal and Installation” (non-A/C
or manual A/C) or “HVAC Control Module
Removal and Installation in Section 7B” (auto A/
C).
b) Remove center rear duct from HVAC unit.
Installation
Reverse removal procedure noting the following
instructions.
• Install HVAC control unit referring to “HVAC Control
Unit Removal and Installation” (non-A/C or manual A/
C) or “HVAC Control Module Removal and Installation
in Section 7B” (auto A/C), if removed.
• Install console box referring to “Console Box
Components in Section 9H”.
• Install front seats referring to “Front Seat Removal
and Installation in Section 9G”.
HVAC Air Filter Removal and Installation (If
Equipped)
S6RW0D7106017
Removal
1) Remove glove box from instrument panel.
2) Remove air filter (1) from HVAC unit while releasing
claws (2).
Installation
Reverse removal procedure noting the following
instructions.
• Position air filter by directing its arrow mark to the
upward.
HVAC Air Filter Inspection (If Equipped)S6RW0D7106018
Reference: “HVAC Air Filter Removal and Installation (If
Equipped)”
Check that filter is not excessively dirty, damage or oily,
clean filter with compressed air from air outlet side of
filter. If abnormality is found, replace filter with new one.
1. Center rear duct 4. Clip
2. Right rear duct 5. HVAC unit
3. Left rear duct
324 5
1
4
I7RW01710019-01
12
2
I6RW0C710010-01
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I4RS0A710032-01

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Manual Type 7B-1
HVAC
Air Conditioning System
Manual Type
Precautions
A/C System CautionS6RW0D7210001
CAUTION!
The A/C system of this vehicle uses HFC-134a (R-134a) refrigerant, specified compressor oil and
specified parts.
Do not use CFC-12 (R-12) refrigerant, R-12 exclusive use compressor oil and R-12 exclusive parts in
this A/C system, do not attempt to use R-12 servicing equipment. Otherwise, use of it will result in
leakage of refrigerant, damage or other faulty condition of A/C system and damage or other faulty
condition of servicing equipment.
When replenishing or changing refrigerant and compressor oil and when replacing parts, make sure
that the material or the part to be used is appropriate to the A/C installed in the vehicle being serviced.
Use of incorrect one will result in leakage of refrigerant, damage in parts or other faulty condition.

Precautions on Servicing A/C SystemS6RW0D7210002
WARNING!
Should refrigerant HFC-134a (R-134a) is exposed to your eye(s), consult a doctor immediately.
• Do not reuse your hand to rub affected eye(s). Instead, use fresh cold water to splash it over
affected area to thus gradually raise its temperature above the freezing point.
• Obtain proper treatment as soon as possible from a doctor or eye specialist. Should liquid
refrigerant HFC-134a (R-134a) is exposed to your skin, such affected part should be treated in the
same manner as when skin is frostbitten or frozen.

Handling Refrigerant HFC-134a (R-134a)
• Always wear goggles to protect your eyes.
• Avoid direct contact to liquid refrigerant.
• Do not heat refrigerant container higher than 40 °C (104 °F).
• Do not discharge refrigerant into atmosphere.
• Do not expose bright metals to liquid refrigerant. Refrigerant combined with moisture is corrosive and tarnishes
surfaces of bright metals including chrome.
• Never use heat for bending pipes. When bending a pipe, try to make its bending angle as smooth as possible.
• Keep internal parts of air conditioning free from moisture and dirt. When disconnecting any line from system, install
a blind plug or cap to the fitting immediately.
• When handling recovery and recycling equipment, be sure to follow the instruction manual for the equipment.
• Check local governmental regulations regarding working with refrigerator systems and its tooling.
• When connecting hoses and pipes, apply a few drops of compressor oil (refrigerant oil) to O-ring.
• Replace O-ring with new one once hoses, pipes and parts disconnected.
• When tightening or loosening a fitting, use two wrenches, one for turning and the other for support.
• Route drain hose so that drained water does not make any contact to vehicle components.
• If pipes or hoses are replaced, replenish specified amount of compressor oil to compressor suction side referring to
“Replenishing Compressor Oil” in “Operation Procedure for Refrigerant Charge”.

Downloaded from www.Manualslib.com manuals search engine 7B-2 Air Conditioning System: Manual Type
Refrigerant Recovery
When discharging refrigerant out of A/C system, always recover it by using refrigerant recovery and recycling
equipment because discharging refrigerant HFC-134a (R-134a) into atmosphere would cause adverse effect to
environments referring to “Recovery” in “Operation Procedure for Refrigerant Charge”.
Refrigerant Charge
After performing compressor oil replenishment and evacuation, charge a proper amount of refrigerant to A/C system
referring to “Charge” in “Operation Procedure for Refrigerant Charge”.
General Description
Sub-Cool A/C System DescriptionS6RW0D7211001
In the sub-cool A/C system (condenser integrated with receiver / dryer), the inside of the condenser is divided into the
condensation part and the sub-cooler part, and the receiver / dryer is located between those. In the receiver / dryer,
the refrigerant is separated into the vapor refrigerant and the liquid refrigerant. Only the liquid refrigerant is delivered to
the sub-cooler part of the condenser. The refrigerant is supercooled by the sub-cooler part of the condenser.
I5RW0A721003-02
[A]: Liquid 2. Magnet clutch 6. Expansion valve 10. Desiccant
[B]: Vapor 3. Condenser 7. A/C evaporator 11. Filter
[C]: Superheated vapor 4. Receiver/dryer 8. Condensation part 12. Vapor refrigerant
1. Compressor 5. Refrigerant pressure sensor 9. Sub-cooler part 13. Liquid refrigerant

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Manual Type 7B-3
Manual A/C Electronic Input Output TableS6RW0D7211002
A/C Operation Description at ECMS6RW0D7211003
ECM controls the A/C compressor relay and condenser cooling fan relay according to signals from HVAC control unit,
A/C refrigerant pressure sensor, ECT sensor and evaporator temperature sensor. The A/C switch ON signal from
HVAC control unit is transmitted to ECM through BCM. For CAN communication system, refer to “CAN
Communication System Description in Section 1A”.
ECM turns ON the A/C compressor relay when the vehicle state satisfy conditions described below.
• A/C switch ON signal is inputted from HVAC control unit
• A/C refrigerant pressure is within specified range
• Evaporator temperature is within specified range
• Engine speed is within specified range
• Engine coolant temperature is lower than specified value
• Throttle opening is lower than specified value
• Vehicle is not in either state of starting or quick acceleration
• ECT sensor malfunction is not detected
• A/C refrigerant pressure sensor malfunction is not detected
Condenser Cooling Fan Relay Control
ECM turn ON the condenser cooling fan relay at the same time when ECM turn ON the A/C compressor relay.
ECM
BCM
A/C switch Air intake selector
A/C refrigerant pressure sensor
A/C evaporator temperature sensorCompressor relay
ECT sensor
Condensor cooling fan relay
*
Wheel speed sensor (VSS)
HVAC control unit
Blower motor Blower motor resistor
Air intake control actuator
*Blower speed selector
ABS control module
I6RW0C721001-01
*: CAN communication

Downloaded from www.Manualslib.com manuals search engine 7B-4 Air Conditioning System: Manual Type
Schematic and Routing Diagram
A/C System Air Flow DiagramS6RW0D7212001
1312
13 9
9 10
11 11 1514
1718
: A
: B
4
7
356
2 16
8
191
20
I7RW01721002-03
A: Air flow 5. Discharge hose 11. Foot air 17. Air intake door
B: Refrigerant flow 6. Suction hose 12. Front defroster air 18. Temperature control door
1. HVAC unit 7. Liquid pipe 13. Side defroster air 19. Air flow control door
2. Compressor 8. Expansion valve 14. Fresh air 20. Heater core
3. Condenser assembly 9. Side ventilation air 15. Recirculation air
4. Receiver/dryer 10. Center ventilation air 16. Evaporator