2006 SUZUKI SX4 sensor

Downloaded from www.Manualslib.com manuals search engine 7B-28 Air Conditioning System: Manual Type
Evaporator Temperature Sensor InspectionS6RW0D7216011
Check resistance between terminals of evaporator
temperature sensor (1).
If check results are as not specified, replace evaporator
temperature sensor.
Evaporator temperature sensor resistance
0 °C (32 °F): 6.6 – 6.8 kΩ
25 °C (77 °F): 2.0 – 2.1 kΩ
Expansion Valve Removal and InstallationS6RW0D7216012
Removal
1) Recover refrigerant from the A/C system with
recovery and recycling equipment referring to
“Recovery” in “Operation Procedure for Refrigerant
Charge”.
2) Loosen a bolt (1) and remove pipes from expansion
valve (2).
3) Loosen bolts (3) and remove expansion valve.
Installation
Reverse removal procedure noting the following
instructions.
• Apply compressor oil to O-ring of expansion valve and
pipes.
• Tighten expansion valve bolts to specified torque.
Tightening torque
Expansion valve bolt: 4.5 N·m (0.45 kgf-m, 3.5 lb-
ft)
• Evacuate and charge the A/C system referring to
“Evacuation” and “Charge” in “Operation Procedure
for Refrigerant Charge”.
Expansion Valve InspectionS6RW0D7216013
Refer to “A/C System Performance Inspection”.
[A]: Resistance
[B]: Temperature
(kΩ)
6.75
2.00
0
3225
77 [A]
[B]
(˚C)
(˚F)
1
I7RW01721020-01
1
22 3
I4RS0A720028-01

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Manual Type 7B-29
A/C Refrigerant Pressure Sensor and Its Circuit
Inspection
S6RW0D7216014
1) Disconnect A/C refrigerant pressure sensor
connector.
2) Turn ignition switch to ON position.
3) Check if voltage between “RED” wire terminal and
“ORN” wire terminal of A/C refrigerant pressure
sensor connector is 4.75 V to 5.25 V.
If not, check A/C refrigerant pressure sensor circuit.
4) Connect A/C refrigerant pressure sensor connector
with ignition switch turned OFF.
5) Connect manifold gauge set to the charging valves.
6) Check A/C refrigerant pressure sensor voltage of
ECM connector referring to “A/C System Inspection
at ECM”.
If voltage is not as specified below, replace A/C
refrigerant pressure sensor.
A/C refrigerant pressure sensor voltage
specifications (A/C refrigerant pressure measured
by manifold gauge)
0.8 MPa (8.0 kgf/cm2, 116 psi): 1.40 – 1.78 V
1.4 MPa (14 kgf/cm2, 203 psi): 2.18 – 2.64 V
1.6 MPa (16 kgf/cm2, 232 psi): 2.44 – 2.92 V
1.8 MPa (18 kgf/cm2, 261 psi): 2.70 – 3.21 V
A/C Refrigerant Pressure Sensor Removal and
Installation
S6RW0D7216015
Removal
1) Recover refrigerant from the A/C system with the
recovery and recycling equipment referring to
“Recovery” in “Operation Procedure for Refrigerant
Charge”.
2) Disconnect negative (–) cable from battery.
3) Disconnect A/C refrigerant pressure sensor
connector.
4) Remove A/C refrigerant pressure sensor (1) from
liquid pipe (2).Installation
Reverse removal procedure noting the following
instructions.
• Apply compressor oil to O-ring of A/C refrigerant
pressure sensor.
• Tighten A/C refrigerant pressure sensor to specified
torque.
Tightening torque
A/C refrigerant pressure sensor (a): 11 N·m (1.1
kgf-m, 8.0 lb-ft)
• Evacuate and charge the A/C system referring to
“Evacuation” and “Charge” in “Operation Procedure
for Refrigerant Charge”.
A/C Switch InspectionS6RW0D7216016
• Check that there is continuity between terminal (1)
and terminal (2) when A/C switch is at ON position.
• Check that there is no continuity between terminal (1)
and terminal (2) when A/C switch is at OFF position.
If check result does not meet the above conditions,
replace HVAC control unit.
2
1
I5RW0A721029-01
(a)
I5RW0A721030-01
1
2
I5RW0A721031-01

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Specifications
Tightening Torque SpecificationsS6RW0D7217001
NOTE
The specified tightening torque is also described in the following.
“A/C System Major Components Location”
“Compressor Assembly Components”

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fasteners Information in Section 0A”.
Special Tools and Equipment
Recommended Service MaterialS6RW0D7218001
NOTE
Required service material is also described in the following.
“HVAC Unit Components”
“Compressor Assembly Components”

Special ToolS6RW0D7218002
Fastening partTightening torque
Note
N⋅mkgf-mlb-ft
Expansion valve bolt 4.5 0.45 3.5)
A/C refrigerant pressure sensor 11 1.1 8.0)
Compressor mounting bolt 25 2.5 18.0)
Armature plate nut 16 1.6 11.5)
Relief valve 8 0.8 6.0)
Material SUZUKI recommended product or Specification Note
Compressor oil MATSUSHITADENKI GU10 P/No.: 99000–99015–
00A)
Silicon sealant SUZUKI SILICON SEALANT KE-
347W (100g)P/No.: 99000–34220)
09900–06107 09990–06020
Snap ring pliers (opening
type)Manifold gauge set (R134a)
) / ) / ) / ) / )1.Manifold gauge
2.Charging hoses 3.Quick
connector 4.Refrigerant
container tap valve
5.Refrigerant container T
joint 6.Packing sets 7.Case
)
09990–86012 09991–06310
Gas leak detector Armature plate holder
This kit includes following
items.1. Gas leak detector,
2. Instruction manual, 3.
Filter, 4. Sensor, 5. Dri-sell
battery (size D) ) / )) / )
12
34
5

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General Description
Auto A/C System DescriptionS6RW0D7221001
The automatic type air conditioning system (auto A/C) is provided with the function to automatically control the inside
air temperature, fan speed, air flow outlet direction and air intake position by HVAC control module in addition to
functions of the manual type air conditioning system (manual A/C). Once the inside air temperature is set using the
temperature selector, HVAC control module automatically controls the inside air temperature at the constant level at all
times based on the inside air temperature, outside air temperature, amount of sunlight and engine coolant
temperature detected respectively by the inside air temperature sensor, outside air temperature sensor, sunload
sensor and ECT sensor. For the electronic control system components location, refer to “Electronic Control System
Components Location”. For the A/C system components location, refer to “A/C System Major Components Location”.
Auto A/C Electronic Control Input / Output Table
Temperature selector
MODE (air flow) selector
Blower speed selector
Air intake selector
AUTO switch A/C switch
Outside air
temperature
sensor
A/C refrigerant pressure sensor
Compressor relay
Blower motor controller
Temperature control actuator
Air flow control actuator
Air intake control actuator
BCM
ECM
Data link connector
HVAC control module
CPU
ECT sensor
Sunload sensor
Inside air temperature sensor
Evaporator temperature sensor
Condenser cooling fan relay
Wheel
speed
sensor
*
*
*
Combination meterABS control module
I6RW0C722001-01
*: CAN communication

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HVAC Control DescriptionS6RW0D7221002
Temperature Control
HVAC control module calculates the target temperature
control door position based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor and sunload sensor and
controls the temperature control actuator so that the
current position of the temperature control door matches
its target position.
Fan Speed Control
HVAC control module calculates the target blower fan
speed based on signals from the temperature selector,
inside air temperature sensor, outside air temperature
sensor, ECT sensor and sunload sensor, compares it
with the current blower fan speed inputted from the
blower motor controller to control the current blower fan
speed to the target level.
Air Flow Outlet Control
HVAC control module calculates the target temperature
control door position based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor, ECT sensor and sunload
sensor. Using thus obtained target temperature control
door position, it further calculates the target air flow
control door position and controls the air flow control
actuator so that the current air flow control door position
becomes the target position.
Air Intake Position Control
HVAC control module determines the position of the air
intake control door based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor and sunload sensor and
selects any of the following positions by controlling the
position of the air intake control door.
• FRESH position (FRE)
• RECIRCULATION position (REC)
• MIX position (MIX)A/C Compressor Relay Control
HVAC control module outputs A/C switch ON signal to
ECM via BCM when the vehicle state satisfy conditions
described below.
• A/C switch is ON
• Evaporator temperature is higher than specified value
• Evaporator temperature sensor malfunction is not
detected
Communication of ECM and BCM is established by CAN
(Controller Area Network). (For more detail of CAN
communication, 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
• A/C refrigerant pressure 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.
Sub-Cool A/C System DescriptionS6RW0D7221003
Refer to “Sub-Cool A/C System Description”.

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On-Board Diagnostic System DescriptionS6RW0D7221004
NOTE
The diagnostic information as diagnostic
trouble code (DTC) can be known by using
SUZUKI scan tool. For further details, refer to
“DTC Check”.

HVAC control module detects malfunctions, which may
occur in the following area.
• Inside air temperature sensor
• Evaporator temperature sensor
• Sunload sensor
• Temperature control actuator
• Air flow control actuator
• Temperature selector of HVAC control module
• Air flow selector of HVAC control module
• Blower speed selector of HVAC control module
• Back-up power supply circuit of HAVC control module
• Serial communication line between BCM and HVAC
control module• Received data from BCM as follows
– Outside air temperature sensor signal
– ECT sensor signal
– A/C refrigerant pressure sensor signal
– VSS signal
– Engine type signal
– Combination meter spec signal
– CAN communication circuit failure signal
When HVAC control module detects malfunction, the “A/
C” indicator light (1) flashes to warn and the diagnostic
trouble code (DTC) is stored in the memory of the
module. When diagnosing trouble, the DTC can be
checked according to “DTC Check”.
Schematic and Routing Diagram
A/C System Air Flow DiagramS6RW0D7222001
Refer to “A/C System Air Flow Diagram”.
1
I5RW0A722002-01

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Component Location
A/C System Major Components LocationS6RW0D7223001
Refer to “A/C System Major Components Location”.
[A]: Illumination control model 10. Air intake actuator 22. Compressor 34. “A/C” indicator light
[B]: Junction block with BCM 11. Air flow control actuator 23. HVAC control module 35. Rear defogger switch
[C]: Junction block without BCM 12. Temperature control actuator 24. BCM 36. Rear defogger indicator
1. Main fuse box 13. Inside air temperature sensor 25. A/C refrigerant pressure sensor 37. To other control module
2. Ignition switch 14. Outside air temperature sensor 26. Condenser cooling fan relay 38. Indicator light, switch,
selector
3. CAN junction connector 15. Evaporator temperature sensor 27. Information display 39. “FRE” indicator light
4. Rear defogger relay 16. Sunload sensor 28. Lighting switch 40. “REC” indicator light
5. Rear defogger 17. Junction block assembly 29. A/C switch 41. Temperature selector
6. Blower motor relay 18. ECM 30. Air intake selector 42. Blower speed selector
7. Blower motor 19. ECT sensor 31. To BCM 43. MODE (air flow) selector
8. Blower motor controller 20. Condenser cooling fan motor 32. ABS control module 44. Tail light
9. DLC 21. Compressor relay 33. Illumination light 45. Main relay

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Electronic Control System Components LocationS6RW0D7223002
NOTE
The figure shows left-hand steering vehicle. For right-hand steering vehicle, parts with (*) are installed
at the opposite side.

[A]
2
3
5
1
4
78*
18
19
20
23
22 219*
10*
11*
12*
13*
15* 16* 17
14*
8*6
I6RW0C722003-01
[A]: Junction block assembly viewed from relay
side8. Junction block assembly 16. Blower motor controller
1. A/C refrigerant pressure sensor 9. Sunload sensor 17. HVAC control module
2. Compressor relay 10. Inside air temperature sensor 18. Temperature selector
3. Condenser cooling fan relay 11. Air flow control actuator 19. Blower speed selector
4. Outside air temperature sensor 12. Temperature control actuator 20. MODE (air flow) selector
5. ECT sensor 13. Evaporator temperature sensor 21. A/C switch
6. Condenser cooling fan 14. Air intake actuator 22. Air intake selector
7. Blower motor relay 15. Blower motor 23. Rear defogger switch