2006 SUZUKI SX4 intake

Downloaded from www.Manualslib.com manuals search engine 7B-44 Air Conditioning System: Automatic Type
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

Downloaded from www.Manualslib.com manuals search engine 7B-50 Air Conditioning System: Automatic Type
Not Using SUZUKI Scan Tool
NOTE
In case of malfunction of temperature
selector, blower speed selector and air flow
selector, DTC can not be checked by the
following procedure. Use SUZUKI scan tool
for DTC check.

1) Light over sunload sensor vertically with an
incandescent light of approximately 100 W apart
from about 100 mm (3.94 in.).
NOTE
If sunload sensor is not lighted over with an
incandescent light, DTC of sunload sensor is
detected as current DTC even though there is
not any malfunction.

2) Set the following selectors to specified positions
below respectively with ignition switch off position.
• Temperature selector (1) is maximum cool
position
• Blower speed selector (2) is OFF position
• Air flow selector (3) is AUTO position
3) While pressing A/C switch (4) and air intake selector
(5) simultaneously, turn ignition switch to ON
position.
4) Wait for about 5 seconds (start of diagnosis).
5) Read flashing pattern of “FRE” (6) and “REC” (7)
indicator lights which represents DTC and write it
down.
NOTE
• When 2 or more current DTCs are
detected, only DTC having the highest
priority is indicated. Therefore, after
troubleshooting the malfunction, DTC
check has to be performed again to see if
any other DTC(s) is detected.
• Pressing “A/C” switch alternates display
of current DTC and history DTC. “A/C”
indicator light (8) remains off when display
is in current DTC mode and it lights up
when display is in history DTC mode.
• When a history DTC is indicated while 2 or
more history DTCs are detected, it is
possible to have other history DTC(s)
stored in HVAC control module displayed
by pressing the air intake selector.

Example: When inside air temperature sensor
circuit malfunction (Open) is set
Example: When VSS signal failure (Data error) is
set
6) After completing above check, turn ignition switch to
“OFF” position.
[A]: “REC” indicator light L: OFF
[B]: “FRE” indicator light a. About 0.5 seconds
H: ON b. About 2 seconds
[A]: “REC” indicator light a. About 0.5 seconds
[B]: “FRE” indicator light b. About 3 seconds
H: ON c. About 1.5 seconds
L: OFF
123
458
6
7I5RW0A722005-01
[A]
[B]H
L
H
L [B]
[A]
ab
aI5RW0A722006-02
[A]
[B]H
L
H
L [B]
[A]
ab
aaaa
c
I5RW0A722025-01

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-51
DTC ClearanceS6RW0D7224005
Using SUZUKI Scan tool
1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector
(DLC) (1) located on underside of instrument panel
at driver’s seat side.
Special tool
(A): SUZUKI scan tool
3) Turn ignition switch to ON position.
4) Erase DTC according to instructions displayed on
SUZUKI scan tool.
NOTE
To know how to use SUZUKI scan tool, refer
to operator’s manual for SUZUKI scan tool.

5) After completing the clearance, perform “DTC
Check” and confirm if normal DTC (No code) is
displayed.
6) Turn ignition switch to OFF position, and then
disconnect SUZUKI scan tool from DLC.Not Using SUZUKI Scan Tool
1) Display history DTC by HVAC control module
referring to “Not Using SUZUKI Scan Tool” under
“DTC Check”.
2) Press air intake selector (1) and “A/C” switch (2) at
the same time for 5 seconds or more.
3) After completing above Steps, turn ignition switch to
OFF position.
4) Perform “DTC Check” and confirm if normal DTC is
indicated.
(A)
1I5RW0A722004-01
21
I5RW0A722007-01

Downloaded from www.Manualslib.com manuals search engine 7B-56 Air Conditioning System: Automatic Type
Scan Tool Data Definitions
TEMP CONT SWITCH: (Temperature control selector
position, Max Cool, °C / °F, Max Hot): This
parameter indicates the selected position of
temperature control selector.
CABIN TEMPERATURE: (In-car temperature, °C, °F):
This parameter indicates the in-car temperature
detected by inside air temperature sensor.OUTSIDE AIR TEMP (Outside air temperature, °C,
°F): This parameter indicates the outside air
temperature detected by outside air temperature
sensor.
EVAPORATOR TEMP (Evaporator temperature, °C,
°F): This parameter indicates the temperature of air
passed through evaporator.
COOLANT TEMP (Engine Coolant Temperature °C,
°F): This parameter indicates the engine coolant
temperature detected by engine coolant temperature
sensor. ) COOLANT TEMP
Ignition switch turned ONEngine coolant temperature is
displayed
) SUN LOAD Reference value depends on the situation 0 W/m
2 – 1988 W/m2
)MODE CONT
SWITCHIgnition switch turned ON and air flow selector at
AUTO positionAUTO (Selected position of air flow
selector is displayed)
) FAN CONT SWITCHIgnition switch turned ON and blower speed selector
at AUTO positionAUTO (Selected position of blower
speed selector is displayed)
) FAN DESIRED VOLTIgnition switch turned ON and blower speed selector
at HighApprox. 12.0 V
Ignition switch turned ON and blower speed selector
at LowApprox. 4.0 V
) AIR MIX POS SENIgnition switch turned ON and temperature selector
at maximum cool positionApprox. 0.5 V
Ignition switch turned ON and temperature selector
at maximum hot positionApprox. 4.5 V
)MODE POS SENSORIgnition switch turned ON and air flow selector at
DEF positionApprox. 4.5 V
Ignition switch turned ON and air flow selector at
VENT positionApprox. 0.5 V
) A/C CONT SIGA/C switch turned ON, blower speed selector at other
than OFF position with engine runningON
A/C switch turned OFF with engine running OFF
) BLOWER LOAD SIGIgnition switch turned ON, blower speed selector at
other than OFF positionON
Ignition switch turned ON, blower speed selector at
OFF positionOFF
) AIR INTAKE MODEIgnition switch turned ON and air intake selector at
fresh air (FRE) positionFRE
Ignition switch turned ON and air intake selector at
recirculation air (REC) positionREC
Ignition switch turned ON, air flow selector and
blower speed selector at AUTO positionAUTO
) REFRIGERANT
PRESSUREA/C ON (A/C is operating) with engine running at
ambient temperature 30 °C (86 °F)1130 – 1560 kPa (For details, refer to
pressure of high pressure gauge
under “A/C System Performance
Inspection”)
A/C OFF (A/C is not operating) with engine running
at ambient temperature 30 °C (86 °F) and engine
coolant temperature 90 °C (194 °F) – 100 °C (212
°F)600 – 1000 kPa after longer than 10
minute for A/C switch turned off
) A/C COMP CLUTCHA/C switch turned ON, blower speed selector at other
than OFF position with engine runningON
A/C switch turned OFF with engine running OFF
) VEHICLE SPEED At stop with ignition switch turned ON 0 km/h (0 mph)
) ENGINE TYPE Ignition switch turned ON Engine type is displayed.
) METER SPEC Ignition switch turned ONCombination meter spec is displayed. Scan Tool Data ConditionNormal Condition / Reference
Va l u e

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-57
SUN LOAD (W/m2): This parameter indicates the
amount of sunlight detected by sunload sensor.
MODE CONT SWITCH (Air flow selector position,
AUTO, FACE, B/L, FOOT, D/F, DEF): This
parameter indicates the selected position of air flow
selector.
FAN CONT SWITCH (Blower speed selector, AUTO,
OFF, 1st – 8th): This parameter indicates the
selected position of blower speed selector.
FAN DESIRE VOLT (Fan desired voltage, V): This
parameter indicates the consumption voltage of
blower motor.
AIR MIX POS SENSOR (Temperature control
actuator position sensor, V): This parameter
indicates the input signal from position sensor in
temperature control actuator.
MODE POS SENSOR (Air flow control actuator
position sensor, V): This parameter indicates the
input signal from position sensor in air flow control
actuator.
A/C CONT SIG (A/C control signal, ON, OFF): This
parameter indicates the state of A/C switch.BLOWER LOAD SIG (Blower fan load signal, ON,
OFF): ON: Position of blower speed selector is 1st
position or more.
OFF: Position of blower speed selector is OFF
position.
AIR INTAKE MODE (Air intake selector position,
AUTO, FRE, REC): This parameter indicates the
selected position of air intake selector.
REFRIGERANT PRESSURE (A/C refrigerant absolute
pressure, kPa): This parameter indicates the A/C
refrigerant absolute pressure calculated by ECM
A/C COMP CLUCH (A/C compressor magnet clutch,
ON, OFF): This parameter indicates the state of the
A/C compressor magnet clutch.
VEHICLE SPEED (km/h, mph): This parameter
indicates the vehicle speed calculated by ECM.
ENGINE TYPE (Engine type signal, J20, M16 or
M15): This parameter indicates the engine type
signal transmitted by ECM.
METER SPEC (Combination meter spec signal, EU,
UK, US, Canada, DOM): This parameter indicates
the combination meter spec signal transmitted by
combination meter.
Visual InspectionS6RW0D7224009
Check visually the following parts and systems.
DTC B1502: Inside Air Temperature Sensor Circuit MalfunctionS6RW0D7224010
Wiring DiagramInspection item Correction
• Refrigerant leakage and amount
• A/C pipe or hose disconnection,
looseness and
deterioration
• A/C compressor drive belt looseness and damageRefer to “Compressor Drive Belt Inspection
and Adjustment”.
• Battery fluid level and corrosion
of terminal
• Connectors of electric wire harness disconnection and
friction
• Fuses burning
• Parts installation and damage
• Other parts that can be checked visually
5V
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
ORNORNPNK/BLKG20-10
21
3 [S]
[G]
G20-24
I7RW01722004-01
[S]: Inside air temperature sensor signal circuit 1. HVAC control module 3. To other sensors
[G]: Inside air temperature sensor ground circuit 2. Inside air temperature sensor

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-77
G20-8 BLU/WHTElectric load signal for
blower motor10 – 14 V• Ignition switch turned ON, blower speed selector
OFF or 1st position
• Ignition switch turned ON, blower speed selector
from 1st to 2nd position
0 – 2 V• Ignition switch turned ON, blower speed selector
between 3rd and HIGH position
• Ignition switch turned ON, blower speed selector
from 3rd to 2nd position
G20-9 WHT/BLKEvaporator temperature
sensor signalApprox. 2.6 VIgnition switch turned ON, evaporator temperature 0
°C (32 °F)
Approx. 1.7 VIgnition switch turned ON, evaporator temperature
15 °C (59 °F)
Approx. 1.0 VIgnition switch turned ON, evaporator temperature
30 °C (86 °F)
G20-10 PNK/BLKInside air temperature
sensor signalApprox. 2.5 VIgnition switch turned ON, room temperature 25 °C
(77 °F)
Approx. 3.7 VIgnition switch turned ON, room temperature 0 °C
(32 °F)
G20-11 — — —
G20-12 WHTOutput of 5 V power
source for air flow control
actuator position sensor
and temperature control
actuator position sensor4 – 6 V Ignition switch turned ON
G20-13 YELSerial communication line
of BCMRefer to “Reference waveform No. 2: Automatic Type”.
G20-14 — — — —
G20-15 BRN/YELAir flow control actuator
(FACE)10 – 14 VIgnition switch turned ON, air flow control actuator is
working in operation from “DEF” to “FACE” position
0 – 1 VIgnition switch turned ON, except the above
condition
G20-16 BRN/WHTAir flow control actuator
(DEF)10 – 14 VIgnition switch turned ON, air flow control actuator is
working in operation from “FACE” to “DEF” position
0 – 1 VIgnition switch turned ON, except the above
condition
G20-17 GRNAir intake actuator
(FRESH AIR)0 – 1 VIgnition switch turned ON, air intake selector “FRE”
position
10 – 14 VIgnition switch turned ON, air intake selector “REC”
position
G20-18 REDAir intake actuator
(RECIRCULATION AIR)0 – 1 VIgnition switch turned ON, air intake selector “REC”
position
10 – 14 VIgnition switch turned ON, air intake selector “FRE”
position
G20-19 GRN/REDAir intake actuator (MIX
AIR)10 – 14 VIgnition switch turned ON, air intake selector “FRE”
or “REC” position
0 – 1 VIgnition switch turned ON, air intake selector is
working in operation from “FRE” to “REC” or “REC”
to “FRE” position
G20-20 — — — —
G20-21 GRN/WHT A/C switch signal Refer to “Reference waveform No. 1: Automatic Type”.
G20-22 RED/BLK Electric power source 10 – 14 V Ignition switch turned ON
G20-23 BLK/ORNGround for HVAC control
moduleBelow 0.5 V Ignition switch turned ON
G20-24 ORN Ground for sensors Below 0.5 V Ignition switch turned ON Terminal Wire Color CircuitNormal
Vo l ta g eCondition

Downloaded from www.Manualslib.com manuals search engine 7B-80 Air Conditioning System: Automatic Type
HVAC Unit ComponentsS6RW0D7226002
1
10
1
29
9
8
3
29
21
3
20 20
20
19
23
22
5*
4
28*15 16*
30
29*
30
17*
18*2 1312 11
5*
26
2725
1424
29
67
*
I6RW0C722008-01
1. Blower upper case 9. Air intake control link 17. Expansion valve 25. Inside air temperature sensor
2. Blower lower case 10. Air intake control door 18. Expansion pipe 26. Aspirator
3. Heater unit upper case 11. Blower motor 19.Air flow control actuator 27. Aspirator hose
4. Heater unit lower case 12. Blower motor cap 20. Air flow control links 28. Drain hose
5. Foot duct 13. Blower motor controller 21. Air flow control door assembly 29. Packing
6. HVAC air filter (if equipped) 14. Heater core 22. Temperature control actuator 30. O-ring
: Apply compressor oil.
7. Cover (without HVAC air
filter)15. Evaporator 23. Temperature control link : Do not reuse.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-81
HVAC Unit Removal and InstallationS6RW0D7226003
Refer to “HVAC Unit Removal and Installation”.
Temperature Control Actuator Removal and
Installation
S6RW0D7226004
Removal
1) Disconnect negative (–) cable at battery.
2) Remove steering column hole cover from instrument
panel.
3) Remove driver side foot duct from HVAC unit.
4) Disconnect temperature control actuator connector
(1).
5) Remove temperature control actuator (2) from HVAC
unit by removing screws (3).Installation
Reverse removal procedure noting the following
instructions.
• Before installing actuator, make sure that position of
actuator lever is in between “MAX HOT” position and
“MAX COOL” position.
• Be sure to insert pin (1) of temperature control
actuator into the groove (2) of link.
Temperature Control Actuator and Its Circuit
Inspection
S6RW0D7226005
1) Remove temperature control actuator from HVAC
unit referring to “Temperature Control Actuator
Removal and Installation”.
2) Connect connector to temperature control actuator.
3) Set temperature selector to “MAX COOL” position
with ignition switch turned ON.
4) Connect voltage meter between terminal “2” and
body ground.
5) Turn temperature selector to “MAX HOT” position.
8. Air intake control actuator 16. Evaporator temperature
sensor24. Temperature control door
assembly
3
2
3
1
I7RW01722018-01
1
2
I7RW01722019-01