temperature SUZUKI SWIFT 2000 1.G RG413 Service User Guide

HEATER AND VENTILATION 1A-9
HEATER CONTROL ASSEMBLY
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Remove steering column hole cover.
3) Remove heater control knob (1), center upper garnish (2),
center lower garnish (3) and glove box.
4) Disconnect air outlet control (3), temperature control (2) and
fresh air control (1) cables.
5) Remove heater control assembly (1), and then disconnect
blower fan switch connector (2) after unlock locking part (3)
as shown.
1. Heater control assembly 3. A/C switch LED (if equipped) 5. Fresh air control cable 7. Temperature control cable
2. A/C switch knob (if equipped) 4. Bulb 6. Air outlet control cable 8. Heater control knob

1A-10 HEATER AND VENTILATION
INSTALLATION
1) Reverse removal procedure for installation.
2) Adjust the following items.
a) Move air outlet control dial (1), temperature control dial (2)
and fresh air control lever (3) fully in arrow direction as
shown in figure.
b) Push air outlet lever (4), temperature lever (5) and door link
(6) fully in arrow direction and fix air outlet control cable (7),
temperature control cable (8) and fresh air control cable (9)
with clamp in position as shown in figure.
[A] : For LH model
[B] : For RH model
NOTE:
After installing control cables, be sure that control levers
move smoothly and stop at proper position.
[A] : For LH model
[B] : For RH model

AIR CONDITIONING (OPTIONAL) 1B-1
6F1
6F2
6G
1B
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
8E
9
10
10A
10B
SECTION 1B
AIR CONDITIONING (OPTIONAL)
CONTENTS
GENERAL DESCRIPTION .............................. 1B-3
REFRIGERANT CIRCULATION .................. 1B-3
REFRIGERANT TYPE ................................. 1B-3
MAJOR COMPONENTS AND
LOCATION ................................................... 1B-4
DIAGNOSIS ..................................................... 1B-5
GENERAL DIAGNOSIS TABLE ................... 1B-5
ABNORMAL NOISE DIAGNOSIS ................ 1B-7
QUICKLY CHECKING OF REFRIGERANT
CHARGE ...................................................... 1B-9
PERFORMANCE DIAGNOSIS .................. 1B-10
PERFORMANCE DIAGNOSIS TABLE .. 1B-12
DETAIL DIAGNOSIS TABLE (AMBIENT
TEMPERATURE AT 30°C (86°F)) ......... 1B-13
COMPRESSOR DRIVE BELT ................... 1B-15ELECTRICAL DIAGNOSIS ........................... 1B-16
WIRING DIAGRAM .................................... 1B-16
A/C SYSTEM INSPECTION OF ECM AND
ITS CIRCUITS ........................................... 1B-17
REFRIGERANT RECOVERY, EVACUATING
AND CHARGING........................................... 1B-20
OPERATION PROCEDURE FOR
REFRIGERANT CHARGING ..................... 1B-20
RECOVERY ............................................... 1B-21
REPLENISHING COMPRESSOR OIL ...... 1B-21
EVACUATING............................................ 1B-22
EVACUATING PROCEDURE ................ 1B-22
CHECKING SYSTEM FOR PRESSURE
LEAKS.................................................... 1B-23
CHARGING................................................ 1B-24
CHARGING PROCEDURE .................... 1B-24 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System :
 Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
 Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
CAUTION:
The air conditioning system of this vehicle uses refrigerant HFC-134a (R-134a).
None of refrigerant, compressor oil and component parts is interchangeable between two types of
A/C : one using refrigerant HFC-134a (R-134a) and the other using refrigerant CFC-12 (R-12).
Be sure to check which refrigerant is used before any service work including inspection and mainte-
nance. For identification between these two types, refer to “REFRIGERANT TYPE” in this section.
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.
NOTE:
For basic servicing method of the air conditioning system that is not described in this section, refer to
“AIR CONDITIONING BASIC MANUAL (Part number : 99520-02130)”.

1B-2 AIR CONDITIONING (OPTIONAL)
REMOVING MANIFOLD GAUGE SET ...... 1B-26
LEAK TEST................................................ 1B-26
LIQUID LEAK DETECTORS .................. 1B-26
ON-VEHICLE SERVICE ................................ 1B-27
SERVICE PRECAUTION........................... 1B-27
REFRIGERANT LINE ............................ 1B-27
HANDLING REFRIGERANT HFC-134a
(R-134a) ................................................. 1B-28
REFRIGERANT RECOVERY ................ 1B-28
REFRIGERANT CHARGE ..................... 1B-28
CONDENSER ASSEMBLY........................ 1B-28
RECEIVER/DRYER ................................... 1B-30
RADIATOR/CONDENSER COOLING FAN
MOTOR...................................................... 1B-31COOLING UNIT (EVAPORATOR) ............ 1B-32
A/C EVAPORATOR TEMPERATURE
SENSOR.................................................... 1B-34
EXPANSION VALVE ................................. 1B-34
A/C REFRIGERANT PRESSURE
SWITCH..................................................... 1B-35
A/C SWITCH.............................................. 1B-36
RADIATOR/CONDENSER COOLING FAN
MOTOR RELAY No.1, No.2 and No.3 ....... 1B-36
COMPRESSOR ......................................... 1B-36
MAGNET CLUTCH .................................... 1B-38
LIP TYPE SEAL ......................................... 1B-41
REQUIRED SERVICE MATERIAL ............... 1B-43
SPECIAL TOOL ............................................ 1B-44

AIR CONDITIONING (OPTIONAL) 1B-5
DIAGNOSIS
GENERAL DIAGNOSIS TABLE
Condition Possible Cause Correction
Cool air won’t come
out (A/C system won’t
operative)No refrigerant Perform recover, evacuation and charging.
Fuse blown Check fuses in circuit fuse and main fuse
boxes, and check short circuit to ground.
A/C switch faulty Check A/C switch.
Blower fan switch faulty Check blower fan switch referring to Sec-
tion 1A.
A/C evaporator temperature sensor
faultyCheck A/C evaporator temperature sen-
sor.
A/C refrigerant pressure switch faulty Check A/C refrigerant pressure switch.
Wiring or grounding faulty Repair as necessary.
ECT sensor faulty Check ECT sensor referring to Section
6E1.
ECM and its circuit faulty Check ECM and its circuit referring to Sec-
tion 6E1.
Cool air won’t come
out (A/C compressor
won’t operative)ECM faulty Check ECM and its circuit referring to Sec-
tion 6E1.
Magnet clutch faulty Check magnet clutch.
Compressor drive belt loosen or broken Adjust or replace drive belt.
Compressor faulty Check compressor.
Compressor thermal switch faulty Check compressor thermal switch
Cool air won’t come
out (A/C condenser
cooling fan motor
won’t operative)Fuse blown Check fuses in circuit fuse and main fuse
boxes, and check short circuit to ground.
Wiring or grounding faulty Repair as necessary.
Radiator/condenser cooling fan motor
relay faultyCheck radiator/condenser cooling fan
motor relay No.1, No.2 and No.3.
Radiator/condenser cooling fan motor
faultyCheck radiator/condenser cooling fan
motor.
ECM faulty Check ECM and its circuit referring to Sec-
tion 6E1.
Cool air won’t come
out (Blower fan motor
won’t operative)Fuse blown Check “HTR” fuse in circuit fuse box and
main fuses, and check short circuit to
ground.
Blower fan motor resistor faulty Check blower fan motor resistor to Section
1A.
Blower fan switch faulty Check blower fan switch referring to Sec-
tion 1A.
Wiring or grounding faulty Repair as necessary.
Blower fan motor faulty Check blower fan motor referring to Sec-
tion 1A.

1B-6 AIR CONDITIONING (OPTIONAL)
Cool air won’t come
out or insufficient
cooling (A/C system
normal operative)Insufficient or excessive charge of
refrigerantCheck charge of refrigerant and system for
leaks.
Condenser clogged Check condenser.
A/C evaporator clogged or frosted Check A/C evaporator and A/C evaporator
temperature sensor.
A/C evaporator temperature sensor
faultyCheck A/C evaporator temperature sen-
sor.
Expansion valve faulty Check expansion valve.
Receiver/dryer clogged Check receiver/dryer.
Compressor drive belt loosen or broken Adjust or replace drive belt.
Magnetic clutch faulty Check magnetic clutch.
Compressor faulty Check compressor.
Air in A/C system Replace dryer, and perform evacuation
and charging.
Air leaking from cooling unit or air duct Repair as necessary.
Heater and ventilation system faulty Check air inlet box (cooling unit), heater
control assembly and heater unit referring
to Section 1A.
Blower fan motor faulty Check blower fan motor referring to Sec-
tion 1A.
Excessive compressor oil existing in A/
C systemPull out compressor oil in A/C system cir-
cuit, and check compressor.
Cool air won’t come
out only intermittentlyWiring connection faulty Repair as necessary.
Expansion valve faulty Check expansion valve.
Excessive moisture in A/C system Replace dryer, and perform evacuation
and charging.
Magnetic clutch faulty Check magnetic clutch.
Excessive charge of refrigerant Check charge of refrigerant.
Cool air comes out
only at high speedCondenser clogged Check condenser.
Insufficient charge of refrigerant Check charge of refrigerant.
Air in A/C system Replace dryer, and perform evacuation
and charging.
Compressor drive belt loosen or broken Adjust or replace drive belt.
Compressor faulty Check compressor.
Cool air won’t come
out only at high speedExcessive charge of refrigerant Check charge of refrigerant.
A/C evaporator frosted Check A/C evaporator and A/C evaporator
temperature sensor.
Insufficient velocity of
cooled airA/C evaporator clogged or frosted Check A/C evaporator and A/C evaporator
temperature sensor.
Air leaking from cooling unit or air duct Repair as necessary.
Blower fan motor faulty Check blower fan motor referring to Sec-
tion 1A.
Wiring or grounding faulty Repair as necessary. Condition Possible Cause Correction

1B-8 AIR CONDITIONING (OPTIONAL)
ABNORMAL NOISE FROM CRANKSHAFT PULLEY
ABNORMAL NOISE FROM TENSION PULLEY
ABNORMAL NOISE FROM A/C EVAPORATOR
ABNORMAL NOISE FROM BLOWER FAN MOTOR
Condition Possible Cause Correction
A large rattling noise
is heard at idle or sud-
den acceleration.Loosen crankshaft pulley bolt Retighten bolt.
Condition Possible Cause Correction
Clattering noise is
heard from pulley.Worn or damaged bearing Replace tension pulley.
Pulley cranks upon
contact.Cracked or loose bracket Replace or retighten bracket.
Condition Possible Cause Correction
Whistling sound is
heard from A/C evapo-
rator.Depending on the combination of the interior/
exterior temperatures, engine rpm and refriger-
ant pressure, the refrigerant flowing out of the
expansion valve may, under certain conditions,
make a whistling soundAt times, slightly decreasing refrig-
erant volume may stop this noise.
Inspect expansion valve and
replace if faulty.
Condition Possible Cause Correction
Blower fan motor
emits a chirping
sound in proportion to
its speed of rotation.Worn or damaged motor brushes or commuta-
torRepair or replace blower fan motor.
Fluttering noise or
large droning noise is
heard from blower fan
motor.Leaves or other debris introduced from fresh air
inlet to blower fan motorRemove debris and make sure that
the screen at fresh air inlet is intact.

AIR CONDITIONING (OPTIONAL) 1B-9
QUICKLY CHECKING OF REFRIGERANT
CHARGE
The following procedure can be used for quickly checking
whether the A/C system has a proper charge of refrigerant or not.
Run engine at fast idle, and operate A/C at its maximum cooling
capacity for a few minutes.
Then, look at the sight glass (1) on condenser outlet pipe (2) and
compare what is observed with the symptoms listed in below.
CHECKING REFRIGERANT CHARGE
[A] : LH model 3. Bubbles
[B] : RH model 4. A/C refrigerant pressure switch
Item
No.Symptom Charge of refrigerant condi-
tionCorrection
1 Bubbles observed in sight glass Insufficient charge of refrigerant
in systemCheck system for leaks with a
leak tester.
2 No bubbles observed in sight glass No or insufficient charge of
refrigerant in systemRefer to the items 3 and 4.
3 No temperature difference between
compressor inlet and outletEmpty or nearly empty system Evacuate and charge system
and then check it for leaks with
a leak tester.
4 Noticeable temperature difference
between compressor inlet and out-
letProper or too much charge of
refrigerant in systemRefer to the items 5 and 6.
5 When A/C is turned OFF, refriger-
ant in sight glass clears immedi-
ately and remains clearToo much charge of refrigerant
in systemRecharge with specified amount
of refrigerant.
6 When A/C is turned OFF, refriger-
ant in sight glass once produces
bubbles and then clearsProper charge of refrigerant in
systemNo correction needed because
charge of refrigerant is normal.
NOTE:
For specified amount of refrigerant, refer to “OPERATION PROCEDURE FOR A/C WITH REFRIGER-
ANT” in this section.

1B-10 AIR CONDITIONING (OPTIONAL)
PERFORMANCE DIAGNOSIS
1) Confirm that vehicle and environmental conditions are as fol-
lows.
Vehicle is not exposed to direct sun.
Ambient temperature is within 15 – 35°C (59 – 95°F).
2) Make sure that high pressure valve (1) and low pressure
valve (2) of manifold gauge set (3) are firmly closed.
3) Connect high pressure charging hose (4) to high pressure
service valve (5), and connect low pressure charging hose
(6) to low pressure service valve (7).
4) Bleed the air in charging hoses (4), (6) by loosening their
respective nuts on manifold gauge set (3), utilizing the refrig-
erant pressure. When a hissing sound is heard, immediately
tighten nut.
5) Warm up engine to normal operating temperature (engine
coolant temperature at 80 – 90°C (176 – 194°F)) and keep it
at specified idle speed. (Radiator cooling fan should not be
working when checking pressure and temperature.)
6) Turn A/C switch to ON position, and set blower fan switch at
“H” (4th position), temperature dial at “COOL”, air outlet con-
trol dial at “FACE” and fresh/recirculation control dial at
“RECIRCULATION”. (Confirm that A/C compressor and radi-
ator/condenser cooling fan are working.)
Keep all windows, doors and engine food open.
Performance diagnosis condition
7) With dry bulb thermometer (1) inserted into center duct air
outlet and another one set near evaporator air inlet, read
temperature indicated on each thermometer. CAUTION:
Do not interchange high and low pressure charging
hoses by mistake.
Ambient temperature 15 – 35°C (59 – 95°F)
Engine rpm Keep to 1,500 rpm.
Blower fan switch“H” (4th position)
Temperature control“Cool”
Air outlet control“Face”
Vehicle Doors All open
Air inlet door position Recirculation

AIR CONDITIONING (OPTIONAL) 1B-11
8) Check for each pressure of low side and high side if it is
within shaded range of graph.
If each gauge reading is out of specified pressure, correct
defective part referring to “PERFORMANCE DIAGNOSIS
TABLE”.
Low side and high side pressure example :
9) Check inlet port temperature-to-outlet port temperature rela-
tionship using graph.
For example, if evaporator inlet port temperature is 25°C
(75°F) and center duct air outlet temperature is 8°C (46°F),
their crossing point is within acceptable range as shown in
graph.
If crossing point is out of acceptable range, diagnose trouble
referring to “PERFORMANCE DIAGNOSIS TABLE”. NOTE:
Pressure registered on gauge varies with ambient tem-
perature. Therefore, use the graphs when determining if
pressures are normal or not.
Gauges should read as follows when ambient tempera-
ture is 30°C (86°F).
Pressure
on high pressure gauge1400 – 1750 kPa
14.0 – 17.5 kg/cm
2
199.1 – 248.9 psi
Pressure
on low pressure gauge230 – 350 kPa
2.3 – 3.5 kg/cm
2
32.7 – 49.8 psi