compressor SUZUKI GRAND VITARA 2002 2.G Service Workshop Manual

YH4
GRAND
VITARA
J20
J20
1. 100 N, 10 kg or 22 lb
2. Fan pulley3. Crankshaft pulley
4. Adjusting and pivot bolt
0B-6 MAINTENANCE AND LUBRICATION
Water pump, generator, power steering and / or A / C
compressor (if equipped) drive belt (J20 engine)
Inspection
1) Disconnect negative cable at battery.
2) Inspect belt for cracks, cuts, deformation, wear and cleanliness.
If any of above conditions are found, replace.
Also, check belt for tension.
Tension indicator ªBº should be the right of indicator ªAº as
shown in figure. If indicator ªBº is found to the left of indicator ªAº,
replace generator belt.
Replacement
Replace belt referring to Section 6H for replacement procedure of
generator drive belt.
Engine cooling fan drive belt (J20 engine)
Inspection
1) Disconnect negative cable at battery.
2) Inspect belt for cracks, cuts, deformation, wear and cleanliness.
If any defect exists, replace. Check belt for tension.
Cooling fan belt tension
ªaº: 5 ± 7 mm (0.20 ± 0.27 in.) deflection under 100 N, 10 kg
or 22 lb pressure.
NOTE:
When replacing belt with a new one, adjust belt deflection
to 4 ± 5 mm (0.16 ± 0.19 in.).
3) If the belt is too tight or too loose, adjust it to specification by ad-
justing cooling fan pulley position.
4) Tighten adjusting bolt and pivot bolt.
5) Connect negative cable at battery.
Replacement
Replace belt referring to Section 6B for replacement procedure of
cooling fan drive belt.

YH4
GRAND
VITARA
G16 with P / S
G16 with P / S and A / C
H25 with P / S
H25 with P / S and A / C
1. Crankshaft pulley
2. P / S pump pulley
3. A / C compressor pulley
(if equipped)4. Tension pulley
5. Tension pulley bolts
MAINTENANCE AND LUBRICATION 0B-7
Power steering pump and / or A / C compressor drive belts (if
equipped) for G16 and H25 engines.
Inspection
1) Disconnect negative cable at battery.
2) Inspect belt for cracks, cuts, deformation, wear and cleanliness.
If any defect exists, replace.
Check belt for tension.
Power steering pump and / or A / C compressor drive belt
tension.
ªaº: 6 ± 9 mm (0.24 ± 0.35 in.) deflection under 100 N, 10 kg
or 22 lb pressure.
ªbº: 4 ± 7 mm (0.16 ± 0.28 in.) deflection under 100 N, 10 kg
or 22 lb pressure.
If belt tension is out of above specification, adjust it referring to
Section 1B or 3B1.
3) Connect negative cable to battery.
Replacement
Replace belt referring to Section 1B or 3B1 for replacement proce-
dure of belt.

YH4
GRAND
VITARA
1B
AIR CONDITIONING (OPTIONAL) 1B-1
GENERAL DESCRIPTION1B- 3 . . . . . . . . . . . . . .
Identification of Refrigerating System 1B- 3. . . .
Refrigerant Flow of Air Conditioning
System 1B- 4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Major Components and Location 1B- 5. . . . . . .
DIAGNOSIS1B- 6 . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 1B- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis of Abnormal Noise 1B- 8. . . . . . . . . .
Quickly Checking of Refrigerant Charge
(If Equipped with Sight Glass) 1B-10. . . . . . . . .
Compression System Diagnosis 1B-11. . . . . . . .
Performance Diagnosis 1B-12. . . . . . . . . . . . . . .
Wiring Circuit 1B-16. . . . . . . . . . . . . . . . . . . . . . . .
Inspection of A / C Controller and Its
Circuits 1B-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . REFRIGERANT RECOVERY,
EVACUATION AND CHARGING1B-23 . . . . . . . .
Operation Procedure for Charging A / C
with Refrigerant 1B-23. . . . . . . . . . . . . . . . . . . . .
Recovery 1B-24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuating 1B-25. . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 1B-26. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing Manifold Gauge Set 1B-29. . . . . . . . .
Leak-Testing Refrigerant System 1B-29. . . . . . .
Liquid Leak Detectors 1B-29. . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE1B-30 . . . . . . . . . . . . . . . .
Precaution 1B-30. . . . . . . . . . . . . . . . . . . . . . . . . . .
A / C Condenser Assembly 1B-33. . . . . . . . . . . . .
Condenser Cooling Fan Assembly 1B-35. . . . . .
SECTION 1B
AIR CONDITIONING (OPTIONAL)
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 autho-
rized SUZUKI dealer. Refer to ªAir Bag System Components and Wiring Location Viewº under ªGener-
al Descriptionº in air bag system section in order to confirm whether you are performing service on
or near the air bag system components or wiring. Please observe all WARNINGS and ªService Precau-
tionsº under ªOn-Vehicle Serviceº 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
ªLOCKº 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 CFC-12 (R-12) and the other using refrigerant HFC-134a (R-134a).
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 the description in page 1B-2.
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.
For basic servicing method of the air conditioning system that is not described in this section, refer to AIR CONDI-
TIONING BASIC MANUAL (99520-02130).
CONTENTS

YH4
GRAND
VITARA
1B-2 AIR CONDITIONING (OPTIONAL)
Condenser Dryer (Receiver / Dryer) 1B-36. . . . . .
Air Filter Element 1B-37. . . . . . . . . . . . . . . . . . . . .
Cooling Unit (Evaporator) 1B-39. . . . . . . . . . . . . .
Expansion Valve 1B-42. . . . . . . . . . . . . . . . . . . . .
A / C Evaporator Thermistor (Evaporator
Temperature Sensor) 1B-43. . . . . . . . . . . . . . . .
Refrigerant Pipes and Hoses 1B-44. . . . . . . . . . .
A / C Switch 1B-45. . . . . . . . . . . . . . . . . . . . . . . . . .
A / C Controller 1B-46. . . . . . . . . . . . . . . . . . . . . . . .
Dual Pressure Switch 1B-47. . . . . . . . . . . . . . . . . A / C Compressor Relay and A / C
Condenser Cooling Fan Relay 1B-48. . . . . . . .
Compressor Assembly 1B-49. . . . . . . . . . . . . . . .
Magnet Clutch Assembly
(For Denso Compressor) 1B-53. . . . . . . . . . .
Magnet Clutch Assembly
(For Seiko Seiki Compressor) 1B-56. . . . . . .
Lip Type Seal (For Seiko Seiki) 1B-59. . . . . . .
REQUIRED SERVICE MATERIAL1B-61 . . . . . . . .
SPECIAL TOOLS1B-61 . . . . . . . . . . . . . . . . . . . . . .

YH4
GRAND
VITARA
1. Compressor label
2. Service valve SEIKO SEIKI DENSO
AIR CONDITIONING (OPTIONAL) 1B-3
GENERAL DESCRIPTION
The air conditioning system of this model differs by the country of origin (the production plant.).
One is Japan (IWATA) produced, other one is Canada (CAMI) produced.
For the details of the identification, please refer to IDENTIFICATION INFORMATION of Section 0A in this manual.
The compressor used of Japan (IWATA) produced vehicle is made of SEIKO SEIKI and the compressor used of
Canada (CAMI) produced vehicle is made of DENSO.
IDENTIFICATION OF REFRIGERATING
SYSTEM
Whether the A / C equipped with the vehicle being serviced uses re-
frigerant R-134a or R-12 is indicated on the LABEL installed the
compressor.
Also, it can be identified by the shape of the service (charge) valve.
The compressor manufacturer, it can be identified by the LABEL on
compressor body.

YH4
GRAND
VITARA
1. Compressor
2. Magnet clutch
3. Condenser assembly
4. Receiver / dryer
5. Dual pressure switch
6. Expansion valve
7. Evaporator: Liquid
: Vapor
: Superheated vapor
1B-4 AIR CONDITIONING (OPTIONAL)
REFRIGERANT FLOW OF AIR CONDITIONING SYSTEM

YH4
GRAND
VITARA
1. Cooling unit
2. Compressor
3. Condenser assembly
4. Receiver / dryer
5. Discharge hose
6. Suction hose
7. Condenser outlet pipe
8. Liquid pipe9. Expansion valve
10. Ventilation air
11. Foot air
12. Defroster air
13. Demister air
14. Fresh air
15. Recirculation air
16. Heater unit17. Air inlet box
18. Dual pressure switch
19. Low pressure charge valve
20. High pressure charge valve
21. Suction pipe
22. Sight glass
CAMI PRODUCTION VEHICLE IWATA PRODUCTION VEHICLE
AIR CONDITIONING (OPTIONAL) 1B-5
MAJOR COMPONENTS AND LOCATION

YH4
GRAND
VITARA
1B-6 AIR CONDITIONING (OPTIONAL)
DIAGNOSIS
GENERAL
ConditionPossible CauseCorrection
Cool air won't come out
(A / C system won't
operative)
No refrigerant

Fuse blown

A / C switch faulty

Blower motor switch faulty

A / C thermistor faulty

Dual pressure switch faulty

Wiring or grounding faulty

A / C ON permission signal in ECM
faulty

A / C controller and its circuit faultyRecover, evacuation and charging.
Check ªIG METERº fuse, ªREAR DEFGº
fuse, and ªA / C FUSEº and check for
short circuit to ground.
Check A / C switch.
Check blower motor switch.
Check A / C evaporator thermistor.
Check dual pressure switch.
Repair as necessary.
Check ON permission signal.
Check A / C controller and its circuit.
Cool air won't come out
(A / C compressor won't
operative)
Magnet clutch faulty

Compressor relay faulty

Compressor thermal switch faulty
(if equipped)

Drive belt loose or broken

Compressor faulty

A / C ON permission signal in ECM
faulty

A / C controller faultyCheck magnet clutch.
Check compressor thermal switch.
Check compressor relay.
Adjust or replace drive belt.
Check compressor.
Check ON permission signal.
Check A / C controller.
Cool air won't come out
(A / C condenser cooling
fan motor won't
operative)
Condenser cooling fan relay faulty

Wiring or grounding faulty

ªA / C condenser cooling fan relayº
signal in ECM faulty

Condenser cooling fan motor faultyCheck condenser cooling fan relay.
Repair as necessary.
Check A / C condenser cooling fan relay
signal.
Check condenser cooling fan motor.
Cool air won't come out
(Blower motor won't
operative)
Fuse blown

Blower motor relay faulty

Blower motor resistor faulty

Blower motor switch faulty

Wiring or grounding faulty

Blower motor faultyCheck ªHEATER FUSEº, ªREAR DEFGº
fuse and check for short circuit to
ground.
Check blower motor relay.
Check blower motor resistor.
Check blower motor switch.
Repair as necessary.
Check blower motor.
Cool air won't come out
or insufficient cooling
(A / C system normal
operative)
Insufficient or excessive charge of
refrigerant

Refrigerant leak in system

Condenser clogged

A / C evaporator clogged or frosted

A / C thermistor faulty

A / C controller faulty

Expansion valve faulty

Drive belt slipping

Magnetic clutch faultyCheck charge of refrigerant.
Check system for leaks.
Check condenser.
Check A / C evaporator.
Check A / C thermistor.
Check A / C controller.
Check expansion valve.
Check or replace drive belt.
Check magnetic clutch.

YH4
GRAND
VITARA
AIR CONDITIONING (OPTIONAL) 1B-7
ConditionPossible CauseCorrection
Cool air does not come
out or insufficient
cooling (A / C system
normal operative)
Compressor faulty

Air in A / C system

Air leaking from cooling unit or air
duct

Heater and ventilation system faulty

Blower motor faulty

Excessive compressor oil existing in
A / C systemCheck compressor.
Replace condenser dryer, and
evacuation and charging.
Repair as necessary.
Check blower unit.
Check heater control lever assembly.
Check heater assembly.
Check blower motor.
Pull out compressor oil in A / C system
circuit, and replace compressor.
Cool air does not comes
out only intermittently
Wiring connection faulty

Expansion valve faulty

Excessive moisture in A / C system

A / C controller faulty

Magnetic clutch faulty

Excessive charge of refrigerantRepair as necessary.
Check expansion valve.
Replace condenser dryer, and
evacuation and charging.
Check A / C controller.
Check magnetic clutch.
Check charge of refrigerant.
Cool air comes out only
at high speeds
Condenser clogged

Insufficient charge of refrigerant

Air in A / C system

Drive belt slipping

Compressor faultyCheck condenser.
Check charge of refrigerant.
Replace condenser dryer, and
evacuation and charging.
Adjust or replace drive belt.
Check compressor.
Cool air does not comes
out only at high speeds
Excessive charge of refrigerant

A / C evaporator frostedCheck charge refrigerant.
Check A / C evaporator.
Check A / C thermistor.
Insufficient velocity of
cooled air
A / C evaporator clogged or frosted

Air leaking from cooling unit or air
duct

Blower motor faulty

Wiring or grounding faultyCheck A / C evaporator.
Repair as necessary.
Check blower motor.
Repair as necessary.

YH4
GRAND
VITARA
1B-8 AIR CONDITIONING (OPTIONAL)
DIAGNOSIS OF ABNORMAL NOISE
There are various types of noise, ranging from those produced in the engine compartment to those from the pas-
senger compartment, also from rumbling noises to whistling noises.
ABNORMAL NOISE FROM COMPRESSOR
ConditionPossible CauseCorrection

During compressor operation, a
rumbling noise is heard
proportional to engine
revolutions.
Inadequate clearance in piston
area (piston or swash-plate).
Repair or replace compressor as
necessary.

A loud noise is heard at a certain
rpm, disproportionately to engine
revolution.
Loose or faulty V-belt.

Loose mounting bolts.
Adjust V-belt tension, or
replace belt.

Retighten mounting bolts.

A loud rattle is heard at low
engine rpm.
Loose compressor center bolt.
Retighten center bolt.

Replace compressor if it was
operated in this condition for a
long time.
ABNORMAL NOISE FROM MAGNETIC CLUTCH
ConditionPossible CauseCorrection

A rumbling noise is heard when
compressor is not operating.
Worn or damaged bearings.
Replace bearings.

A chattering noise is heard when
compressor is engaged.
Faulty clutch gap (excessive).

Worn clutch friction surface.

Compressor oil leaked from shaft
seal, contaminating the friction
surface.
Adjust clutch gap.

Replace clutch.

Replace compressor shaft oil
seal.
ABNORMAL NOISE FROM TUBING
ConditionPossible CauseCorrection

A droning noise is heard inside
vehicle, but not particularly
noticeable in engine
compartment.
Faulty tubing clamps.

Resonance caused by pulsation
from variations in refrigerant
pressure.
Reposition clamps or increase
the number of clamps.

Attach a silencer to tubing, or
modify its position and length.
ABNORMAL NOISE FROM CONDENSER
ConditionPossible CauseCorrection

Considerable vibration in
condenser.
Resonance from condenser
mounting stay and body.
Firmly insert a silencer between
condenser mounting stay and
body.