Oli SUZUKI GRAND VITARA 2000 2.G Service Owner's Manual

YH4
GRAND
VITARA
AIR CONDITIONING (OPTIONAL) 1B-17
1. Blower motor main relay
2. Blower motor
3. Blower motor resistor
4. Blower motor switch
5. A / C controller
6. ECM
7. Heater mode control switch
8. Evaporator temperature sensor
9. Refrigerant pressure switch
FOR RH VEHICLE
10. Compressor relay
11. Compressor
12. Condenser cooling fan relay
13. Condenser cooling fan
14. Fuse box
15. A / C fuse 25 A
16. Ignition switch
17. Main fuse box
18. Battery main fuse 80 A19. Battery
20. Generator
21. Ignition main fuse 60 A
22. Heater/A/C main fuse 60 A
23. Ignition / meter fuse 20 A
24. Rear defogger fuse 15 A
25. Heater fuse 30 A
26. Compressor thermal switch
(only IWATA production vehicle)

YH4
GRAND
VITARA
AIR CONDITIONING (OPTIONAL) 1B-21
TerminalWireCircuitMeasurement
groundNormal valueCondition
AC2-1L/YSensor groundGround to body
(Fig. A)± 0.4 ± 0 voltEngine running
1.5 volts
(3150
)Evaporator thermistor temperature at
approx. 15C (59F) with engine
running
AC2-2W/B
Evaporator
thermistor
temperature
(evaporator temp.
sensor) input
Ground to engine
(Fig. B)
2.62 volts
(6.311
)
Evaporator thermistor temperature at
approx. 1C (34F) with engine
running
* If the temperature is less than
approx. 1C, in this case
compressor and condenser fan
should be stop (come back at more
than approx. 2.5C (less than
5840
, 2.5 V))
H25
engine
E61-27 /
G16 J20Gr/W
Signal output to
A / C controller
(A / C ON
Ground to engine
(Fig C)
10 ± 14 volts
Required A / C ON (terminal AC-A13)
at engine running with normal
condition (refer to ªINSPECTION OF
ECM AND ITS CIRCUITº in Section
6E)
G16, J20
engines
E61-8
(
permission
signal)(Fig. C)
0 ± 1 volt
Except the above-mentioned with
engine running
In this case compressor should be
stop
H25
engine
E61-28 /
Y/B
Signal input from
A / C controller
Ground to engine
0 ± 1.5 voltsRequire A / C ON
G16, J20
engines
E61-17Y/B(A / C ON request
signal)
g
(Fig. C)
10 ± 14 voltsTurn off the A / C
H25
engine
E61-5 /
G16, J20
engines
E61-22
Y/L
A / C condenser
cooling fan relay
outputGround to engine
(Fig. C)0 ± 1 volt

Blower fan motor switch and A / C or
defroster position switch (see
NOTE) ON with engine running at
evaporator thermistor temperature
input more than approx. 2.5C (less
than 2.5 V (5840
)), refrigerant
pressure switch ON and signal
input from ECM ON

Engine coolant temperature sensor
more than 113C (236F) with
engine running
10 ± 14 voltsExcept the above-mentioned with
engine running
NOTE:
Defroster position switch circuit is equipped with LH vehicle only.

YH4
GRAND
VITARA
3
1B-34 AIR CONDITIONING (OPTIONAL)
5) Disconnect coupler from dual pressure switch (1).
6) Disconnect condenser outlet pipe (3).
7) Disconnect condenser cooling fan motor coupler (2).
8) Remove condenser with fan.
NOTE:
Be careful not to damage fins of condenser and radiator.
9) Remove A / C condenser cooling fan assembly from condenser.
INSTALLATION
Reverse removal sequence to install condenser, noting following
point.
1) When replacing condenser, add 20 to 30 cc of refrigerating oil
from compressor suction-side.
2) Evacuate and charge system according to previously-described
procedure.

YH4
GRAND
VITARA



1. Air flow
AIR CONDITIONING (OPTIONAL) 1B-35
CONDENSER COOLING FAN ASSEMBLY
INSPECTION

Remove condenser assembly (Refer to ªA / C CONDENSER AS-
SEMBLY REMOVALº in this section).

Check continuity between terminal to terminal as shown.
If check results are continuity, proceed to next operation check.
If not, replace.

Connect battery to condenser fan motor as shown, then check
that the condenser fan motor operates smoothly and specified
current.
Specified current: Maximum 12 A at 12 V

YH4
GRAND
VITARA
1
1. Ears1. Air flow
1B-38 AIR CONDITIONING (OPTIONAL)
CLEAN
Blow off dust by compressed air from air outlet side of the filter ele-
ment.
INSTALLATION
Reverse removal procedure for installation noting the followings:

Install filter into cooling unit directing arrow mark on its end face
to heater unit.

Enable air bag system after installation. Refer to ªENABLING AIR
BAG SYSTEMº in Section 10B.

YH4
GRAND
VITARA
AIR CONDITIONING (OPTIONAL) 1B-39
COOLING UNIT (EVAPORATOR)
REMOVAL
1) Disconnect negative (±) cable at battery.
2) Disable air bag system. Refer to ªDisabling Air Bag Systemº in
Section 10B.
3) Recover refrigerant by using recovery and recycling equipment.
Be sure to follow the instruction manual for the equipment.
The amount of compressor oil removed must be measured and
the same amount added to the system.
4) For G16 and J20 engine
Disconnect suction pipe (1), and liquid pipe (2) from evaporator
(cooling unit).
CAUTION:
As soon as above hose and pipe are disconnected, cap
opened fittings so that moisture and dust may not enter
cooling unit.
5) Remove blower motor unit. Refer to Section 1A ªHEATER AND
VENTILATIONº.
6) Disconnect thermistor wire coupler.
7) Remove cooling unit (evaporator).
DISASSEMBLY (FOR CAMI PRODUCTION VEHICLE)
1) Remove filter (2) from cooling unit (3) assembly by removing fil-
ter cover (1).
2) Remove screws (1) to separate evaporator upper and lower
cases from each other.

YH4
GRAND
VITARA
1
1B-40 AIR CONDITIONING (OPTIONAL)
3) Remove upper case (1) and remove evaporator (2) from lower
case (3).
4) Remove following components from evaporator.

Expansion valve (5)

Thermistor (evaporator temperature sensor) (4)
DISASSEMBLY (FOR IWATA PRODUCTION VEHICLE)
1) Remove filter (2) from cooling unit (3) assembly by removing fil-
ter cover (1).
2) Detach clamps (1) to separate evaporator upper and lower
cases from each other.
3) Remove upper case (1) and remove evaporator (2) from lower
case (3).
4) Remove following components from evaporator.

Expansion valve (5)

Thermistor (evaporator temperature sensor) (4)

YH4
GRAND
VITARA
AIR CONDITIONING (OPTIONAL) 1B-41
INSPECTION
1) Check evaporator fins for blockage. If found clogged, use com-
pressed air to clean the fins.
CAUTION:
Do not use water for cleaning of evaporator.
Be careful not to damage evaporator fins. If evaporator
fin is bent, straighten it by using a screwdriver or pair of
pliers. If any leakage is found from fitting or tube, repair
or replace evaporator.
2) Check inlet and outlet fittings for crack or scratch. Repair them
as required.
REASSEMBLY and INSTALLATION
1) Reverse removal and disassembly sequence to install cooling
unit, noting the following points.

Install uniformly the evaporator packing to dash panel hole for
expansion valve.

Adjust fresh air control cable, refer to ªHEATER CONTROL
LEVER ASSEMBLYº in Section 1A.
2) Enable air bag system. Refer to ªEnabling Air Bag Systemº in
Section 10B.
3) Evacuate and charge system. Refer to ªEVACUATINGº and
ªCHARGINGº in this section.
NOTE:
When the thermistor removed, it should be reinstalled in
original position.
If cooling unit or evaporator is replaced, pour 25 cc of refrig-
erating oil to compressor suction-side.

YH4
GRAND
VITARA
3. Pipe clamp
1B-42 AIR CONDITIONING (OPTIONAL)
EXPANSION VALVE
INSPECTION
Refer to ªTroubleshooting Procedure Using Manifold Gauge Setº in
this section.
REMOVAL
1) Recover refrigerant by using recovery and recycling equipment.
Be sure to follow the instruction manual for the equipment. The
amount of compressor oil removed must be measured and the
same amount added to the system.
2) Remove front grill.
3) Disconnect suction pipe (1), and liquid pipe (2) from evaporator
(Cooling unit).
CAUTION:
As soon as above hose and pipe are disconnected, cap
opened fittings so that moisture and dust may not enter
cooling unit.
4) Disconnect suction pipe, and liquid pipe from suction hose (1)
and condenser outlet pipe (2).
5) Remove pipe clamp then remove suction pipe and liquid pipe.
6) Remove expansion valve (1).
INSTALLATION
1) Reverse removal sequence to install expansion valve.
2) Evacuate and charge system. Refer to ªEVACUATINGº and
ªCHARGINGº in this section.

YH4
GRAND
VITARA
1. Evaporator thermistorTemperature
Resistance ( )


AIR CONDITIONING (OPTIONAL) 1B-43
A / C EVAPORATOR THERMISTOR
(EVAPORATOR TEMPERATURE SENSOR)
A thermistor is a temperature sensor to sense the temperature of
air discharged from evaporator. The electrical characteristic is
shown in the figure.
When temperature is lower than preset temperature, amplifier
makes magnet clutch turn off to prevent evaporator from frosting.
INSPECTION
Check resistance between A / C evaporator thermistor (1) termi-
nals.
If check results are as not specified, replace thermistor.
Sensor Temperature
Resistance
0
C, 32
F7.0 ± 7.7 k

25
C, 77
F2.1 ± 2.4 k

REMOVAL
Refer to ªCOOLING UNIT (EVAPORATOR)º in this section.
INSTALLATION
1) Reverse removal sequence to install thermistor.
2) Enable air bag system. Refer to ªENABLING AIR BAG SYS-
TEMº in Section 10B.
3) Evacuate and charge system. Refer to ªEVACUATINGº and
ªCHARGINGº in this section.