1998 SUZUKI GRAND VITARA sensor

YH4
GRAND
VITARA
SYSTEM CIRCUIT
A. To heater fuse
B. To rear defogger fuse
C. To ignition / meter fuse
D. To A / C fuse
E. Only LH vehicle1. Blower motor relay
2. Blower motor
3. Blower motor switch
4. A / C switch
5. Deflloster position switch
6. Deflloster / foot position switch7. Dual pressure (refrigerant
pressure) switch
8. A / C thermistor (evaporator
temperature sensor)
9. Compressor relay
10. Compressor11. Condenser fan motor relay
12. Condenser fan motor
13. A / C controller
14. ECM
15. Compressor thermal switch
(only IWATA production vehicle)
TERMINAL ARRANGEMENT OF A / C CONTROLLER
TERMINAL ARRANGEMENT OF ECM FOR G16, J20 ENGINE
TERMINAL ARRANGEMENT OF ECM FOR H25 ENGINE
H25 engine
E61-27
G16, J20
engines
E61-8
H25 engine
E61-28
G16, J20
engines
E61-17
1919
19H25 engine
E61-5
G16, J20
engines
E61-22
AIR CONDITIONING (OPTIONAL) 1B-19

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
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
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.

YH4
GRAND
VITARA
3D-6 FRONT SUSPENSION
1. Strut tower bar
1. E-ring
1. Front wheel speed sensor harness clamp bolt
1. Strut bracket bolts
2. Lower arm
3. Jack
1. Strut support nuts
STRUT DAMPER
REMOVAL
1) Remove strut tower bar (if equipped).
2) Hoist vehicle, allowing front suspension to hang free.
3) Remove wheel.
4) Remove E-ring securing brake hose and take brake hose off
strut bracket as shown.
5) If equipped with ABS, remove front wheel speed sensor harness
clamp bolt.
6) Remove strut bracket bolts, then support lower arm with jack.
7) Remove strut support nuts.
Hold strut by hand so that it will not fall off.
8) Remove strut.

YH4
GRAND
VITARA
3D-8 FRONT SUSPENSION
1. Circlip
2. Washer
1. Wire
1. Front wheel
speed sensor
2. Harness clamp bolt
COIL SPRING
REMOVAL
1) Hoist vehicle, allowing front suspension to hang free.
2) Remove wheels.
3) Remove axle shaft drive flange (For 4WD vehicle).
4) Remove front drive shaft circlip and washer (For 4WD vehicle).
5) Remove caliper bolts and suspend caliper with a wire hook.
CAUTION:
Hang removed caliper with a wire hook so as to prevent
brake hose from bending and twisting excessively or be-
ing pulled.
Don't operate brake pedal with pads removed.
6) If equipped with ABS, remove harness clamp bolt and remove
front wheel speed sensor from knuckle.
CAUTION:

Do not pull wire harness when removing front wheel
speed sensor.

Do not cause damage to surface of front wheel speed
sensor and do not allow dust, etc. to enter its installa-
tion hole.
7) Remove brake disc.
NOTE:
If brake disc can not be removed by hand, use 8 mm bolts
as shown.

YH4
GRAND
VITARA
FRONT SUSPENSION 3D-11
1. Front wheel speed sensor
2. Bolt
1. Spring rubber
seat
2. Bump stopper2, (b)
1

Check that no foreign material is attached to sensor and rotor.
Install wheel speed sensor and its harness clamp.
Tightening Torque
(a): 10 N
.m (1.0 kg-m, 7.5 lb-ft)
(b): 23 N
.m (2.3 kg-m, 17.0 lb-ft)
CAUTION:

Do not pull wire harness or twist more than necessary
when installing front wheel speed sensor.

Fit harness grommet to inner fender securely.

Check that there is no clearance between sensor and knuckle.
BUMP STOPPER / SPRING RUBBER SEAT
REMOVAL
1) Remove coil spring. Refer to steps 1) to 15) of item ªCOIL
SPRING REMOVALº in this section.
2) Remove spring rubber seat.
3) Remove bump stopper, using special tool.
Special Tool
(A): 09941-66010
INSTALLATION
1) Tighten bump stopper to specified torque, using special tool.
Tightening Torque
(a): 50 N
.m (5.0 kg-m, 36.5 lb-ft)
2) Install spring rubber seat.
3) Install coil spring. Refer to item ªCOIL SPRING INSTALLATIONº
in this section.

YH4
GRAND
VITARA
3D-12 FRONT SUSPENSION
1. Lock washer
2. Screws 1. Axle shaft drive flange
WHEEL HUB (INCLUDED WHEEL BEARING)
REMOVAL
1) Hoist vehicle and remove wheel.
2) Remove axle shaft drive flange (4WD vehicle) or hub cap (2WD
vehicle).
3) If equipped with ABS, remove wheel speed sensor from knuckle
and harness clamp from strut.
4) Remove caliper bolt and suspend caliper.
CAUTION:
Hang removed caliper with a wire hook or the like so as to
prevent brake hose from bending and twisting excessively
or being pulled.
Don't operate brake pedal with pads removed.
5) Remove brake disc.
NOTE:
If brake disc can not be removed by hand, use 8 mm bolts as
shown.
6) Remove front wheel bearing lock washer by loosening 4 screws.
7) Remove front wheel bearing lock nut by using special tool.
Special Tool
(A): 09951-16050
8) Remove front wheel bearing washer.
9) Remove wheel hub component by hand.