1987 SUZUKI GRAND VITARA heater

6) Loosen tensioner bolt and stud, and remove
belt from crank timing belt pulley and
camshaft pulley after pushing up tensioner
plate fully with finger as shown in Figure.
24 1
1.Timing belt
2.Tensioner plate3.Tensioner bolt4.Tensioner stud
Fig.6-14
8) Remove water pump assembly.
7) Remove timing belt tensioner, plate and
spring.
1. Water pump
Fig. 6- 15
6-3. INSPECTION OF COMPONENTS
Thermostat
1) Make sure that air bleed valve of thermostat
is clear. Should this valve be clogged, engine
would tend to overheat.
Fig. 6- 16
1. Air bleed valve
2) Check valve seat for some foreign matters
3) Check thermostatic movement of wax pellet
being stuck which prevent valve from
seating tight.
as follows:
Immerse thermostat in water, and heat
water gradually.
Check that valve starts to open at specifi-
cation temp.
If valve starts to open at a temperature
substantially below or above, thermostat
unit should be replaced with a new one.
Such a unit, if reused, will bring about
overcooling or overheating tendency.
1. Thermostat
2. Thermometer
Fig. 6- 173. Heater
6-7

7-1.
7-2.
7-3.
7-4.
SECTION 7
CAR HEATER
CONTENTS
DESCRIPTION.. . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .7-27-
ELECTRICAL CIRCUIT
HEATER SERVICES........................................7-4
REMOVAL AND INSTALLATION..............................7-5
......................................7-3
7-1

7-l. DESCRIPTION
The car heater is of a hot water type and operates quietly. The air is heated by the engine coolant and the
warm air is blown into the car interior by the blower motor. The blower motor is driven electrically, independent of engine speed, and operates effectively even when
the engine speed is low.
Fig. 7- 1
7-2

7-2. ELECTRICAL CIRCUIT
The circuit diagram (Fig. 7-2) shows how the blower motor is controlled. Turn the main switch to “ON”,
turn (slide) the blower switch lever on one step, and voltage is applied across the blower motor. The
current is small because of the resistor provided in the circuit (indicated as “blower motor resistance” in
the diagram).
Under this condition, the blower runs slowly. By turning (sliding) the blower switch lever fully, the full
battery voltage is applied across the blower motor, a large current flows and the blower motor runs at
full speed.
r-mm-1
ri
BlBl . .Black/Blue
LaBI . . . Blue
BIIW . .Blue/White
BUY . .Blue/Yellow
Y/G . .Yellow/Green
Heater blowerLa . . . Light green
Motor resistor
,,w~
motor
Heater blower switch
Fusible link
I
Fig. 7-2
7-3

7-3. HEATER SERVICES
Blower resistor
This resistor is on heater case. Check it for signs
of cracking or breakage and replace as necessary.
If blower motor will not run or when resistor is
replaced, check continuity between Blue/White
and Blue/Black terminals using a circuit tester.
I
Blower resistor
specificationSeveral ohms
Heater hoses
Check heater hoses for the connection con-
dition, breakage, cracks and other damage and
replace if necessary.
Fig. 7-4
Fig. 7-3
Blower switch
Using a circuit tester, check this switch for
circuit continuity:
III
II
I
OFF
BlackBlue/red Blue/YellowBlue
7-4

7-4. REMOVAL AND INSTALLATION
Removal
[Heater and blower motor]
1. Disconnect battery negative cable.
2. Drain cooling system.
WARNING:
To help avoid the danger of being burned, do
not remove the drain plug and the radiator
cap while the engine and radiator are still hot.
Scalding fluid and steam can be blown out
under pressure if the plug and cap are taken
off too soon.
Fig 7-51. Drain plug2. Radiator
3. Disconnect heater inlet and outlet hoses
from heater unit pipes.
4. Remove instrument panel ass’y with speedo-
meter ass’y as follows.
1) Take off horn pad and remove steering
wheel using special tool @.
2) If equipped with radio and cigarette lighter,
disconnect radio and cigarette lighter lead
wires, and pull out radio case with radio
and cigarette lighter after loosening case
stay screw, and remove radio case bracket.
3) Pull out ashtray and loosen ashtray plate
screws.
4) Disconnect front food opening cable from
lock ass’y.
5) Loosen panel box stay screw and hood
opening cable lock nut on back side of
panel box cover.
6) Disconnect lead wires to control lever at
the coupler and heater control cables.
7) Pull out lever knobs and plate, and loosen
lever case screws.
8) Remove defroster and side ventilator hoses.
9) Disconnect lead wires to speedometer and
switches installed instrument panel at the
couplers.
10) Disconnect speedometer cable from speedo-
meter.
11) Release wire harness clamps installed to
instrument panel.
12) Loosen screws securing instrument panel.
13) Remove instrument panel.
NOTE:
l Before removing, recheck to ascertain all
hoses, wire harness, cables and screws are
disconnected from instrument paneL
l When removing heater lever case which is
fitted in steering column holder, be very
careful not to damage it
5. Remove steering column holder after loosen-
ing front door open stopper screws.
Fig. 7-7Fig. 7-6@ Special tool (Steering wheel
remover 09944-360 10)
7-5

6. Disconnect heater blower motor and resistor
lead wires at the coupler.
7. Loosen heater case securing nut on the engine
room side.
4. When connecting heater hoses, route them
correctly making sure they are free from
twist.
Fig. 7-8
6. Remove heater ass’v.
Fig. 7-9
9. Remove heater blower motor.
Installation
Reverse the removal procedure for installation,
exercising care to the following.
1. Make definitely sure to insert holder plate
between holder and body,
2. When installing parts, be careful to prevent
wire harness from being caught between parts.
3. Clamp wire harness securely and make sure
that it does not contact sharp edge of any
part.
[For right hand steering vehicle]
Heater valve
Heater outlet hose
From intake inlet pipemanifold
[For left hand steering vehicle]
VTo waterFrom intakemanifoldinlet pipe
Fig. 7- 10
5. Refill the proper coolant. Refer to section 6.
7-6

NOTE:
Upon completion of all jobs, perform following
checks.
l Check to ensure that every joint of each
heater hose and pipe is free from leakage
of cooling water.
l Check to ensure that each control lever
operates smoothly and that car heater operates
correctly to each control lever position.
If found faulty, adjust by changing control
cable clamp position.
l Check to ensure that each wire harnessesI
are securely clamped.Ff- -r/g. 7-l 1
Heater & Ventilator Control Cable Routing
[For right hand steering vehicle]
6
1.Cool/hot cable2.Circ/fresh cable3.Room/def. cable4. Steering column holder
5.Car heater6. I Defroster hose
[For left hand’steering vehicle]
7-7