1987 SUZUKI GRAND VITARA Service Repair Manual

3-speed typer __-- - ---- - ---- ~-*
Fig. 21-12
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OFF
IN1
LOW
MAINTENANCE
1) Wiper trouble diagnosis
When wiper motor does not start even if
Wiper Switch is turned “ON”, check lead
connections and coupler connections. Then,
check the following.
a) Fuse blown or mounted incorrectly.
b) Wiper switch:
To check wiper switch: remove couplers
and check continuity between following
terminals by using circuit tester.
Switch connector
14.Yellow/White15.Blue16.Blue/Red17.Blue/Black18.Black
18.Blue/White
2-speed type
Yellow/whiteBlueBlue/redBlue/white
High speed0a
Low speed0l
OFFel
Wiper switch
3-speed type
OFF
Interval
Yellowl Blue/whitewhite Blue “lr”,“d/ rzay Black
1.Battery2.Main switch3.Fuse box4.Wiper motor5.Wiper & washer switch6.Washer motor
Wire colorB: BlackB/B1 : Black/BlueBI : BlueBIIR : Blue/RedBI/W: Blue/WhiteY/B1 : Yellow/Blue
2
L
+
A‘U
c) Break in wiper motor armature or poor
commutator brush contact:
To check these, check continuity between
Blue lead and ground, and Blue/Red wire
and ground respectively.
2) No-load run test
As shown in Fig. 21-13, using a 12V battery,
connect positive battery terminal to Blue
terminal and the negative terminal to motor.
If motor rotates at 45 - 57 r/min, this is
acceptable (for Lowspeed check). For High-
speed check, connect the positive terminal to
Blue/Red terminal and negative terminal to
motor. If motor rotates at 67 - 81 r/min,
this is acceptable.
Fig. 21-13 Testing motor
1. Positive terminal
2. Negative terminal
Wiper switch21-10

3) Automatic stop action test
Connect yellow terminal of motor to positive
@ battery terminal, and put a jumper
between Blue/White (Blue/Black) and Blue
terminals to see if motor output shaft comes
to a halt at a certain, not just any, angular
position. That position corresponds to start-
ing position of the blade. Using jumper,
stop motor a number of times to make sure
that motor stops at the same position each
time.
Fig. 21-14 Testing motor
1. Positive terminal
2. Negative terminal
3. Put a jumper between
Blue/White (Blue/Black) and Blue
4) Internal wiper relay test
1. Disconnect wiper & washer switch coupler.
2. Turn wiper switch to “I NT” position.
3. Connect positive battery terminal to
Yellow/White coupler terminal and nega-
tive battery terminal to Black terminal.
If an operating sound is heard, the relay is
at work properly.
Switch connector
14.Yellow/White
15.Blue16.Blue/Red17.Blue/Black
18.Black19.Blue/White
21-5. WATER TEMPERATURE METER
AND GAUGE
The water temperature meter is located in the
combination meter and its gauge unit on the
inlet manifold.
The gauge unit shows different resistance values
depending on the coolant temperature. This
causes a current f lowing through the temperature
meter coil to change, controlling the meter
pointer. That is, when the coolant temperature
is raised, the gauge unit resistance is decreased
with more current flowing through the meter
coil, raising the meter pointer upward from the
“C” position.
INSPECTION
[Water temperature meter]
1.
2.
3.
Disconnect Y/W (Yellow/White) lead wire
going to gauge unit installed to intake mani-
fold.
Use a bulb (12V 3.4W) in position to ground
above wires as illustrated.
Turn main switch ON, Confirm that the bulb
is lighted and meter pointer fluctuates several
seconds thereafter.
If meter is faulty, replace it.
1. Battery2. Water temperature meter
3. Test lamp (12V. 3.4W)YIW: Yellow/WhiteFig. 21-16
Fig. 21-1521-11

[Gauge unit] 21-6. FUEL LEVEL METER AND GAUGE
Warm up gauge unit. Thus make sure its resis-
tance is decreased with increase of temperature.
Temperature and resistance relationship can be
plotted in a graph as shown below.
The fuel level meter circuit consists of the fuel
level meter installed inside the combination
meter and the fuel level gauge installed to the
fuel tank.
Fig. 21-17
wTemp.
Fig. 21-18 Resistance- Temp. Relationship
Temperature
50°C (122°F)
80°C (176°F)
100°C (212°F)
Resistance
133.9 -178.9 f-i
47.5-56.8 !a
26.2 -29.3 52
Current flowing through the meter coil is
changed to control the meter pointer. That is,
when fuel is full, the fuel level gauge unit
resistance is decreased with more current flowing
into the meter coil, causing the meter pointer
to point at the “F” position.
INSPECTION
[Fuel level meter]
1. Disconnect Y/R (Yellow/Red) lead wire
going to gauge unit.
2. Use a bulb (12V 3.4W) in position to ground
above lead wire as illustrated.
3. Turn ignition switch ON.
Make sure the bulb is lighted and meter
pointer fluctuates several seconds thereafter.
If meter is faulty, replace it.
Fig. 21-191. Battery2. Fuel level meter
3. Test lamp (12V. 3.4%‘)YR : Yellow/Red
NOTE:
Wind sealing tape on screw threads of gauge
before installing gauge to intake manifold.
21-12

[Gauge unit]21-7. BRAKE WARNING LAMP
Use ohmmeter to confirm that level gauge unit
changes in resistance with change of the float
position. Float position-to-resistance relation-
ship can be plotted in a graph as shown below.
The brake warning lamp system consists of the
brake fluid level switch installed to the master
cylinder reservoir and the lamp inside the
combination meter.
This circuit includes a parking brake switch
which gives a warning for unreleased parking
brake.
F-E
Fig. 21-20 Resistance-Fuel Level Relationship
Fig. 21-21
F : Full
E : Empty
OPERATION
Brake fluid level warning lamp circuit consists of
brake fluid level switch installed in master
cylinder reservoir, brake fluid level warning lamp
in gage cluster and check relay.
Also, this circuit is additionally provided with
parking brake switch which warns that parking
brake is applied.when engine is stopped,
warning lamp comes on, if ignition switch is
turned ON and parking brake is applied.
For bulb check, warning lamp comes on briefly
during engine starting regardless of brake fluid
level position and parking brake operation.
Because point of check relay is closed.
After engine is started, release parking brake.
If lamp gose off, brake fluid level is adequate.
When warning lamp dose not operate, use circuit
diagram as reference to check bulb, wiring, etc.
r---i
check relayl-2-l
B/Y : Black/Yellow1. Fluid level switch
R/B : Red/Black2. Warning lamp
B: Black3. Parking brake switch
B/W : Black/White4. Main switch
B/BI : Black/Blue5. Battery
Fig. 27-22
21-13

INSPECTION21-8. OIL PRESSURE LAMP
[Brake fluid level switch]
Use ohmmeter to check switch for resistance
and continuity.
If found defective, replace switch.
The oil pressure lamp circuit consists of the oil
pressure switch installed to the cylinder block
and the lamp (warning lamp) inside the combi-
nation meter.
The oil pressure switch so operates that it is
switched OFF when oil pressure is produced by
the started engine and then fed to switch.
Fig. 21-23W/R : White/Red
6 : Black
RI0 : RedlBlack
1. Battery
2. Main switch
3. Fuse4. Oil pressure lamp
6. Oil pressure switch
B/El : Black/Blue
B/W : Black/White
Y/0 : Yellow/Black
W/Y : White/Yellow
Fig. 21-24
INSPECTION
[Oil pressure switch]
Use a ohmmeter to check the switch continuity.
During engine
Running
No continuity
obtained (- 52 1
IAt Engine StopContinuity obtained
(052)
1. To wiring harness
2. Cylinder block
Fig. 21-2521-14

21-9. 4 WHEEL DRIVE LAMP21-10. SEAT BELT WARNING LAMP/
BUZZERThe 4 wheel drive lamp circuit consists of the 4
wheel drive indicator lamp switch installed to
the transfer and the lamp inside the combination
meter.
The 4WD switch so operates that it is switched
ON when transfer gear shift control lever is
shifted to “4H” or “4L” position.
The seat belt warning lamp/buzzer circuit is a
system to light and sound the lamp and buzzer
respectively for several seconds, urging the
driver to wear his seat belt. After several seconds
passed, the lamp goes OFF and the buzzer stops
sounding whether the seat belt is worn or not.
1.BatteryB/B1:Black/Blue2.Main switchB/W:Black/White3.FuseBI/B:Blue/Black4.4WD lampW/Y:White/Yellow5.4WD switch
Fig. 21-26
INSPECTION
[4WD switch]
Use a ohmmeter to check the switch continuity.
I
“4H” or “4L”Continuity obtained
oosition(052)I
I
#,2HM or ##N## positionNO continuity
obtained (- 52 1I
CL-
01
8
4\II
B/W
1. Battery
2. Main switch3. Fuse
4. Combination mater
5. Warning lamp
6. Warning buzzer7. Bi-metal8. Warning switch
W/Y:White/Yellow
BIBI:Black/BlueB/W:Black/White
Or:Orange
Fig. 21-28
INSPECTION
When the warning lamp/buzzer do not make
lighting/sounding, use the above Circuit Diagram
as reference to check the bulb, buzzer, wiring,
etc.
1. 4WD switch
2. Transfer
Fig. 21-2721-15

21-11. MAIN SWITCH KEY WARNING21-13. REAR DEFOGGER (OPTIONAL
BUZZERFOR HARD TOP MODEL)
The main switch key warning buzzer circuit is a
system to sound the buzzer if the driver leaves
the car with the main switch key inserted in
place, urging him to take it out of place.
1. Battery 4.MainswitchW/Y:White/Yellow
2. Fuse 5.DoorswitchW:White
3. Buzzer
Fig. 21-29
INSPECTION
If the main switch key warning buzzer does not
sound, use the above Wiring Diagram as reference
to check the buzzer.
21-12. ILLUMINATION CONTROLLER
INSPECTION
Use a test lamp to wire as illustrated below.
Make sure that the illumination controller knob
is turned rightwise to brighten the test lamp,
leftwise to darken it.
1. Battery
Fig. 21-30
2. Illumination controller
3. Test lamp (12V, 3.4W)
The Defogger circuit for the rear window glass
heating wires is as follows:
1.
2.
3.
4.
5.
6.
Defogger switchY/G : Yellow/Green
Main switchB: Black
Fusible linkR: Red
BatteryR/Y : Red/Yellow
Rear window glass withR/G : Red/Greenembeded heating wire
To illumination controller
Fig. 21-31
To check function of Defogger Switch, check
continuity between Yellow/Green wire and Red
wire when Defogger Switch is “ON”
Defogger switch
YIG RBR/Y RIG
Fig. 21-32
Y/G : Yellow/GreenR: Red
B: BlackR/Y : Red/Yellow
R/G : Red/Green
21-16

DEFOGGER WIRE
NOTE:
When cleaning the rear window glass, use a
dry cloth to wipe it along the wire direction.
When cleaning the glass, do not use detergent
or abrassive-containing glass cleaner.
When measuring wire voltage, use a tester
with the negative probe wrapped with a tin
foil which should be held down on the wire
by finger pressure.
1. Heat wire2. Tin foil
3. Tester probe
Fig. 21-33 NOTE:
1) Checking wire damage
a) Turn the main switch ON.
b) Turn the defogger switch ON.
c) Use a voltmeter to check the voltage at the
center of each heat wire, as illustrated.
At center
Good
Broken wire
B.roken wire
1. Voltmeter
Fig. 21-34
If the obtained voltage is lOV, the wire must be
damaged between its center and positive end. If
the voltage is zero, the wire must be damaged
between its center and earth.
2) Checking wire for damaged place
a) Set the voltmeter positive (+) lead to the
heat wire positive terminal end.
b) Set the voltmeter negative (-) lead with a
foil strip to the heat wire positive terminal
end to then move it along the wire to the
negative terminal end.
c) The place which causes the voltmeter to
fluctuate from zero to several volts is a
damaged place.
Several volts -_(( (
Fig. 21-35
If the heat wire is free from damage, the volt-
meter should point 12V at the heat wire positive
terminal end with its indication gradually
decreased toward zero to thus equal 0V at the
other terminal (earth) end.
REPAIR
[Defogger circuit]
1) Use white gasoline for cleaning.
2) Apply a masking tape at both the upper and
lower sides of a heat wire to be. repaired.
1. Mas
2. Wood spatula
3. Broken wire4. Repair agent
Fig. 21-36
3) Apply commercially-available repair agent
with a fine-tip brush.
4) Two to three minutes later, remove the
masking tapes previously applied.
5) Leave the repaired heat wire as it is for at
least 24 hours before operating the defogger
again.
21-17