Vitara SUZUKI GRAND VITARA 1998 2.G Service User Guide

YH4
GRAND
VITARA
GENERAL INFORMATION 0A-11

When checking connection of terminals, check its male half
for bend and female half for excessive opening and both for
locking (looseness), corrosion, dust, etc.

Before measuring voltage at each terminal, check to make
sure that battery voltage is 11V or higher. Such terminal volt-
age check at low battery voltage will lead to erroneous diag-
nosis.

YH4
GRAND
VITARA
0A-12 GENERAL INFORMATION
1. Check for loose connectionSensor
ECM
Check contact tension by
Inserting and removing just for
once
1. Looseness of crimping
2. Open
3. Thin wire (Single strand of wire)
ELECTRICAL CIRCUIT INSPECTION
PROCEDURE
While there are various electrical circuit inspection methods, de-
scribed here is a general method to check its open and short circuit
by using an ohmmeter and a voltmeter.
OPEN CIRCUIT CHECK
Possible causes for the open circuit are as follows. As the cause is
in the connector or terminal in many cases, they need to be checked
particularly carefully.

Loose connection of connector

Poor contact of terminal (due to dirt, corrosion or rust on it, poor
contact tension, entry of foreign object etc.)

Wire harness being open
When checking system circuits including an electronic control unit
such as ECM, TCM, ABS control module, etc., it is important to per-
form careful check, starting with items which are easier to check.
1) Disconnect negative cable from battery.
2) Check each connector at both ends of the circuit being checked
for loose connection. Also check lock condition of connector if
equipped with connector lock.
3) Using a test male terminal, check both terminals of the circuit be-
ing checked for contact tension of its female terminal.
Check each terminal visually for poor contact (possibly caused
by dirt, corrosion, rust entry of foreign object, etc.).
At the same time, check to make sure that each terminal is
locked in the connector fully.
4) Using continuity check or voltage check procedure described in
the following page, check the wire harness for open circuit and
poor connection with its terminals. Locate abnormality, if any.

YH4
GRAND
VITARA
GENERAL INFORMATION 0A-13
2V voltage drop
Continuity Check
1) Measure resistance between connector terminals at both ends
of the circuit being checked (between A-1 and C-1 in the figure).
If no continuity is indicated (infinity or over limit), that means that
the circuit is open between terminals A-1 and C-1.
2) Disconnect the connector included in the circuit (connector-B in
the figure) and measure resistance between terminals A-1 and
B-1.
If no continuity is indicated, that means that the circuit is open
between terminals A-1 and B-1. If continuity is indicated, there
is an open circuit between terminals B-1 and C-1 or an ab-
normality in connector-B.
Voltage Check
If voltage is supplied to the circuit being checked, voltage check can
be used as circuit check.
1) With all connectors connected and voltage applied to the circuit
being checked, measure voltage between each terminal and
body ground.
If measurements were taken as shown in the figure at the left
and results were as listed below, it means that the circuit is open
between terminals B-1 and A-1.
Voltage Between:
C-1 and body ground: Approx. 5V
B-1 and body ground: Approx. 5V
A-1 and body ground: 0V
Also, if measured values were as listed below, it means that
there is a resistance (abnormality) of such level that corre-
sponds to the voltage drop in the circuit between terminals A-1
and B-1.
Voltage Between:
C-1 and body ground: Approx. 5V
B-1 and body ground: Approx. 5V
A-1 and body ground: Approx. 3V

YH4
GRAND
VITARA
0A-14 GENERAL INFORMATION
To other
parts
Other parts
To other
partsSHORT CIRCUIT CHECK (Wire harness to ground)
1) Disconnect negative cable from battery.
2) Disconnect connectors at both ends of the circuit to be checked.
NOTE:
If the circuit to be checked is connected to other parts, dis-
connect all connectors of those parts.
Otherwise, diagnosis will be misled.
3) Measure resistance between terminal at one end of circuit (A-1
terminal in figure) and body ground. If continuity is indicated, it
means that there is a short to ground between terminals A-1 and
C-1 of the circuit.
4) Disconnect the connector included in circuit (connector B) and
measure resistance between A-1 and body ground.
If continuity is indicated, it means that the circuit is shorted to the
ground between terminals A-1 and B-1.

YH4
GRAND
VITARA
1. Check contact tension by inserting and removing
just once.
2. Check each terminal for bend and proper alignment.
GENERAL INFORMATION 0A-15
INTERMITTENT AND POOR CONNECTION
Most intermittent are caused by faulty electrical connections or wir-
ing, although a sticking relay or solenoid can occasionally be at
fault. When checking it for proper connection, perform careful
check of suspect circuits for:

Poor mating of connector halves, or terminals not fully seated in
the connector body (backed out).

Dirt or corrosion on the terminals. The terminals must be clean
and free of any foreign material which could impede proper termi-
nal contact.
However, cleaning the terminal with a sand paper or the like is
prohibited.

Damaged connector body, exposing the terminals to moisture
and dirt, as well as not maintaining proper terminal orientation
with the component or mating connector.

Improperly formed or damaged terminals.
Check each connector terminal in problem circuits carefully to en-
sure good contact tension by using the corresponding mating ter-
minal.
If contact tension is not enough, reform it to increase contact ten-
sion or replace.

YH4
GRAND
VITARA
0A-16 GENERAL INFORMATION

Poor terminal-to-wire connection.
Check each wire harness in problem circuits for poor connection
by shaking it by hand lightly. If any abnormal condition is found,
repair or replace.

Wire insulation which is rubbed through, causing an intermittent
short as the bare area touches other wiring or parts of the vehicle.

Wiring broken inside the insulation. This condition could cause
continuity check to show a good circuit, but if only 1 or 2 strands
of a multi-strand-type wire are intact, resistance could be far too
high.
If any abnormality is found, repair or replace.
PRECAUTION FOR INSTALLING MOBILE
COMMUNICATION EQUIPMENT
When installing mobile communication equipment such as CB (Citi-
zens-Band)-radio or cellular-telephone, be sure to observe the fol-
lowing precautions.
Failure to follow cautions may adversely affect electronic control
system.

Keep the antenna as far away as possible from the vehicle's elec-
tronic control unit.

Keep the antenna feeder more than 20 cm (7.9 in.) away from
electronic control unit and its wire harnesses.

Do not run the antenna feeder parallel with other wire harnesses.

Confirm that the antenna and feeder are correctly adjusted.

YH4
GRAND
VITARA
G16 engine
J20 engine
H25 engine
M / T (Type1)
4-speed A / T M / T (Type2)
GENERAL INFORMATION 0A-17
IDENTIFICATION INFORMATION
BODY NUMBER
The vehicle body number is on the left side of instrument panel and
punched on the chassis inside the tire housing on the right front side.
It is possible to identify the country of origin (the production plant)
of the vehicle by the first three digits of the body number as shown
below.
JSAxxx Japan (Iwata) produced. . . . . . . . . . .
2S2xxx Canada (CAMI) produced. . . . . . . . . . .
ENGINE IDENTIFICATION NUMBER
The number is punched on the cylinder block.
TRANSMISSION IDENTIFICATION NUMBER
The number is located on the transmission case.

YH4
GRAND
VITARA
NOTE:
Air bag CAUTION / WARNING labels are attached on
the vehicle equipped with air bag system only.
Engine cooling
fan label
Radiator cap
labelAir bag labelEmission control label
(Australia only)
Air bag label
on sun visor
Transfer label
0A-18 GENERAL INFORMATION
WARNING, CAUTION AND INFORMATION LABELS
The figure below shows main labels among others that are attached to vehicle component parts.
When servicing and handling parts, refer to WARNING / CAUTION instructions printed on labels.
If any WARNING / CAUTION label is found stained or damaged, clean or replace it as necessary.

YH4
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VITARA
When using frame contact hoist:
1. Front lifting point
2. Rear lifting point
3. Front
GENERAL INFORMATION 0A-19
VEHICLE LIFTING POINTS
WARNING

When using frame contact hoist, apply hoist as shown (right and left at the same position). Lift up the
vehicle till 4 tires are a little off the ground and make sure that the vehicle will not fall off by trying to
move vehicle body in both ways. Work can be started only after this confirmation.

Before applying hoist to underbody, always take vehicle balance throughout service into consider-
ation. Vehicle balance on hoist may change depending of what part to be removed.

Make absolutely sure to lock hoist after vehicle is hoisted up.

Before lifting up the vehicle, check to be sure that end of hoist arm is not in contact with brake pipe,
fuel pipe, bracket or any other part.

YH4
GRAND
VITARA
1. Front differential housing
2. Rear axle
housing
When using floor jack:
Front
Rear
1. Safety stands
0A-20 GENERAL INFORMATION
In raising front or rear vehicle end off the floor by jacking, be sure
to put the jack against the center portion of the front suspension
frame or rear axle housing.
WARNING:

Never apply jack against suspension parts (i.e., stabilizer,
etc.) or vehicle floor, or it may get deformed.

If the vehicle to be jacked up only at the front or rear end,
be sure to block the wheels on ground in order to ensure
safety.
After the vehicle is jacked up, be sure to support it on
stands. It is extremely dangerous to do any work on the
vehicle raised on jack alone.
To perform service with either front or rear vehicle end jacked up,
be sure to place safety stands under chassis frame so that body is
securely supported. And then check to ensure that chassis frame
does not slide on safety stands and the vehicle is held stable for
safety's sake.