Suzuki Grand Vitara JB627. Manual - part 3

00-9 Precautions:

Precautions for Catalytic Converter

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For vehicles equipped with a catalytic converter, use
only unleaded gasoline and be careful not to let a large
amount of unburned gasoline enter the converter or it
can be damaged.
• Conduct a spark jump test only when necessary,

make it as short as possible, and do not open the
throttle.

• Conduct engine compression checks within the

shortest possible time.

• Avoid situations which can result in engine misfire

(e.g. starting the engine when the fuel tank is nearly
empty.)

Precaution for CAN Communication System

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• The loose (1) in the wire harnesses twist of the CAN

lines except around the connector (3) should be within
100 mm (3.9 in.). Refer to the wiring diagram for the
CAN lines discrimination. Excessively-loosed lines
may be influenced by the electric noise.

• Do not connect terminals of the CAN line using a

bypass wire (1). Otherwise, the CAN line may be
influenced by the electric noise.

Precautions for Electrical Circuit Service

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• When replacing a fuse, make sure to use a fuse of the

specified capacity. Use of a fuse with a larger capacity
will cause a damage to the electrical parts and a fire.

• When disconnecting and connecting coupler, make

sure to turn ignition switch OFF, or electronic parts
may get damaged.

• When disconnecting connectors, never pull the wiring

harness. Unlock the connector lock first and then pull
them apart by holding connectors themselves.

2. Controller

I4JA01000002-01

I4JA01000003-01

I2RH01010038-01

I2RH01010039-01

I2RH01010040-01

Precautions: 00-10

• When connecting connectors, also hold connectors

and put them together until they lock securely (a click
is heard).

• When installing the wiring harness, fix it with clamps

so that no slack is left.

• When installing vehicle parts, be careful so that the

wiring harness is not interfered with or caught by any
other part.

• To avoid damage to the harness, protect its part which

may contact against a part forming a sharp angle by
winding tape or the like around it.

• Be careful not to touch the electrical terminals of parts

which use microcomputers (e.g. electronic control unit
like as ECM, PCM, P/S controller, etc.). The static
electricity from your body can damage these parts.

• Never connect any tester (voltmeter, ohmmeter, or

whatever) to electronic control unit when its coupler is
disconnected. Attempt to do it may cause damage to
it.

• Never connect an ohmmeter to electronic control unit

with its coupler connected to it. Attempt to do it may
cause damage to electronic control unit and sensors.

• Be sure to use a specified voltmeter / ohmmeter.

Otherwise, accurate measurements may not be
obtained or personal injury may result. If not specified,
use a voltmeter with high impedance (M

Ω/V

minimum) or a digital type voltmeter.

• When taking measurements at electrical connectors

using a tester probe, be sure to insert the probe (2)
from the wire harness side (backside) of the
connector (1).

I2RH01010041-01

I2RH01010042-01

I2RH01010043-01

I2RH01010044-01

I3RM0A000004-01

I2RH01010046-01

00-11 Precautions:

• When connecting meter probe (2) from terminal side

of coupler (1) because it can’t be connected from
harness side, use extra care not to bend male
terminal of coupler of force its female terminal open
for connection.
In case of such coupler as shown connect probe as
shown to avoid opening female terminal.
Never connect probe where male terminal is
supposed to fit.

• 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 11 V or higher. Such
terminal voltage check at low battery voltage will lead
to erroneous diagnosis.

Precautions for Installing Mobile
Communication Equipment

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When installing mobile communication equipment such
as CB (Citizens-Band)-radio or cellular-telephone, be
sure to observe the following precautions.
Failure to follow cautions may adversely affect electronic
control system.
• Keep the antenna as far away as possible from the

vehicle’s electronic 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.

Air Bag Warning

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WARNING

For vehicles equipped with Supplemental
Restraint (Air Bag) System:
• Service on and around the air bag system

components or wiring must be performed
only by an authorized SUZUKI dealer. Refer
to “Air Bag System Components, Wiring
and Connectors Location in Section 8B” in
order to confirm whether you are
performing service on or near the air bag
system components or wiring. Please
observe all “WARNING”s and “Precautions
on Service and Diagnosis of Air Bag
System in Section 8B” before performing
service on or around the air bag system
components or wiring. Failure to follow
“WARNING”s could result in unintentional
activation of the system or could render
the system inoperative. Either of these two
conditions may result in severe injury.

• Technical service work must be started at

least 90 seconds after the ignition switch is
turned to the “LOCK” position and the
negative cable is disconnected from the
battery. Otherwise, the system may be
activated by reserve energy in the Sensing
and Diagnostic Module (SDM).

I2RH01010047-01

I2RH01010048-01

Precautions: 00-12

Discharge Headlight Warning

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WARNING

When performing service on and around the
discharge headlight, observe “Precautions
for Discharge Headlight Service (If Equipped)
in Section 9B”. Neglecting the warnings may
result in personal injury.

A/C System Caution

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CAUTION

The air conditioning system of this vehicle
uses refrigerant HFC-134a (R-134a).
None of refrigerant, compressor oil and
component parts is interchangeable between
two types of A/C: one using refrigerant CFC-
12 (R-12) and the other using refrigerant HFC-
134a (R-134a).
Be sure to check which refrigerant is used
before any service work including inspection
and maintenance. For identification between
these two types, refer to “A/C Refrigerant
Type Description in Section 7B”.
When replenishing or changing refrigerant
and compressor oil and when replacing
parts, make sure that the material or the part
to be used is appropriate to the A/C installed
in the vehicle being serviced.
Use of incorrect one will result in leakage of
refrigerant, damage in parts or other faulty
condition.

Fastener Caution

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CAUTION

When fasteners are removed, always reinstall
them at the same location from which they
were removed. If a fastener needs to be
replaced, use the correct part number
fastener for that application. If the correct
part number fastener is not available, a
fastener of equal size and strength (or
stronger) may be used. Fasteners that are not
reused, and those requiring thread-locking
compound, will be called out. The correct
torque value must be used when installing
fasteners that require it. If the above
procedures are not followed, parts or system
damage could result.

Suspension Caution

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CAUTION

• All suspension fasteners are an important

attaching part in that it could affect the
performance of vital parts and systems,
and/or could result in major repair
expense. They must be replaced with one
of the same part number or with an
equivalent part if replacement becomes
necessary. Do not use a replacement part
of lesser quality or substitute design.
Torque values must be used as specified
during reassembly to assure proper
retention of this part.

• Never attempt to heat, quench or

straighten any suspension part. Replace it
with a new part or damage to the part may
result.

Wheels and Tires Caution

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CAUTION

All wheel fasteners are important attaching
parts in that they could affect the
performance of vital parts and systems, and/
or could result in major repair expense. They
must be replaced with one of the same part
number or with an equivalent part if
replacement becomes necessary. Do not use
a replacement part of lesser quality or
substitute design. Torque values must be
used as specified during reassembly to
assure proper retention of all parts.
There is to be no welding as it may result in
extensive damage and weakening of the
metal.

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