SUZUKI SWIFT 2000 1.G RG413 Service User Guide

0A-8 GENERAL INFORMATION
 Make sure that all parts used in reassembly are perfectly
clean.
When use of a certain type of lubricant, bond or sealant
is specified, be sure to use the specified type.
“A” : Sealant 99000-31150
 Be sure to use special tools when instructed.
Special Tool
(A) : 09917-98221
(B) : 09916-58210
 When disconnecting vacuum hoses, attach a tag
describing the correct installation positions so that the
hoses can be reinstalled correctly.
 After servicing fuel, oil, coolant, vacuum, exhaust or
brake systems, check all lines related to the system for
leaks.
 For vehicles equipped with fuel injection systems, never
disconnect the fuel line between the fuel pump and
injector without first releasing the fuel pressure, or fuel
can be sprayed out under pressure.
 When performing a work that produces a heat exceeding
80°C (176°F) in the vicinity of the electrical parts, remove
the heat sensitive electrical part(s) beforehand.

GENERAL INFORMATION 0A-9
 Use care not to expose connectors and electrical parts
to water which will be a cause of a trouble.
 Always be careful not to handle electrical parts (com-
puter, relay, etc.) in a rough manner or drop them.
PRECAUTIONS FOR CATALYTIC CONVERTER
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 INSTALLING MOBILE COMMUNICATION EQUIPMENT
When installing mobile communication equipment such as CB (Citizens-Band)-radio or cellular-tele-
phone, 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 har-
nesses.
 Do not run the antenna feeder parallel with other wire harnesses.
 Confirm that the antenna and feeder are correctly adjusted.

0A-10 GENERAL INFORMATION
PRECAUTION IN SERVICING FULL-TIME 4WD
VEHICLE
This full-time 4WD vehicle can not be converted to 2WD man-
ually.
Observe the following caution in servicing. Otherwise, front
wheels drive rear wheels or vise-versa and vehicle acci-
dents, drivetrain damage and personal injury may result.
 Never perform any of the following types of service
work.
[A] : Testing with 2-wheel chassis dynamometer, speed-
ometer tester or brake tester.
[B] : Driving front wheels, which are jacked up.
[C] : Towing under the condition where either front or
rear wheels can not rotate.
 When testing with 2-wheel chassis dynamometer,
speedometer tester or brake tester, be sure to make the
vehicle as front wheel drive by removing propeller shaft.
 When using On-vehicle type wheel balancing equipment
(1), be sure to jack up all four wheels, off the ground
completely and support vehicle with safety stands (2).
Be careful of the other wheels, which will rotate at the
same time.
 This vehicle should be towed under one of the following
conditions :
– With all wheels on a flatbed truck.
– With front or rear wheels lifted and a dolly under the
other wheels.

GENERAL INFORMATION 0A-11
PRECAUTIONS FOR ELECTRICAL CIRCUIT
SERVICE
 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.
 When connecting connectors, also hold connectors and
put them together until they lock securely (a click is
heard).

0A-12 GENERAL INFORMATION
 When installing the wiring harness, fix it with clamps so
that no slack is left.
 When installing vehicle parts, be careful so that the wir-
ing 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 elec-
tricity from your body can damage these parts.
 Never connect any tester (voltmeter, ohmmeter, or what-
ever) to electronic control unit when its coupler is dis-
connected. 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. Other-
wise, accurate measurements may not be obtained or
personal injury may result. If not specified, use a volt-
meter with high impedance (M
Ω/
Ω/Ω/ Ω/V minimum) or a digital
type voltmeter.

GENERAL INFORMATION 0A-13
 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).
 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.
ELECTRICAL CIRCUIT INSPECTION
PROCEDURE
While there are various electrical circuit inspection methods,
described 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

0A-14 GENERAL INFORMATION
When checking system circuits including an electronic control unit
such as ECM, TCM, ABS control module, etc., it is important to
perform 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
being 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 the following proce-
dure, check the wire harness for open circuit and poor con-
nection with its terminals. Locate abnormality, if any.
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.
1. Check contact tension by inserting and removing just for once.
1. Looseness of crimping
2. Open
3. Thin wire (single strand of wire)

GENERAL INFORMATION 0A-15
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 indi-
cated, there is an open circuit between terminals B-1 and C-
1 or an abnormality 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 cir-
cuit being checked, measure voltage between each terminal
and body ground.
a) If measurements were taken as shown in the figure 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. 5 V
B-1 and body ground : Approx. 5 V
A-1 and body ground : 0 V
b) 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. 5 V
B-1 and body ground : Approx. 5 V
A-1 and body ground : Approx. 3 V

0A-16 GENERAL INFORMATION
SHORT CIRCUIT CHECK (WIRE HARNESS TO
GROUND)
1) Disconnect negative (–) cable at battery.
2) Disconnect connectors at both ends of the circuit to be
checked.
3) Measure resistance between terminal at one end of circuit
(A-1 terminal in the 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.
INTERMITTENT AND POOR CONNECTION
Most intermittent are caused by faulty electrical connections or
wiring, 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 terminal contact. However, cleaning the terminal with
a sand paper or the like is prohibited.
Damaged connector body, exposing the terminals to mois-
ture and dirt, as well as not maintaining proper terminal ori-
entation with the component or mating connector. NOTE:
If the circuit to be checked is connected to other parts
(1), disconnect all connectors of those parts.
Otherwise, diagnosis will be misled.
1. To other parts

GENERAL INFORMATION 0A-17
Improperly formed or damaged terminals.
Check each connector terminal in problem circuits carefully
to ensure good contact tension by using the corresponding
mating terminal.
If contact tension is not enough, reform it to increase contact
tension or replace.
Poor terminal-to-wire connection.
Check each wire harness in problem circuits for poor con-
nection by shaking it by hand lightly. If any abnormal condi-
tion is found, repair or replace.
Wire insulation which is rubbed through, causing an intermit-
tent 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.
1. Check contact tension by inserting and removing just once.
2. Check each terminal for bend and proper alignment.