1999 SUZUKI GRAND VITARA body electrical

YH4
GRAND
VITARA
8-2 BODY ELECTRICAL SYSTEM
GENERAL DESCRIPTION
The body electrical components of this vehicle are designed to operate on 12 Volts power supplied by the battery.
The electrical system utilizes negative ground polarity.
CAUTIONS IN SERVICING
When performing works related to electric systems, observe follow-
ing cautions for the purpose of protection of electrical parts and pre-
vention of a fire from occurrence.

When removing the battery from the vehicle or disconnecting the
cable from the battery terminals for inspection or service works
on the electric systems, always confirm first that the ignition
switch and all the other switches have been turned OFF. Other-
wise, the semi-conductor part may be damaged.

When disconnecting cables from the battery, be sure to discon-
nect the one from the negative (±) terminal first and then the other
from the positive (+) terminal.

Reverse the above order when connecting the cables to the bat-
tery terminals.

When disconnecting connectors, never pull the wiring harnesses.
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).

YH4
GRAND
VITARA
BODY ELECTRICAL SYSTEM 8-3

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 har-
ness is not interfered with or caught by any other part.

To avoid damage to the harness, protect its part which may con-
tact against a part forming a sharp angle by winding tape or the
like around it.

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.

Always be careful not to handle electrical parts (computer, relay,
etc.) in a rough manner or drop them.

YH4
GRAND
VITARA
8-4 BODY ELECTRICAL SYSTEM

When performing a work that produces a heat exceeding 80C
in the vicinity of the electrical parts, remove the heat sensitive
electrical part(s) beforehand.

Use care not to expose connectors and electrical parts to water
which will be a cause of a trouble.

When using a tester for checking continuity or measuring voltage,
be sure to insert the tester probe from the wire harness side.
SYMBOLS AND MARKS
Refer to Section 8A.
ABBREVIATIONS
Refer to Section 8A.

YH4
GRAND
VITARA
Symbol
G : Green
G / Y : Green / Yellow G (Base Color)
G (Base Color)
Y (Stripe Color)G/Y
BODY ELECTRICAL SYSTEM 8-5
WIRE COLOR SYMBOLS
The wire color is abbreviated to the first (or first two) alphabet(s) of
each color.
There are two kinds of colored wire used in this vehicle. One is
single-colored wire and the other is dual-colored (striped) wire.
The single-colored wire uses only one color symbol (i.e. ªGº).
The dual-colored wire uses two color symbols (i.e. ªG / Yº). The first
symbol represents the base color of the wire (ªGº in the figure) and
the second symbol represents the color of the stripe (ªYº in the fig-
ure).
JOINT CONNECTOR (J / C)

Wiring of this vehicle employs joint connector (J / C) which divide
one wire into several different wires or combine several different
wires into one wire.

The joint connector is as shown in the figure.
FUSE BOX AND RELAY
Refer to Section 8A.

YH4
GRAND
VITARA
8-6 BODY ELECTRICAL SYSTEM
POWER SUPPLY DIAGRAM
Refer to Section 8A.

YH4
GRAND
VITARA
BODY SERVICE 9-63
KEY CODING
KEY USAGE AND IDENTIFICATION
Key is used for ignition and door lock cylinder. Keys are cut on both
edges to make them reversible.
Key identification is obtained from five character key code stamped
on key code tag. Using this key code, key code cutting combination
can be determined from a code list (available to owners of key cut-
ting equipment from suppliers).
If key codes are not available from records or tags, key code can
be obtained from the right hand door lock cylinder (if lock has not
been replaced). Lock cylinders supplied by the factory as service
parts are unmarked.
If original key is available, key code cutting combination can be de-
termined by laying key.
IGNITION SWITCH LOCK CYLINDER
Removal / Installation
See Section 3C1, ªAIR BAG STEERING WHEEL AND COLUMNº.
ELECTRICAL DIAGNOSIS
For ignition switch electrical troubleshooting, see Section 8, ªBODY
ELECTRICAL SYSTEMº.

YH4
GRAND
VITARA
(A)
10B-8 AIR BAG SYSTEM
INTERMITTENT AND POOR CONNECTIONS
Most intermittent are caused by faulty electrical connections or wir-
ing. When a check for proper connection is requested in a diagnos-
tic flow table, 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.
If any abnormality is found, repair or replace as a wire harness as-
sembly.
Check each connector terminal in problem circuits carefully to en-
sure good contact tension by using the corresponding mating termi-
nal included in the connector test adapter kit (special tool).
If contact tension is not enough, reform it to increase contact ten-
sion or replace.
Special Tool (Connector Test Adapter Kit)
(A): 09932-76010

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, change the wire harness as-
sembly or component parts with new ones.

YH4
GRAND
VITARA
7. SDM
7-1. ªAIR BAGº warning lamp driver circuit 4. ªAIR BAGº warning lamp in combination meter
5. ªAIR BAGº fuse in ªAIR BAGº fuse box
6. Connection detection pin 1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B: Air bag harness
10B-18 AIR BAG SYSTEM
TABLE B ± ªAIR BAGº WARNING LAMP DOES NOT COME ªONº (Page 1 of 2)
CAUTION:

When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).

When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.

When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
STEPACTIONYESNO
11) Set parking brake.
2) Note combination meter as ignition switch
is turned ON.
3) Does the ªBRAKEº indicator (warning lamp)
come ON?Go to step 2.ªB/Wº wire, ªIG.COIL
METERº fuse or J/B
(between ignition
switch and combination
meter) open or short to
ground.
21) With ignition switch OFF, disconnect SDM.
2) Check electrical connection check
mechanism (connection detection pin).
3) Is it in good condition?Go to step 3.Repair electrical
connection check
mechanism.
31) Disconnect SDM.
2) Check proper connection to SDM at
terminal ªA5º.
3) If OK then check voltage from ªA5º terminal of
SDM connector to body ground with ignition
switch ON.
4) Is it 9 V or more?Substitute a known-good
SDM and recheck.Go to step 4 on the
next page.