2002 SUZUKI GRAND VITARA Fuse immobilizer

YH4
GRAND
VITARA
8
BODY ELECTRICAL SYSTEM 8-1
SECTION 8
BODY ELECTRICAL SYSTEM
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 autho-
rized SUZUKI dealer. Refer to ªAir Bag System Components and Wiring Location Viewº under ªGener-
al Descriptionº in air bag system section in order to confirm whether you are performing service on
or near the air bag system components or wiring. Please observe all WARNINGS and ªService Precau-
tionsº under ªOn-vehicle Serviceº in air bag system section before performing service on or around
the air bag system components or wiring. Failure to follow WARNINGS 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
ªLOCKº 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).
WIRING SYSTEM
(Harnesses, Connectors, Fuses, Relay, Switches, Grounds, System Circuit Diagram)Section 8A . . . . . . .
LIGHTING SYSTEMSection 8B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTRUMENTATION AND DRIVER INFORMATIONSection 8C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WINDOWS, MIRRORS, SECURITY AND LOCKSSection 8D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMMOBILIZER CONTROL SYSTEMSection 8F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTENTS
GENERAL DESCRIPTION8-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cautions in Servicing8-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols and Marks8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Color Symbols8-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Joint Connector8-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Box and Relay8-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Diagram8-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

YH4
GRAND
VITARA
1. Tachometer
2. Speedometer
3. Fuel level meter
4. Water temperature meter
5. Turn signal pilot light (LH)
6. 4WD indicator (if equipped)
7. ABS warning light (if equipped)
8. Immobilizer warning light (if equipped)
9. CHECK ENGINE light
10. Turn signal pilot light (RH)11. AIR BAG warning light (if equipped)
12. O / D OFF light (A / T vehicle only)
13. Fasten seat belt light (if equipped)
14. High beam light
15. Oil pressure warning light
16. Charge warning light
17. Brake and parking brake warning light
18. POWER indicator light (A / T vehicle only)
19. Shift position indicator (A / T vehicle, if equipped)or
CHECK
ENGINEor
ABS
8C-2 INSTRUMENTATION / DRIVER INFORMATION
GENERAL DESCRIPTION
CAUTIONS IN SERVICING
Refer to Section 8.
SYMBOLS AND MARKS
Refer to Section 8.
WIRING COLOR SYMBOLS
Refer to Section 8.
ABBREVIATIONS
Refer to Section 8.
JOINT CONNECTOR
Refer to Section 8.
FUSE BOX AND RELAY
Refer to Section 8.
POWER SUPPLY DIAGRAM
Refer to Section 8.
COMBINATION METER

YH4
GRAND
VITARA
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-3
1
A1 A2 A3 A4
A5 A6 A9 A10A7 A8
1. Coil antenna
2. Immobilizer Control Module
3. ECM/PCM
4. Immobilizer diagnostic coupler
4-1. Diagnostic output terminal
4-2. Ground terminal
5. Malfunction indicator lamp
6. Main relay
7. Ignition switch
8. Fuse
9. Main fuse
-10. To #9-pin in Data link connector
-11. To #7-pin in Data link connector
-12. To ABS control module
-13. Immobilizer indicator lamp
(Vehicle not equipped with monitor coupler)
-14. Monitor coupler (Vehicle not equipped
with immobilizer indicator lamp)) Terminal arrangement of Immobilizer
Control Module coupler (Viewed from
harness side)
B/R
BI
BI/B
B/W
V/Y
BI/B
B/W
B
V/W
V/W
BI
R
SbI
B
V/G
V
B
R/Y WIRE
SYMBOLWIRE
COLORabcdefghijklmn
1. Ignition key with built-in
transponder
1
1. Coil antenna
opqr
IGNITION KEY
The ignition key for the immobilizer control system has a built-in
transponder. Each transponder in the key has an each transmitting
code (Transponder code). The code will transmitted from the key
via the coil antenna to Immobilizer Control Module when the ignition
switch is turned ON.
COIL ANTENNA
The coil antenna is installed to the steering lock assembly. As it is
energized by Immobilizer Control Module, it transmits the trans-
ponder code of the ignition key to Immobilizer Control Module.

YH4
GRAND
VITARA
8G-14 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
In cabin
-1. Main fuse
-2. Main relay
-3. Immobilizer Control Module
-4. Immobilizer diagnostic coupler
4-1. Ground terminal
4-2. Diagnostic output terminal
-5. To ECM / PCM
TABLE A DTC IS NOT OUTPUT FROM DIAGNOSTIC OUTPUT TERMINAL
STEPACTIONYESNO
1Check voltage between A3 terminal
and body ground with ignition switch
turned ON.
Is it 10 ± 14V?Go to Step 2.ª(f)º wire open.
21) Connect voltmeter between A5
terminal and body ground.
2) Does voltmeter indicator deflect?Go to Step 3.
Poor A3, A5 or A7 connection.

ª(h)º wire of A7 terminal open.

ª(m)º wire between A5 terminal and
diagnostic output terminal of immobi-
lizer diagnostic coupler short.
If wire and connections are OK, substi-
tute a known-good Immobilizer Control
Module and recheck.
NOTE:
After replacing with a known-good
Immobilizer Control Module, register
ECM/Immobilizer Control Module
code in ECM / PCM and Transponder
code and ECM/Immobilizer Control
Module code in Immobilizer Control
Module by performing procedure
described in ªProcedure after Immo-
bilizer Control Module Replace-
mentº section.
31) Connect voltmeter between diag-
nostic output terminal of immobiliz-
er diagnostic coupler and body
ground.
2) Is it possible to read DTC by check-
ing deflection of voltmeter indicator?ª(n)º wire of ground
terminal for immo-
bilizer diagnostic
coupler open.ª(m)º wire between A5 terminal and diag-
nostic output terminal of immobilizer
diagnostic coupler open.

YH4
GRAND
VITARA
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-15
1. Main fuse
2. Main relay
3. ECM/PCM
4. Immobilizer indicator lamp
(Vehicle not equipped with
monitor coupler) For G16 / J20 engine For H25 engine
G16 / J20 Engine
H25 Engine
TABLE B IMMOBILIZER INDICATOR LAMP CHECK
(IMMOBILIZER INDICATOR LAMP DOSE NOT LIGHT AT IGNITION
SWITCH ON)
STEPACTIONYESNO
11) Turn ignition switch ON.
Do other indicator / warning lights in
combination meter come ON?Go to Step 2.ªIGº fuse blown, main fuse blown,
ignition switch malfunction,
ªB / Wº circuit between ªIGº fuse
and combination meter or poor
coupler connection at
combination meter.
21) Turn ignition switch OFF and
disconnect connectors from ECM /
PCM.
2) Check for proper connection to ECM /
PCM at terminal E61-5 for G16 / J20
engine or E61-23 for H25 engine.
3) If OK, then using service wire, ground
terminal E61-5 for G16 / J20 engine or
E61-23 for H25 engine in connector
disconnected.
Does immobilizer indicator lamp turn on
at ignition switch ON?Substitute a known-
good ECM / PCM and
recheck.Bulb burned out or ª(b)º wire
circuit open.

YH4
GRAND
VITARA
8G-16 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
1. Main fuse
2. Main relay
3. ECM / PCM
4. Immobilizer indicator lamp
(Vehicle not equipped with
monitor coupler) For G16 / J20 engine For H25 engine
G16 / J20 Engine
H25 Engine
TABLE C IMMOBILIZER INDICATOR LAMP CHECK
(IMMOBILIZER INDICATOR LAMP REMAINS ON AFTER ENGINE
STARTS)
STEPACTIONYESNO
11) With ignition switch OFF, disconnect
couplers from ECM / PCM.
Does immobilizer indicator lamp turn ON
at ignition switch ON?ª(p)º wire shorted to
ground circuit.Substitute a known-good ECM /
PCM and recheck.

YH4
GRAND
VITARA
8G-18 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
12
3
4
1. Main fuse
2. Main relay
3. Immobilizer
Control Module
4. Coil antenna
5. To ECM / PCM 5 (a)
(f)(k)
(I)
DTC13 NO TRANSPONDER CODE TRANSMITTED OR COIL ANTENNA
OPENED/SHORTED
DESCRIPTION:
Immobilizer Control Module energizes the coil antenna when the ignition switch is ON and reads Transponder code
from the ignition key. When Immobilizer Control Module cannot read Transponder code from the ignition key even
when the coil antenna is energized, this DTC is set.
INSPECTION:
STEPACTIONYESNO
1Does ignition key being used have built-in trans-
ponder? (See Fig. 1)Go to Step 2.Replace ignition key with built-in trans-
ponder and follow ªDIAGNOSTIC
FLOW TABLEº again.
21) Disconnect coil antenna coupler with ignition
switch turned OFF.
2) Is there continuity between coil antenna cou-
pler terminals A and B?
(See Fig. 2)Go to Step 3.Coil antenna open.
3Measure resistance between terminals of coil an-
tenna coupler and body ground. (See Fig. 3)
Is it
(infinity)
?Go to Step 4.Coil antenna shorted to ground.
41) With coil antenna coupler disconnected, dis-
connect Immobilizer Control Module coupler.
2) Measure resistance between coil antenna ter-
minals of Immobilizer Control Module coupler.
(See Fig. 4)
Is it
(infinity)
?Go to Step 5.ª(k)º wire shorted to ª(l)ºwire.
5Measure resistance between terminal A1 of Im-
mobilizer Control Module coupler and body
ground.
(See Fig. 5)
Is it
(infinity)
?Go to Step 6.ª(k)º wire shorted to ground.
6Measure resistance between terminal A2 of Im-
mobilizer Control Module coupler and body
ground. (See Fig. 6)
Is it
(infinity)
?Go to Step 7.ª(I)º wire shorted to ground.
71) Connect coil antenna coupler.
2) Is there continuity between Immobilizer Con-
trol Module coupler terminals A1 and A2?
(See Fig. 7)Go to Step 8.
ª(k)º or ª(I)º wire open.

Poor coil antenna-to-coupler.

YH4
GRAND
VITARA
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-21
12
3
1. Main fuse
2. Ignition switch
3. Immobilizer
Control Module (g)
A4
DTC22 IGNITION SWITCH CIRCUIT OPEN / SHORT
DESCRIPTION:
Immobilizer Control Module monitors ignition signal when the ignition switch is ON. This DTC is set when no ignition
signal input is detected by Immobilizer Control Module.
INSPECTION:
STEPACTIONYESNO
1Check voltage between Immobilizer
Control Module coupler terminal A4
and body ground with ignition
switch turned ON.
(See Fig.1)
Is it 10 ± 14V?Poor A4 terminal connection.
If connection is OK, substitute a
known-good Immobilizer Control
Module and recheck.
NOTE:
After replacing with a know-good
Immobilizer Control Module,
register ECM/Immobilizer Control
Module code in ECM / PCM and
Transponder code and ECM/
Immobilizer Control Module code
in Immobilizer Control Module by
performing procedure described
in ªProcedure after Immobilizer
Control Module Replacementº
section.ª(g)º wire open or short.
Fig. 1 for Step 1
1
A4
1. Immobilizer Control Module