2003 SUZUKI GRAND VITARA light system

YH4
GRAND
VITARA
LIGHTING SYSTEM 8B-11
REAR FOG LIGHT (IF EQUIPPED)
REAR FOG LIGHT SWITCH
INSPECTION
Check for continuity between terminals at each switch position
shown below. Hold the switch button (ON or OFF) pushed in during
checking switch.
NOTE:
Rear fog light lights up only when headlights (low or high
beams) or front fog lights (if equipped) are ON.
Rear fog lights turns OFF automatically when headlights or
front lights are turned OFF.

YH4
GRAND
VITARA
8C
INSTRUMENTATION / DRIVER INFORMATION 8C-1
GENERAL DESCRIPTION8C- 2 . . . . . . . . . . . . . .
Cautions in Servicing 8C- 2. . . . . . . . . . . . . . . . .
Symbols and Marks 8C- 2. . . . . . . . . . . . . . . . . . .
Wiring Color Symbols 8C- 2. . . . . . . . . . . . . . . . .
Abbreviations 8C- 2. . . . . . . . . . . . . . . . . . . . . . . .
Joint Connector 8C- 2. . . . . . . . . . . . . . . . . . . . . .
Fuse Box and Relay 8C- 2. . . . . . . . . . . . . . . . . .
Power Supply Diagram 8C- 2. . . . . . . . . . . . . . . .
Combination Meter 8C- 2. . . . . . . . . . . . . . . . . . .
DIAGNOSIS8C- 4 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speedometer and VSS 8C- 4. . . . . . . . . . . . . . . .
Fuel Meter / Fuel Gauge Unit 8C- 4. . . . . . . . . . . .
Engine Coolant Temp. (ECT) Meter and
Sensor 8C- 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Light 8C- 4. . . . . . . . . . . . . . . . . . . .
Brake and Parking Brake Warning
Light 8C- 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Light Remainder Warning Buzzer 8C- 5. . . . . . . Seat Belt Warning Light (If Equipped) 8C- 5. . .
Ignition Key Remainder Warning
Buzzer (If Equipped) 8C- 5. . . . . . . . . . . . . . . . .
Cigarette Lighter and Accessory Socket 8C- 5.
ON-VEHICLE SERVICE8C- 6 . . . . . . . . . . . . . . . .
Ignition (Main) Switch 8C- 6. . . . . . . . . . . . . . . . .
Combination Meter 8C- 7. . . . . . . . . . . . . . . . . . .
Speedometer and VSS 8C- 8. . . . . . . . . . . . . . . .
Fuel Meter / Fuel Gauge Unit 8C- 9. . . . . . . . . . . .
Engine Coolant Temp. (ECT) Meter and
Sensor 8C-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Light 8C-11. . . . . . . . . . . . . . . . . . . .
Brake and Parking Brake Warning
Light 8C-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Key Remainder (If Equipped) /
Light Remainder Warning Buzzer 8C-12. . . . . .
Door Switch 8C-13. . . . . . . . . . . . . . . . . . . . . . . . .
Seat Belt Warning Light (If Equipped) 8C-13. . .
SECTION 8C
INSTRUMENTATION/DRIVER INFORMATION
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).
CONTENTS

YH4
GRAND
VITARA
WINDOWS, MIRRORS, SECURITY AND LOCKS 8D-7
POWER DOOR LOCK AND KEYLESS ENTRY SYSTEM (IF KEYLESS ENTRY IS
EQUIPPED)
TroublePossible causeCorrection

All power doors are not
locked / unlocked by
both driver side door key
switch and power door
lock switch. But all
power doors are locked /
unlocked by keyless
entry transmitter

All power doors are not
locked / unlocked by
driver side door key
switch, power door lock
switch and keyless entry
transmitter

When power doors are
locked / unlocked by
keyless entry
transmitter, hazard
warning lights do not
flash
ªDOOR LOCKº fuse blown

Power door lock and keyless entry system
faultyReplace fuse to check for short
Refer to SYSTEM INSPECTION
of POWER DOOR LOCK AND
KEYLESS ENTRY SYSTEM
(IF KEYLESS ENTRY IS
EQUIPPED) in this section
All power doors are not
locked / unlocked by only
power door lock switch
Power door lock switch faulty

Wiring or grounding faultyReplace switch
Repair
All power doors are not
locked / unlocked by only
driver side door key
switch
Driver side door key switch faulty

Wiring or grounding faultyReplace switch
Repair
All power doors are not
locked / unlocked by only
keyless entry transmitter
Code registration error

Transmitter battery dead

Transmitter faulty

Power door lock and keyless entry system
faultyRegister code
Replace battery
Replace transmitter
Refer to SYSTEM INSPECTION
of POWER DOOR LOCK AND
KEYLESS ENTRY SYSTEM
(IF KEYLESS ENTRY IS
EQUIPPED) in this section
Although any door is
opened within 30 seconds
after power door(s)
unlocked by keyless entry
transmitter, all power
doors are locked again
automatically
Door switch faulty

Wiring harness connected to door switch
brakesReplace switch
Repair
Only one power door is not
locked / unlocked
Wiring or coupler faulty

Actuator (door lock motor) faultyRepair
Replace actuator
Operation distance of
keyless entry is unstable
Transmitter battery dead

Transmitter faultyReplace battery
Replace transmitter

YH4
GRAND
VITARA
WINDOWS, MIRRORS, SECURITY AND LOCKS 8D-23
POWER DOOR LOCK AND KEYLESS ENTRY SYSTEM (IF KEYLESS ENTRY IS
EQUIPPED)
SYSTEM INSPECTION
STEPACTIONYESNO
1Check power door lock operation referring to its
INSPECTION in this section.
Is this operation OK?Go to Step 2.Go to Step 3.
2Check keyless entry operation referring to its
INSPECTION in this section.
Is this operation OK?Go to Step 4.Go to Step 6.
3Check keyless entry operation referring to its
INSPECTION in this section.
Is this operation OK?Go to Step 5.Go to Step 7.
4Check hazard warning lights operation referring to
its INSPECTION in this section.
Is this operation OK?This system is OK.Go to Step 10.
5Check door lock key and power door lock switch
circuit referring to its INSPECTION in this section.
Is this circuit OK?Replace controller and
recheck.
And go to Step 4.Repair circuit referring
to WIRING DIAGRAM
MANUAL and recheck.
And go to Step 4.
6Check ignition switch and door switch circuit
referring to its INSPECTION in this section.
Is this circuit OK?Replace controller and
recheck.
And go to Step 4.Repair circuit referring
to WIRING DIAGRAM
MANUAL and recheck.
And go to Step 4.
7Check power door lock actuator circuit referring to
its INSPECTION in this section.
Is this circuit OK?Go to Step 8.Repair circuit referring
to WIRING DIAGRAM
MANUAL and recheck.
If OK, go to Step 4.
If not OK, go to next
Step 8.
8Check power supply and grounding circuit
referring to its INSPECTION in this section.
Is this circuit OK?Go to Step 9.Repair circuit referring
to WIRING DIAGRAM
MANUAL and recheck.
If OK, go to Step 4.
If not OK, go to next
Step 9.
91) Check door lock key and power door lock
switch circuit referring to its INSPECTION in
this section.
2) Check ignition switch and door switch circuit
referring to its INSPECTION in this section.
Are these circuits OK?Replace controller and
recheck.
And go to Step 4.Repair circuit referring
to WIRING DIAGRAM
MANUAL and recheck.
And go to Step 4.

YH4
GRAND
VITARA
8G
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-1
GENERAL DESCRIPTION8G- 2 . . . . . . . . . . . . . .
Ignition Key 8G- 3. . . . . . . . . . . . . . . . . . . . . . . . . .
Coil Antenna 8G- 3. . . . . . . . . . . . . . . . . . . . . . . . .
Immobilizer Control Module 8G- 4. . . . . . . . . . . .
ECM/PCM 8G- 4. . . . . . . . . . . . . . . . . . . . . . . . . . .
On-Board Diagnostic System
(Self-Diagnosis Function) 8G- 4. . . . . . . . . . . . .
DIAGNOSIS8G- 6 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Precautions in Diagnosing Troubles 8G- 6. . . . .
Diagnostic Flow Table with monitor coupler> 8G- 9. . . . . . . . . . . . . . . .
Diagnostic Flow Table equipped with monitor coupler> 8G-10. . . . . . .
Diagnostic Trouble Code Check
(Immobilizer Control Module) 8G-11. . . . . . . .
Diagnostic Trouble Code Check
(ECM / PCM) 8G-11. . . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Code Table 8G-13. . . . . . . . .
TABLE A DTC is not Output
from Diagnostic Output Terminal 8G-14. . . . . . .
TABLE B Immobilizer Indicator Lamp
Check (Immobilizer Indicator Lamp
does not Light at Ignition Switch ON) 8G-15. . .
TABLE C Immobilizer Indicator Lamp
Check (Immobilizer Indicator Lamp
Remains on after Engine Starts) 8G-16. . . . . . .
DTC11 Transponder Code Not Matched8G-17 . .
DTC31 Transponder Code Not
Registered 8G-17. . . . . . . . . . . . . . . . . . . . . . . . .
DTC12 Fault in Immobilizer
Control Module 8G-17. . . . . . . . . . . . . . . . . . . . . .
DTC13 No Transponder Code Transmitted
or Coil Antenna Opened/Shorted 8G-18. . . . . . DTC21 ECM/Immobilizer Control Module
Code Not Matched (Immobilizer Control
Module Side) 8G-20. . . . . . . . . . . . . . . . . . . . . . .
DTC81 (P1623) ECM/Immobilizer
Control Module Code Not Matched
(ECM/PCM Side) 8G-20. . . . . . . . . . . . . . . . . . . .
DTC84 (P1620) ECM/Immobilizer Control
Module Code Not Registered 8G-20. . . . . . . . .
DTC22 Ignition Switch Circuit Open/Short8G-21 . .
DTC23 No ECM/Immobilizer Control
Module Code Transmitted from ECM/
PCM or DLC Circuit Opened/Shorted8G-22 . . . .
DTC83 (P1621) No ECM/Immobilizer
Control Module Code Transmitted from
Immobilizer Control Module or DLC
Circuit Opened/Shorted 8G-22. . . . . . . . . . . . . .
DTC82 (P1622) Fault in ECM/PCM 8G-23. . . . .
Inspection of ECM/PCM, Immobilizer
Control Module and Its Circuit 8G-24. . . . . . . . .
Voltage Check 8G-24. . . . . . . . . . . . . . . . . . . . .
Resistance Check 8G-25. . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE8G-26 . . . . . . . . . . . . . . . .
Precautions in Handling Immobilizer
Control System 8G-26. . . . . . . . . . . . . . . . . . . . .
Immobilizer Control Module 8G-27. . . . . . . . . . . .
Coil Antenna 8G-27. . . . . . . . . . . . . . . . . . . . . . . . .
HOW TO REGISTER IGNITION KEY8G-28 . . . . .
PROCEDURE AFTER IMMOBILIZER
CONTROL MODULE REPLACEMENT8G-29 . .
PROCEDURE AFTER ECM/PCM
REPLACEMENT8G-30 . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS8G-30 . . . . . . . . . . . . . . . . . . . . . .
SECTION 8G
IMMOBILIZER CONTROL SYSTEM
(IF EQUIPPED)
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).
CONTENTS

YH4
GRAND
VITARA
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-9
Fig. 1 for Step 1 Fig. 2 for Step 1 Fig. 3 for Step 2
1. Monitor coupler
2. Service wire
A: Diagnosis switch terminal
B: Ground terminal
Fig. 4 for Step 3
ªCHECK ENGINEº light
0.5
ON
OFF
TIME (sec.)
DIAGNOSTIC FLOW TABLE

STEPACTIONYESNO
11) Make sure that diagnosis switch
terminal in monitor coupler is not
grounded by service wire. See Fig. 1.
2) Check malfunction indicator lamp
while ignition switch is ON (but without
starting engine). See Fig. 2.
Dose malfunction indicator lamp flash?Go to Step 3.
If malfunction indicator lamp
remains ON, go to Step 2.

If malfunction indicator lamp
remains OFF, go to
ªMALFUNCTION INDICATOR
LAMP CHECKº in Section 6.
21) Using service wire, ground diagnosis
switch terminal in monitor coupler.
See Fig. 3.
Dose malfunction indicator lamp flash?Immobilizer control
system is in good
condition.Go to ªMALFUNCTION
INDICATOR LAMP CHECKº in
Section 6.
3Dose malfunction indicator lamp flash as
Fig. 4?Go to Step 4.Go to ªMALFUNCTION
INDICATOR LAMP CHECKº in
Section 6.
41) Check DTC stored in immobilizer
control module referring to
ªDIAGNOSTIC TROUBLE CODE
CHECK (IMMOBILIZER CONTROL
MODULE)º in this section.
Is there any DTC(s)?Go to flow table for
DTC No.Go to Step 5.
51) Check DTC stored in ECM/PCM
referring to ªDIAGNOSTIC TROUBLE
CODE CHECK (ECM / PCM)º in this
section.
Is there any DTC(s)?Go to flow table for
DTC No.Substitute a known-good ECM/
PCM and recheck.
NOTE:
After replacing with a known-
good ECM/PCM, register
ECM / Immobilizer Control
Module code in ECM/PCM by
performing procedure described
in ªProcedure after ECM/PCM
Replacementº section.

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-28 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
1
1. Ignition key with built-in transponder 1. Data link connector (DLC)
HOW TO REGISTER IGNITION KEY
Register the ignition key with a built-in transponder in Immobilizer
Control Module by using the following procedure.
1) Prepare Suzuki scan tool (TECH 1A kit and cartridge for immobi-
lizer control system).
2) With ignition switch OFF, connect Suzuki scan tool to data link
connector (DLC) located on underside of instrument panel at
driver's seat side.
Special Tool
(A): 09931-76011 (Tech 1A)
(B): Immobilizer cartridge
(C): 09931-76030 (16 / 14-pin DLC cable)
NOTE:
For operation procedure of Suzuki scan tool, refer to Suzuki
scan tool operator's manual.
3) Prepare ignition key with a built-in transponder. And then turn
ignition switch ON by using it.
4) Number of Transponder codes for ignition key with a built-in
transponder that can be registered in Immobilizer Control Mod-
ule is limited to 4. If needed, clear all Transponder codes for igni-
tion key with a built-in transponder that have been registered in
Immobilizer Control Module by executing the ªCLR. TRANS
COD (CLEAR TP CODE)º command in the SELECT MODE
menu by using Suzuki scan tool.
NOTE:
When ªCLR. TRANS COD (CLEAR TP CODE)º command is
executed with the malfunction indicator lamp (the lamp for
vehicles equipped with the monitor coupler) ON or the im-
mobilizer indicator lamp (the lamp for vehicle not equipped
with the monitor coupler) ON, it remains ON even after
execution of that command is over. It will start flashing
when the ignition switch is turned OFF once and then
turned ON after some seconds.
5) Using Suzuki scan tool, register Transponder code in Immobiliz-
er Control Module by executing ªENT. TRANS COD (ENT. TP
CODE)º command in SELECT MODE menu.
6) [Vehicle equipped with monitor coupler]
Make sure that malfunction indicator lamp lights when ignition
switch is turned OFF once and then ON.
[Vehicle not equipped with monitor coupler]
Make sure that immobilizer indicator lamp lights when ignition
switch is turned OFF once and then ON.