2003 SUZUKI GRAND VITARA engine control

YH4
GRAND
VITARA
8G-8 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
[NOTES ON SYSTEM CIRCUIT INSPECTION]
Refer to ªPrecautions for Electrical Circuit Serviceº and ªIntermit-
tents and Poor Connectionº in Section 0A.
[Precaution after replacing ECM / PCM or Immobilizer Control Mod-
ule]

When ECM / PCM was replaced, including when replaced be-
cause rechecking by using a known-good ECM / PCM was neces-
sary during trouble diagnosis, the ECM/Immobilizer Control Mod-
ule code must be registered in ECM / PCM and Immobilizer
Control Module by performing procedure described in ªProce-
dure after ECM / PCM Replacementº on p. 8G-27. If it is not regis-
tered, the engine would not start and accurate trouble diagnosis
would not be assured.

When Immobilizer Control Module was replaced, including when
replaced because rechecking by using a known-good Immobiliz-
er Control Module was necessary during trouble diagnosis, the
Transponder code and ECM/Immobilizer Control Module code
must be registered in Immobilizer Control Module and ECM/Im-
mobilizer Control Module code in ECM / PCM by performing pro-
cedure described in ªProcedure after Immobilizer Control Module
Replacementº on p. 8G-26. If they are not registered, the engine
would not start and accurate trouble diagnosis would not be as-
sured.

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
8G-10 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
DIAGNOSTIC FLOW TABLE

STEPACTIONYESNO
11) Check immobilizer indicator lamp
while ignition switch is ON (but without
starting engine). See Fig. 1.
Dose immobilizer indicator lamp flash?Go to Step 3.
If immobilizer indicator lamp
remains ON, go to Step 2.

If immobilizer indicator lamp
remains OFF, go to
ªIMMOBILIZER INDICATOR
LAMP CHECKº in this section.
21) 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 ªIMMOBILIZER
INDICATOR LAMP
CHECKº in this section.Immobilizer control system is in
good condition.
31) 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 4.
41) Check DTC stored in ECM / PCM
referring to ªDIAGNOSTIC TROUBLE
CODE CHECK (ECM / PCM)º in this
section.
Is there any DTC(s) for immobilizer
control system?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.
FIg. 1 for Step 1

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-26 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
ON-VEHICLE SERVICE
PRECAUTIONS IN HANDLING IMMOBILIZER
CONTROL SYSTEM

Do not turn ON ignition switch with ignition key for immobilizer
control system put together with another one or placed quite close
to another one. Or the system may detect abnormal condition and
prevent engine from starting.

Do not turn ON ignition switch by using ignition key with any type
of metal wound around its grip or in contact with it. Or the system
may detect abnormal condition and prevent engine from starting.

Do not leave ignition key where high temperature is anticipated.
High temperature will cause transponder in ignition key to be ab-
normal or damaged.

Do not turn ON ignition switch with a radio antenna placed near
coil antenna or its harness to Immobilizer Control Module. Or the
system may detect abnormal condition and prevent engine from
starting.

YH4
GRAND
VITARA
1. (a)
1. (a)
1
11
Tightening Torque
(a): 23 N.m (2.3 kg-m, 17.0 lb-ft)
1. Bolt
BODY SERVICE 9-33
INSTRUMENTATION AND DRIVER INFORMATION
INSTRUMENT PANEL
WARNING:
See WARNING at the beginning of this section.
REMOVAL
1) Disconnect negative cable at battery.
2) Disable air bag system. Refer to ªDisabling Air Bag Systemº in
Section 10B.
3) Remove console box.
4) Remove glove box and column hole cover.
5) Disconnect wires and cables from heater unit and blower motor
assembly.
6) Remove steering column assembly. Refer to Section 3C1.
7) Disconnect speedometer connector and remove speedometer
assembly. If equipped with air bag, disconnect wire coupler at
SDM and air bag ground terminal for air bag.
8) Remove engine hood opener.
9) Disconnect couplers which need to be disconnected for removal
for instrument panel.
10) Remove instrument panel mounting screws.
11) Remove instrument panel mounting bolt.
12) Remove instrument panel.
CAUTION:
For vehicle with Air Bag, instrument panel could not be re-
moved with SDM coupler connected and ground terminal
installed.
Use care not to damage Air Bag harness.
INSTALLATION
1) Install instrument panel by reversing removal procedure, noting
the following items.

When installing each part, be careful not to catch any cable or
wiring harness.

When installing steering column assembly, refer to ªAIR BAG
STEERING COLUMN INSTALLATIONº in Section 3C1.
2) Adjust control cables. (Refer to Section 1A ªHEATER CON-
TROL CABLESº.)
3) Enable air bag system. Refer to ªEnabling Air Bag Systemº in
Section 10B.