Keyless SUZUKI SX4 2006 1.G Service Repair Manual

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5) Disconnect connectors from BCM and junction
block.
6) Detach wiring harness clamp from junction block.
Installation
Reverse removal procedure for installation, noting
following points.
• Connect connectors securely.
• Enable air bag system referring to “Enabling Air Bag
System in Section 8B”.
• With keyless entry system (other than keyless start
model), if BCM is replaced, register transmitter code
into BCM, referring to “Programming Transmitter
Code for Keyless Entry System (Other than Keyless
Start Model) in Section 9F”.
Security Alarm Mode Selection Procedure (If
Equipped)
S6RW0DA206005
Security alarm mode can be selected by performing the
following procedure.
1) Confirm that all doors are closed, all doors are
unlocked and ignition key is inserted in ignition key
cylinder.
2) Remove ignition key from ignition key cylinder.
3) Perform Step a) through e) described below within
15 seconds.
a) Insert ignition key (1) in ignition key cylinder (2).
b) Remove ignition key from ignition key cylinder.
c) Repeat Step a) and b) twice.
d) Insert ignition key in ignition key cylinder.
e) Push lock side (3) of driver side manual lock
switch (4) 3 times.4) When Step 3) is completed, the mode changes to
the next one automatically. The warning buzzer
(located in BCM) sounds by the number of specified
for each mode as follows.
• Changed from A mode to B mode: Buzzer sounds
4 times
• Changed from B mode to A mode: Buzzer sounds
once
Outside Air Temperature Sensor Removal and
Installation
S6RW0DA206002
For removal and installation, refer to “Outside Air
Temperature Sensor Removal and Installation (If
Equipped) in Section 9C”.
Outside Air Temperature Sensor InspectionS6RW0DA206003
For inspection, refer to “Outside Air Temperature Sensor
Inspection (If Equipped) in Section 9C”.
Special Tools and Equipment
Special ToolS6RW0DA208001
1 2
4
3
I7JB01A20007-01
SUZUKI scan tool
—
This kit includes following
items. 1. Tech 2, 2. PCMCIA
card, 3. DLC cable, 4. SAE
16/19 adapter, 5. Cigarette
cable, 6. DLC loop back
adapter, 7. Battery power
cable, 8. RS232 cable, 9.
RS232 adapter, 10. RS232
loop back connector, 11.
Storage case, 12. )

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Control Systems
Immobilizer Control System
Precautions
Precautions in Diagnosing TroublesS6RW0DA300001
• Before confirming the diagnostic trouble code (DTC),
do not disconnect connector from ECM, battery cable
from battery, ground wire harness, or main fuse. Such
disconnection will erase DTC stored in ECM.
• DTC stored in ECM memory can be checked as well
as cleared by using SUZUKI scan tool. Before using
SUZUKI scan tool, read its operator’s manual
carefully to know how to use it and what functions are
available.
• Be sure to read “Precautions for Electrical Circuit
Service in Section 00” before inspection.
• Communication of ECM, BCM, ABS control module,
TCM (if equipped), 4WD control module (if equipped),
keyless start control module (if equipped),
combination meter and DLC is established by CAN
(Controller Area Network). Therefore, handle CAN
communication lines with care referring to “Precaution
for CAN Communication System in Section 00”.
For CAN communication system, refer to description
on “CAN Communication System Description in
Section 1A”.
Precaution in Replacing ECMS6RW0DA300002
• If ECM is replaced with new or used one without
Immobilizer control function, the engine will not be
started. In case of the above, check if the newly
installed ECM has Immobilizer control function.
• After ECM is replaced with new one or used one, the
transponder code in the transponder built in the
ignition key has to be registered with ECM. Or, the
engine cannot be started up. For the registration
procedure, refer to “Procedure after ECM
Replacement”.
Precaution in Replacing Ignition KeyS6RW0DA300003
To register ignition key in case of replacing key(s) and/or
making spare key(s), the transponder code in the ignition
key is registered with ECM. Or the engine can not be
started up. For the registration procedure, refer to
“Registration of the Ignition Key”.
Precautions in Handling Immobilizer Control
System
S6RW0DA300004
• Do not turn ON ignition switch with ignition key in
contact with another one or quite close to another
one. Or, the immobilizer control system may detect
some abnormal condition and prevent the engine from
starting.
• Do not turn ON ignition switch by using ignition key
with any type of metal (1) wrapped its grip or in
contact with it. Or, the immobilizer control system may
detect some abnormal condition and prevent the
engine from starting.
I3RH0AA30001-01
1
I3RH0AA30002-01

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• Do not leave ignition key in a place where
temperature is high. High temperature may cause
damage to the transponder built in the ignition key.• Do not turn ignition switch to ON position by bringing
radio antenna close to coil antenna. Or, the
immobilizer control system may detect some
abnormal condition and prevent the engine from
starting.
General Description
Immobilizer Control System IntroductionS6RW0DA301001
The immobilizer control system is an anti-theft device that immobilizes the vehicle. It stops the engine from working
and prevents the vehicle from being stolen. It mainly consists of the following components. For immobilizer control
system components location, refer to “Immobilizer Control System Components Location”.
•ECM
• ICM with the built-in coil antenna
• Ignition key with the built-in transponder
A code called the transponder code is memorized in the transponder. And, the code is registered with ECM. Basically,
when the ignition switch is turned ON, ECM reads the code by the coil antenna. Then, if the code in transponder in the
ignition key does not match with the one registered with ECM, ECM stops the operation of the fuel injection so as not
to start up the engine and turns the immobilizer indicator light ON and OFF using CAN communication lines. (In
addition to the above operation, ECM also turns the immobilizer indicator light ON and OFF when some trouble is
detected in the keyless start system.)
On-Board Diagnostic System Description (Self-diagnosis Function)S6RW0DA301002
ECM diagnoses if there is any trouble with the immobilizer control system. The diagnostic information is stored as the
diagnostic trouble code (DTC) in ECM. To read the diagnostic information, use SUZUKI scan tool referring to “DTC
Check”.
With the ignition switch turned ON (but the engine at stop) regardless of the condition of the engine and emission
control system, ECM indicates whether there is any trouble with the immobilizer control system or not by either lighting
ON or flashing ON and OFF the immobilizer indicator light.
Immobilizer indicator light lights ON:
No trouble exists in the immobilizer control system. (After starting up the engine, the light turns OFF.)
Immobilizer indicator light flashes ON and OFF:
There is some trouble in the immobilizer control system or in the keyless start system. Its diagnostic information is
stored in ECM.
I3RH0AA30003-01
I3RH0AA30004-01

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Schematic and Routing Diagram
Immobilizer Control System Wiring Circuit DiagramS6RW0DA302001
NOTE
For more details about power supply circuit, ground wire circuit, and each circuit for ECM, BCM, ABS
control module, keyless start control module and combination meter, refer to “System Circuit Diagram
in Section 9A”.

BLK/WHT
BLK/ORN12V
G17-1
G17-2
12V
5V
12V
12VYEL/RED
YEL/BLK
G17-4
G17-3
5V
BRN
BRN/YEL
BLK/YEL
1 2
22
2 34
251014
15
1 2 3
4 G17
[A]
5
6
G16-20 G16-29 G16-30 G146-3 G146-7 G146-8
WHT/RED
5V
5V
9
G16-18G16-19 E01-13
E01-28
BLU
BLU
RED
WHTE08-12
E08-1E01-18
E01-3
RED
WHTE08-13
E08-2E04-1
E04-2
WHT
RED
G04-1
G04-3
12V
E04-9
G04-5
PPL/WHTL313-3 8
11
12
13
G17-5WHT 76
G17-6WHT/RED
17
REDWHT
REDWHT
G241-10 G241-7
IG1
18
WHT
REDG04-4
G04-2
16 [B]
I6RW0DA30001-02

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BLK/WHT
BLK/ORN12V
G17-1
G17-2
12V
5V
12V
12VYEL/RED
YEL/BLK
G17-4
G17-3
5V
BRNBRN/YELBLK/YEL
1 2
22
2 34
251014
15
1 2 3
4 G17
[A]
5
6
G16-20 G16-29 G16-30 G146-3 G146-7 G146-8
WHT/RED
5V
5V
9
G16-18G16-19 E01-13
E01-28
BLU
RED
WHTE08-12
E08-1E01-18
E01-3
RED
WHTE08-13
E08-2
WHT
RED
G05-4
G05-2
12V
G05-35 8
11
G17-5WHT 76
G17-6WHT/RED
17
REDWHT
REDWHT
G241-10 G241-7
IG1
18
WHT
REDG05-1
G05-3
16 [C]
I6RW0DA30002-01
[A]: ICM connector (harness side view) 5. ICM 12. To SDM
[B]: Junction block with BCM type 6. Illumination ring (if equipped) 13. To ABS control module
[C]: Junction block without BCM type 7. To BCM 14. Steering lock unit (keyless start model)
1. Battery 8. ABS control module 15. Keyless start control module (if equipped)
2. Fuse 9. DLC 16. CAN junction connector
3. Ignition switch 10. ECM 17. Combination meter
4. Junction block 11. BCM 18. Immobilizer indicator light

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Component Location
Immobilizer Control System Components LocationS6RW0DA303001
Diagnostic Information and Procedures
Immobilizer Control System CheckS6RW0DA304001
3
4567
1
2
2
13
I6RW0BA30001-01
1. ECM 5. Ignition key (non keyless entry model)
2. Immobilizer indicator light 6. Ignition key (keyless start model)
3. ICM 7. Transponder
4. Ignition key (keyless entry model)
Step Action Yes No
1Immobilizer indicator light check
1) Turn ignition switch to ON position using ignition key.
Does immobilizer indicator light come on?Go to Step 2. Check if DTC P1636
and/or P1638 are
detected by ECM
referring to “DTC
Check”. If detected, go
to applicable DTC diag.
flow. If not detected, go
to “Immobilizer Indicator
Light Does Not Come
ON with Ignition Switch
ON and Engine Stop”.
2Immobilizer indicator light check
Does immobilizer indicator light flash on and off continuously
in Step 1?Check ECM for DTC
referring to “DTC
Check”. Then, go to
applicable DTC diag.
flow.Go to Step 3.
3Engine start check
1) Start engine using ignition key.
Does engine start?Go to Step 4. Go to “Engine and
Emission Control
System Check in
Section 1A”.
4Immobilizer indicator light check
1) Check if immobilizer indicator light remains ON after
engine start.
Does immobilizer indicator light remains ON after engine
start?Go to “Immobilizer
Indicator Light Remains
ON after Engine Start”.Immobilizer control
system is in good
condition. Then, go to
“Keyless Start System
Check in Section 10E”
for keyless start model.

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DTC TableS6RW0DA304004
ECM
NOTE
ECM detects DTC. ICM does not.

NOTE
If any DTC other than the above DTCs is detected, refer to “DTC Table in Section 1A”.

DTC No. Detecting Item Detecting ConditionImmobilizer
Indicator
Light
) P1614 Transponder response errorTransponder code in transponder built in
ignition key cannot be read through ICM.Flash
) P1615 Steering lock unit communication error• While registering the transponder code in
the transponder built in the ignition key in
ECM, the keyless start control module sent
a signal to ECM indicating that the ID code
could not be registered.
• The ID code could not be registered in the
keyless start control module or ECM.Flash
) P1616 Unregistered keyless start control moduleECM detects different ID codes registered in
ECM and keyless start control module.Flash
) P1618Keyless start control module CAN
communication errorReception error of communication data for
keyless start control module is detected for
longer than specified time continuously.Flash
) P1621 Immobilizer communication line error Communication error between ICM and ECM. Flash
) P1622 EEPROM reading / writing error EEPROM in ECM is corrupted. Flash
) P1623 Unregistered transponderTransponder code in the transponder built in
the ignition key is invalid.Flash
) P1625 Immobilizer antenna error ICM is faulty. Flash
) P1636Immobilizer information registration
failureCommunication error between ECM and BCM. No operation
) P1638 Immobilizer information mismatched• Communication error between ECM and
BCM.
• Wrong ECM or BCM is used.No operation

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Scan Tool DataS6RW0DA304005
Suzuki scan tool displays the following data using “Registration Information” mode.
Scan Tool Data Definitions
Component ID (****)
This parameter indicates the vehicle ID number of four digits used for the Suzuki scan tool.
Keyfree System Code (Keyless start control system ID code, Registered, Unregistered)
Registered: ID code of the keyless start system is registered in the ECM.
Unregistered: ID code of the keyless start system is unregistered in the ECM.
Remote Starter Code (Remote starter control system code, Registered, Unregistered)
Registered: Remote starter system is registered in the ECM.
Unregistered: Remote starter system is unregistered in the ECM.
Number of the Registered Immobilizer Key (0 – 4 keys)
The number of the transponder code in the transponder built in the ignition key that is registered with ECM.
NOTE
A maximum of four transponder codes can be registered with ECM. Therefore, the maximal value
should be 4.

Latest Year for the Key Registration (2006 or Later)
The year in which the transponder code in the transponder built in the ignition key is registered with ECM.
Latest Month for the Key Registration (January-December)
The month in which the transponder code in the transponder built in the ignition key is registered with ECM. Scan Tool Data
(Registration Information Data)Vehicle Condition Normal Data
) Component ID
Ignition switch at ON position****
) Keyfree System Code Registered
) Remote Starter Code Unregistered
) Number of the Registered Immobilizer Key 2 Keys
) Latest Year for the Key Registration 2006
) Latest Month for the Key Registration June

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DTC P1615: Steering Lock Unit Communication ErrorS6RW0DA304009
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Circuit Description
When the transponder code in the ignition key is registered in ECM, the ID code is registered in both ECM and keyless
start control module at the same time. This DTC is detected only in case that the ID code cannot be registered in both
ECM and keyless start control module when the transponder code in the ignition key is registered in ECM.
NOTE
• Troubleshoot DTC P1618 first if both DTC P1615 and P1618 are detected at the same time.
• After replacing ECM, be sure to register the transponder code in the ignition key with ECM referring
to “Registration of the Ignition Key”. After replacing the keyless start control module of the vehicle
equipped with the keyless start system, be sure to perform “Registration of the Ignition Key”.

Detecting Condition and Trouble Area
TroubleshootingDetecting Condition Trouble Area
• While registering the transponder code in ECM, the
keyless start control module sent a signal to ECM
indicating that the ID code could not be registered.
• The ID code could not be registered in the keyless start
control module or ECM.• Wire circuits between steering lock unit and keyless
start control module
• CAN communication circuit
• Steering lock unit
• Keyless start control module
• Combination meter
• TCM (if equipped)
• 4WD control module (if equipped)
• ABS control module
•BCM
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2Registration of ignition key
1) Register ignition key in use with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed?Recheck ECM for DTC.
If DTC P1615 is still
detected, go to Step 3.Go to Step 3.
3DTC check of ECM
1) Check ECM for DTC referring to “DTC Check in Section
1A”.
Is DTC U0073, U0101, U0121 and/or U0140 detected?Go to applicable DTC
diag. flow.Go to Step 4.
4DTC check of keyless start control module
1) Check keyless start control module for DTC referring to
“DTC Check in Section 10E”.
Is DTC detected?Go to applicable DTC
diag. flow.Go to Step 5.
5Check for communication circuit between steering lock
unit and keyless start control module
1) Check for open, short, and high resistance in steering
lock unit circuit. Refer to Step 2 in “DTC No. 11:
Communication Error with Steering Lock Unit in Section
10E”.
Is each circuit in good condition?Go to Step 6. Repair malfunction part
and recheck.

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DTC P1616: Unregistered Keyless Start Control ModuleS6RW0DA304010
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Circuit Description
P1616 is detected when ECM detects different ID codes registered in ECM and keyless start control module after
turning engine start knob to ON position. Normally, when keyless start control module is replaced with new one, ECM
automatically registers the applicable code in keyless start control module after turning ignition switch to ON position.
However, when keyless start control module is replaced with used one, ECM does not automatically register the
applicable code in keyless start control module even if ignition switch is turned to ON position.
Detecting Condition and Trouble Area
Troubleshooting6Steering lock unit power supply check
1) Connect keyless start control module connector.
2) With ignition switch at ON position, check power supply
terminal voltage of steering lock unit connector. Refer to
“Keyless Start Control Module Power and Ground Circuit
Check in Section 10E”.
Is voltage 4 – 6 V?Replace steering lock
unit and recheck.Substitute a known-
good keyless start
control module and
recheck. If DTC P1615
is still detected,
substitute a known-
good ECM and recheck. Step Action Yes No
Detecting Condition Trouble Area
ECM detects different ID codes registered in ECM and
keyless start control module.• Keyless start system wire circuit
• Keyless start control module
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2Registration of the ignition key
1) Register the ignition key with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed?Recheck ECM for DTC. Go to Step 3.
3DTC check of ECM
1) Check DTC referring to “DTC Check”.
Is DTC P1618 and/or P1615 detected other than P1616?Go to DTC P1618
troubleshooting.Go to DTC P1615
troubleshooting.