steering SUZUKI SX4 2006 1.G Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine 10C-12 Immobilizer Control System:
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.

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-17
Inspection of ICM and Its CircuitS6RW0DA304018
ICM and its circuit can be checked at ICM wiring connector by measuring voltage.
CAUTION!
ICM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to ICM with
connector disconnected from it.

Voltage Check
1) Remove ICM (1) from steering lock assembly or steering lock unit referring to “ICM Removal and Installation”.
2) Connect ICM connector (2) to ICM.
3) Check voltage at each terminal.
NOTE
As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when the
ignition switch is turned to ON position.

5DTC check of BCM
1) Check BCM for DTC referring to “DTC Check in Section
10B”.
Is DTC U0073, U0100, U0101, U0155 and/or U1144
detected?Go to applicable DTC
diag. flow.Go to Step 6.
6CAN communication circuit check
1) Disconnect connectors from ECM, BCM and ABS
control module.
2) Check CAN communication circuit for open, short and
high resistance.
• Between ECM and ABS control module
• Between BCM and ABS control module
Is each CAN communication circuit in good condition?Go to Step 7. Repair circuit.
7Replacement of BCM
1) Replace BCM with new one referring to “BCM (Included
in Junction Block) Removal and Installation in Section
10B”.
2) Check ECM for DTC referring to “DTC Check”.
Is DTC P1638 still detected?Substitute a known-
good ECM and recheck.BCM faulty. Step Action Yes No
1 2 3
4
1
25
6 [A]
I6RW0BA30003-01
[A]: ICM connector (harness side view)

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-19
Repair Instructions
ICM Removal and InstallationS6RW0DA306001
Removal
1) Disconnect negative (–) cable at battery.
2) Remove dash side trim (4) and steering column hole
cover (3).
3) Remove steering column covers (1).
Turn steering wheel to access steering column cover
screws (2).
4) Remove engine start knob (keyless start model).
5) Disconnect connector (1) from ICM (2).
6) Remove a screw (3) from ICM.
7) Remove ICM from steering lock assembly or
steering lock unit.
NOTE
The antenna part of ICM is fragile. Therefore,
do not add strong power to the part or twist
the part.

Installation
Reverse the removal procedure.
Registration of the Ignition KeyS6RW0DA306002
To finish the registration of the ignition key, the
transponder code memorized in the transponder built in
the ignition key has to be registered with ECM. To
register the transponder code with ECM, perform
“Immobilizer Key Registration” mode of SUZUKI scan
tool referring to “SUZUKI scan tool Operator’s Manual”.
NOTE
• A maximum of four transponder codes can
be registered with ECM.
• At an early part of the registration process,
all transponder codes of the ignition keys
in use already registered with ECM are
cleared. Therefore, before starting the
registration, prepare all ignition keys in
use in addition to the new ignition key(s) to
be registered with ECM.

Procedure after ECM ReplacementS6RW0DA306003
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. To register
transponder code in the ignition key with ECM, perform
“Immobilizer Key Registration” mode of SUZUKI scan
tool referring to “SUZUKI scan tool Operator’s Manual”.
NOTE
A maximum of four transponder codes can
be registered with ECM.

1
2
3
4I6RW0BA30004-01
2
3
1
I4RS0BA30007-03

Downloaded from www.Manualslib.com manuals search engine Keyless Start System: 10E-1
Control Systems
Keyless Start System
General Description
Keyless Start System DescriptionS6RW0DA501001
Keyless start system consisting of the parts shown below has three functions as described below.
• Keyless engine start function:
With the remote controller which has been registered in the keyless start control module carried with oneself, the
engine can be started without using the ignition key.
• Door lock function:
Pushing the request switch incorporated in the outside handle of the driver side door, passenger side door or rear
end door while carrying the remote controller which has been registered in the keyless start control module, doors
can be locked or unlocked.
• Keyless entry system function:
It is possible to lock or unlock doors by pushing the lock or unlock button of remote controller.
The keyless start control module can accept registration of up to four remote controllers.
3
2
11
104
8
5
3
6
7
1
14
13
9
12 [A]
12[B]
I6RW0DA50001-01
[A]: Junction block with BCM type 5. Luggage room antenna 11. Unlock button
[B]: Junction block without BCM type 6. Driver side door antenna 12. BCM
1. Keyless start control module 7. Passenger side door antenna 13. Key indicator light
2. Remote controller 8. Rear end door antenna 14. ECM
3. Request switch 9. Steering lock unit
4. Center antenna 10. Lock button

Downloaded from www.Manualslib.com manuals search engine 10E-2 Keyless Start System:
Parts and FunctionsS6RW0DA501002
Parts Function
Keyless start control module • Activates each antenna
• Verifies ID code of remote controller
• Requests steering lock unit to release steering lock
• Requests BCM to lock or unlock doors
• Controls key indicator light in combination meter
• Transmits its ID code to ECM
Remote controller • Receives request signal from each antenna
• Transmits ID code and request signal to keyless start control module
• Request keyless start control module to lock or unlock doors (keyless entry
system function)
Request switch • Requests keyless start control module to activate each antenna
Center antenna • Transmits request signal to remote controller
Luggage room antenna • Transmits request signal to remote controller
Driver side door antenna • Transmits request signal to remote controller
Passenger side door antenna • Transmits request signal to remote controller
Rear end door antenna • Transmits request signal to remote controller
Steering lock unit • Releases steering lock
Unlock button • Transmits door unlock request signal (keyless entry system function)
Lock button • Transmits door lock request signal (keyless entry system function)
BCM • Controls each door lock actuator
• Controls warning buzzer
• Lights hazard warning light and interior (DOME) light (answer back)
Key indicator light • Indicates operation state of keyless start system (indicates check result of
remote controller ID code)
ECM • Checks keyless start control module ID code
• Transmits its ID code to keyless start control module
• Starts engine

Downloaded from www.Manualslib.com manuals search engine Keyless Start System: 10E-3
Keyless Engine Start FunctionS6RW0DA501003
When the ignition knob switch (2) installed to the steering lock unit (1) is pushed, the keyless start control module (3)
activates the center antenna (4) to send out the request signal in the vehicle compartment. When the remote controller
(5) receives the request signal from the center antenna, it transmits the ID code to the keyless start control module.
The keyless start control module compares the ID code sent by the remote controller with the ID code registered in the
keyless start control module. When these ID codes match, the keyless start control module makes the key indicator
light (7) in the combination meter (6) light in blue and unlocks the steering lock unit to enable the ignition knob switch
to turn. When the ignition knob switch is turned to ON position in this state, ID codes of ECM and keyless start control
module are compared through CAN communication (immobilizer function). When they match, turning the ignition knob
switch to start position will start the engine.
NOTE
When ignition knob switch is at ACC or ON position (engine not running) and any door has been kept
open for a certain time, it may happen that engine fails to start. In such a case, turn ignition knob
switch to OFF position once and then try to start engine again.

When the ID code from the remote controller and the ID code registered in the keyless start control module do not
match or when the remote controller is outside the operation area of the remote controller and the ignition knob switch
is pushed, the steering lock unit cannot be unlocked and so the ignition knob switch cannot be turned. Then, the
keyless start control module makes the key indicator light in the combination meter light in red to warn the driver that it
is not possible to turn the ignition knob switch.
In case of vehicle equipped with immobilizer control system, when the ID code of ECM and that of the keyless start
control module do not match, the engine cannot be started even if the ignition knob switch is turned to the start
position. Then ECM makes the immobilizer indicator light in the combination meter flash to warn the driver that it is not
possible to start the engine.
[A]: i) ~ vii)
83
1
6ii)
iii) iii)
iii) iii) iv) i)
v) vi)
vii)
76
2
4
5
I5RW0AA50002-03
[A]: Signal flow 8. ECM

Downloaded from www.Manualslib.com manuals search engine Keyless Start System: 10E-7
Keyless Start Control Module Reception Data
Schematic and Routing Diagram
Keyless Start System Electric Wiring Circuit DiagramS6RW0DA502001
Vehicle speed signal
ECM-keyless start control module code
Door switch status
Door lock status
Charging system signal
Engine oil pressure switch signalECM BCM
DATA
ReceiveKeyless Start
Control Module
I5RW0CA50001-02
BLK/ORNG16-9
G16-15
G16-14
G16-37G16-33
G16-16
G16-20G16-29G16-30
G16-36
G16-32
G16-10
G16-34
G16-11BLU/WHT
WHT/RED
WHT/RED
PNK/BLKGRY/BLU
BLU/RED
YEL
PPL
RED/BLK
5V5V 5V5V
5V5V
5V12V 12V
G16-2G16-1BLU
ORNWHTREDWHTREDG16-18G16-19
BLU/YEL
ORN
G16-24G16-23
BLK/YEL WHT/BLU
G16-7
GRN/WHTLT GRNG16-8
G16-5G16-6
GRN WHT/BLK
G16-4G16-3 WHT/GRN
RED/BLU
BLK/YELBRN/YELBRNG146-3
G146-1
G146-2G146-5
G146-4
G146-6
G146-7G146-8
WHT/RED
WHT/RED
G16[A]
1 2 3 4 5 6 7 8 9 10 11 14 15 16
36 34 33 32 30 29 24 23 37 18 19 20
WHTRED
WHT
WHT
RED
RED
WHTRED
6
7
8
9
10
11
12
13
14
15118
21
21
2
3
5
419
20
16
17
22
WHTRED
WHTREDWHTRED
18 1920WHTRED
WHTRED
21
[B][C]
I6RW0DA50002-01
[A]: Keyless start control module connector (viewed
from harness side)7. Passenger side door antenna 16. Combination meter
[B]: Junction block with BCM type 8. Rear end door antenna 17. Key indicator light
[C]: Junction block without BCM type 9. Center antenna 18. BCM
1. Keyless start control module 10. Luggage room antenna 19. ECM
2. Steering Lock unit 11. Driver side door request switch 20. ABS control module
3. Steering lock solenoid 12. Passenger side door request switch 21. CAN junction connector

Downloaded from www.Manualslib.com manuals search engine 10E-8 Keyless Start System:
Diagnostic Information and Procedures
Precautions in Diagnosing TroublesS6RW0DA504001
• The keyless start system executes data transmission/
reception by means of the radio wave. Therefore,
proper operation may not be obtained if use of the
door lock function and engine start function of the
keyless start system is attempted near the place
where strong radio wave is emitted (TV and radio
broadcasting stations, etc.).
• Diagnostic information stored in keyless start control
module memory can be checked only by key indicator
light.
• Be sure to use the trouble diagnosis procedure as
described in “Keyless Start System Check”. Failure to
follow it may result in incorrect diagnosis. (Some other
DTC may be stored by mistake in the memory of
keyless start control module during inspection.)
• Be sure to read“Precautions for Electrical Circuit
Service in Section 00” before inspection and observe
what is written there.
• Communication of ECM, TCM (A/T model), BCM,
ABS control module, 4WD control module (if
equipped), keyless start control module and
combination meter is established by CAN (Controller
Area Network). (For detail of CAN communication for
keyless start control module, refer to “CAN
Communication System Description”). Therefore,
handle CAN communication line with care referring to
“Precaution for CAN Communication System in
Section 00”.
• Replacement of the keyless start control module
When keyless start control module is replaced with
new one, make sure that register remote controller ID
code to keyless start control module correctly
according to “Registration Procedure for Remote
Controller ID Code”.• Keyless start control module substitution
When the keyless start control module used in
another vehicle was installed in the vehicle being
serviced, register the ID code of the remote controller
to the keyless start control module first and then the
following code.
– With immobilizer control system, register the
ignition key transponder code for the immobilizer
control system in ECM. For registration procedure
of that, refer to “Registration of the Ignition Key in
Section 10C”.
– Without immobilizer control system, register the
steering lock unit ID code in keyless start control
module. For registration procedure of that, refer to
“Keyless Start Registration”.
Self-Diagnosis FunctionS6RW0DA504002
The keyless start control module has self-diagnosis
function to monitor the system components and circuits
while the keyless start system is at work. When the
keyless start control module detects an abnormality in
the system, it saves the area where such abnormality
has occurred as a DTC in its memory. The DTC stored in
memory of the keyless start control module is indicated
by the key indicator light in the combination meter
flashing in a specific pattern. For DTC indication, refer to
“DTC Check” and for the clearing procedure, to “DTC
Clearance”.
Keyless Start System Diagnosis IntroductionS6RW0DA504003
To ensure that the trouble diagnosis is done accurately
and smoothly, observe “Precautions in Diagnosing
Troubles” and follow “Keyless Start System Check”.
4. Ignition knob switch 13. Rear end door request switch 22. Ignition Switch
5. Key reminder switch 14. Driver side door lock switch
6. Driver side door antenna 15. Passenger side door lock switch

Downloaded from www.Manualslib.com manuals search engine 10E-10 Keyless Start System:
Customer Questionnaire (Example)S6RW0DA504005
Key Indicator Light CheckS6RW0DA504006
Push the ignition knob switch (2) of the steering lock unit
(1) and check that the key indicator light (3) in the
combination meter lights up in red or blue. If it does not
light, go to “Key Indicator Light Circuit Check (Key
Indicator Light Doesn’t Light when Ignition Knob Switch
is Pushed)”.
Customers name:
Model:
VIN:

Date of issue:
Date Reg:
Date of problem:
Mileage:

Problem Symptoms
Engine can not be started by turning Ignition knob
switch
All doors can not be locked / unlocked by all of
request switches
Other
Frequency of Occurrence Continuous / Intermittent ( times a day, a month)
/ Other

Environmental Condition
Weather:
Fine / Cloudy / Rain / Snow / Other

Temperature: (F )
Stopping near area where intense radio waves are
emitted such as TV station, radio station, etc.
Yes / No
Diagnostic Trouble Code
First check:
Normal code / malfunction code ( )
Second check:
Normal code / malfunction code ( )
I4RS0BA50007-03
3
1
2
I4RS0BA50008-01

Downloaded from www.Manualslib.com manuals search engine 10E-12 Keyless Start System:
DTC TableS6RW0DA504008
DTC ClearanceS6RW0DA504009
1) Perform Steps 1) through 5) of DTC check procedure
and have DTC indicated.
2) Open driver side door.
3) Close driver side door and within 10 seconds after
that, perform Steps a) to c) described below.
a) Push unlock side (3) of driver side manual door
lock switch (1).
b) Push lock side (2) of driver side manual door
lock switch.
c) Repeat Steps a) and b) 3 times.
At the end of Step c), DTCs are cleared and key
indicator light indicates DTC No. 12 (Normal).
4) After completing DTC clearance, remove ignition key
from ignition key cylinder. DTC (Flashing pattern
of key indicator light)Detected parts item Detecting condition
) 11Communication Error with Steering
Lock UnitNo communication is available between keyless
start control module and steering lock unit
12 — Normal (No malfunction DTC is detected)
) 13Release Signal Error from Steering
Lock UnitAlthough lock release signal is output to steering
lock unit, it is not inputted from steering lock unit
) 14Steering Lock Unit Malfunction Steering lock unit cannot be unlocked due to its
temperature rise
) 21Internal Error in Keyless Start Control
Module (EEPROM Reading Error)Data cannot be read from memory in keyless start
control module
) 22Internal Error in Keyless Start Control
Module (EEPROM Writing Error)Data cannot be written into memory in keyless start
control module
) 31Lost Communication with BCM Keyless start control module cannot receive data
sent by CAN from BCM
) 33Control Module Communication Bus
OffNo communication is available with all control
modules connected by CAN
) 51Driver Side Door Request Switch
MalfunctionInput signal from driver side door request switch
remains ON, unchanged
) 52Passenger Side Door Request Switch
MalfunctionInput signal from passenger side door request
switch remains ON, unchanged
) 53Rear End Door Request Switch
MalfunctionInput signal from rear end door request switch
remains ON, unchanged
1
32
I4RS0BA50011-02