keyless and start system SUZUKI SWIFT 2008 2.G Service Service Manual

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Immobilizer Control System Components LocationS7RS0BA301002
On-Board Diagnostic System Description (Self-diagnosis Function)S7RS0BA301003
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 di agnostic information, use SUZUKI scan tool referring to
“Diagnostic Trouble Code (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 ther e is any trouble with the immobilizer control system or not by either lighting
ON or flashing ON and OFF t he immobilizer indicator lamp.
Immobilizer indicator lamp lights ON:
No trouble exists in the immobilizer control system. (After starting up the engine, the light turns OFF.)
Immobilizer indicator lamp flashes ON and OFF:
There is some trouble in the immo bilizer control system. Its diagnostic information is stored in ECM.
13
4
56
7
2
I6RS0CA30001-01
1. ECM 4. Ignition key with keyless entry system 7. Transponder
2. Immobilizer indicator lamp 5. Ignition key without keyless entry system
3. Immobilizer control module (ICM) 6. Ignition key with keyless start system

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Schematic and Routing Diagram
Immobilizer Control System Wiring Circuit DiagramS7RS0BA302001
NOTE
For more details about power supply and ground circuits for ECM, BCM, keyless start control module,
ABS control module and combination meter, refer to “System Ci rcuit Diagram in Section 9A”.

BLK/WHT
BLK/ORN12V
G24-1
G24-2
12V
5V
12V
12VYEL/RED
YEL/BLK
G24-4
G24-3
12V
5V
BRN
BRN/YEL
BLK/YEL
1
2
2 2
2
34
2 6712
11
9
14
12
3
4
G24
[A]
5
6
REDWHT
G42-20 G42-29 G42-30
G04-3 G04-7 G04-8
WHT/RED
5V
5V
5
G28-9 G28-7
G42-18G42-19
E23-13
E23-28
IG1
PPL/WHT 10
PPL/WHT
PPL/WHT
E23-5
RED
WHT**E85-46E23-18
E23-3
RED
WHT
E46-1
E46-2
WHT
RED
G37-2
G37-4
WHT/BLK
RED/BLK
G37-1
G37-3
12V
E46-9
G37-5
13
8
**E85-42
**E85-13
**E85-44
G28-10
G28-8
*E03-8 *E03-10
*E03-12
*E03-6
I7RS0BA30001-01
[A]: Immobilizer control module connector (harness side vi ew) 6. Immobilizer control module (ICM) 12. Steering lock unit
1. Battery 7. ECM 13. ABS/ESP ® control module
2. Fuse 8. BCM 14. CAN junction connector (ESP ® model)
3. Ignition switch 9. Combination meter *: ABS model
4. Junction block assembly 10. Immobilizer indicator lamp **: ESP ® model
5. Data link connector (DLC) 11. Keyless start control module

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Diagnostic Information and Procedures
Immobilizer Control System CheckS7RS0BA304001
Diagnostic Trouble Code (DTC) CheckS7RS0BA304002
NOTE
To know how to use SUZUKI scan tool in
detail, refer to its operator’s manual.

Using Scan Tool
1) Turn the ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector (DLC) (1) located under instrument panel at driver’s
seat side.
Special tool
(A): SUZUKI scan tool 3) Turn the ignition switch to ON position.
4) Check if any DTC is stored
in ECM according to the
instructions displayed on SUZUKI scan tool.
5) After completing the check, turn ignition switch to
OFF position, and then di sconnect SUZUKI scan
tool from DLC.
Using Diagnosis Connector (If equipped)
Refer to “Without Using Scan Tool (Vehicle Equipped
with Diagnosis Connector)” under “DTC Check in
Section 1A”.
Step Action Yes No
1 Immobilizer indicator lamp check
Turn ignition switch to ON position using ignition key.
Does it immobilizer in dicator lamp come on? Go to Step 2.
Check if DTC P1636
and/or P1638 are
detected by ECM
referring to “Diagnostic
Trouble Code (DTC)
Check”. If detected, go
to applicable DTC diag.
flow. If not detected, go
to “Immobilizer Indicator
Lamp Does Not Come
ON with Ignition Switch
ON and Engine Stop”.
2 Immobilizer indicator lamp check
Does it immobilizer indicato r lamp flashes on and off
continuously in Step 1? Check ECM for DTC
referring to “Diagnostic
Trouble Code (DTC)
Check”. Then, Go to
applicable DTC diag.
flow.Go to Step 3.
3 Engine start check
Start engine using ignition key.
Does engine start? Go to Step 4.
Perform “Engine and
Emission Control
System Check in
Section 1A”.
4 Immobilizer indicator lamp check
Check Immobilizer indicator la mp remains ON after engine
start.
Does immobilizer indicator la mp remains ON after engine
start? Go to “Immobilizer
Indicator Lamp
Remains ON after
Engine Starts”.
Immobilizer system is
good condition. Then go
to “Keyless Start
System Check in
Section 10E”. (Vehicle
equipped with keyless
start system only)
(A)1
I4RS0BA30003-03

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Diagnostic Trouble Code (DTC) ClearanceS7RS0BA304003
NOTE
To know how to use SUZUKI scan tool in
detail, refer to its operator’s manual.

Using Scan Tool
1) Turn the ignition switch to OFF position,
2) Connect SUZUKI scan tool to data link connector (DLC) (1) located under instrument panel at driver’s
seat side.
Special tool
(A): SUZUKI scan tool 3) Turn the ignition switch to ON position.
4) Clear DTC(s) according to the instructions displayed
on SUZUKI scan tool.
5) After completing the clearance, turn the ignition switch to OFF position, and then disconnect SUZUKI
scan tool from DLC.
Using Diagnosis Connector (If Equipped)
Refer to “Without Using Scan Tool” under “DTC
Clearance in Section 1A”.
Diagnostic Trouble Code (DTC) TableS7RS0BA304004
ECM
NOTE
If any DTC other than the above DTCs is detected, refer to “DTC Table in Section 1A”.

(A)1
I4RS0BA30003-03
DTC No. Detecting Item Detecting ConditionImmobilizer
Indicator Lamp
P1614 Transponder Response Error Transponder code in the transponder built in
the ignition key cannot be read through ICM.Flash
P1615 ID Code Does Not Re
gistered (Vehicle
equipped with Keyless Start System only) • 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 Different Registration ID Codes (Vehicle
equipped with Keyless Start System only) ECM detects different ID codes registered in
ECM and keyless start system.
Flash
P1618 CAN Communication Error (Reception Error
for Keyless Start Control Module) (Vehicle
equipped with Keyless Start System only) Reception error communication data for
keyless start control module is detected for
longer than specified time continuously.
Flash
P1621 Immobilizer Commu nication Line ErrorCommunication error between ICM and
ECM is detected by ECM. Flash
P1622 EEPROM Reading / Writing Error EEPROM in ECM is corrupted.Flash
P1623 Unregistered Transponder Transponder code in the transponder built in
the ignition key is invalid.Flash
P1625 Immobilizer Antenna Error ICM is faulty.Flash
P1636 Immobilizer Information Registration Failure Communication error between ECM and
BCM is detected by ECM.No operation
P1638 Immobilizer Info rmation Mismatched • Communication error between ECM and
BCM is detected by ECM
• Wrong ECM or BCM is used. No operation

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DTC P1614: Transponder Response ErrorS7RS0BA304008
Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Turn ignition switch to ON position.
2) Check DTC in ECM.
Troubleshooting
DTC P1615: ID Code Does Not Registered (Vehicle equipped with keyless start system only)S7RS0BA304009
Circuit Description
When the transponder code of the ignition key is registered in ECM, the remote controller ID code is also registered in
ECM and keyless start contro l module at the same time.
DTC P1615 is detected only when the remote controller ID code cannot be registered in ECM and keyless start control
module when the ignition key is registered.
NOTE
• Perform troubleshooting of DTC P1618 if both DTC P1615 and P1618 have been detected.
• After replacing ECM, be sure to register the tran sponder code in the ignition key with ECM referring
to “Registration of the Ignition Key”. After replac ing the keyless start control module of the vehicle
equipped with the keyless start system, be sure to register referring to “Registration of the Ignition
Key”.

Detecting Condition and Trouble Area Detecting Condition Trouble Area
Transponder code in the transponder built in the ignition
key cannot be read through ICM. • Ignition key
•ICM
•ECM
Step
Action YesNo
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2.Go to “Immobilizer
Control System Check”.
2 DTC check of ECM
1) Check if DTC other than P1614 is detected referring to
“Diagnostic Trouble Code (DTC) Check”.
Is DTC other than P1614 detected? Go to applicable DTC
diag. flow.
Go to Step 3.
3 Registration of ignition key in use with ECM
1) Register ignition key in use with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed? Unregistered ignition
key.
Go to step 4.
4 Registration of spare ignition key with ECM
1) Register spare ignition key with ECM referring to
“Registration of the Ignition Key”.
Was registration of spare ignition key completed? Replace ignition key
which can not be
registered.
Substitute a known-
good ECM and recheck.
Detecting Condition
Trouble Area
• 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. • Circuit between steering lo
ck unit and keyless start
control module
• CAN communication circuit
• Steering lock unit
• Keyless start control module
•ECM

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DTC Confirmation Procedure1) Register the transponder code in the transponder in the ignition key with ECM referring to “Registration of the
Ignition Key”.
2) Check DTC in ECM.
Troubleshooting
DTC P1616: Different Registration ID Codes (Vehicle equipped with keyless start system only)S7RS0BA304010
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 blank ID code of
keyless start control module to applicable one after turning ignition switch to ON position.
However, when keyless start control module is replaced wit h used one, ECM does not automatically register old ID
code of keyless start control module to applicable one ev en if ignition switch is turned to ON position.
Step Action Yes No
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 Registration of Ignition Key
1) Register ignition key in use with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed? Unregistration of remote
controller ID code.
Go to Step 3.
3 DTC check of ECM
Is DTC detected other than P1615? Go to applicable DTC
diag. flow.
Go to Step 4.
4 DTC 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.
5 Check for communication circuit between steering lock
unit and keyless start control module
1) With the ignition switch at OFF position, disconnect
steering lock unit connector and keyless start control
module connector.
2) Check for proper connection at terminals and wires of
each connector referring to “Intermittent and Poor
Connection Inspection in Section 00”.
3) If OK, check for open, short, and high resistance in each circuit between steering lock unit and keyless start
control module. Refer to step 2 in “DTC No. 11:
Communication Error with Steeri ng Lock Unit in Section
10E”.
Is each circuit in good condition? Go to Step 6. Repair malfunction part.
6 Steering lock unit power supply check
1) Connect keyless start control module connector.
2) With ignition switch at ON position, check voltage
between power supply terminal and ground terminal of
steering lock unit connector.
Is voltage 4 – 6 V? Replace steering lock
unit.
Substitute a known-
good keyless start
control module and
recheck. If DTC P1615
is still detected,
substitute a known good
ECM and recheck.

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Detecting Condition and Trouble Area
DTC Confirmation Procedure1) Engine start knob turn to ON position.
2) Check DTC for ECM.
Troubleshooting
DTC P1618: CAN Communication Error (Reception Error for Keyless Start Control Module) (Vehicle
equipped with keyless start system only)
S7RS0BA304011
Detecting Condition and Trouble Area
DTC Confirmation Procedure 1) Turn Ignition switch to ON position.
2) Check DTC for ECM.
Troubleshooting Detecting Condition Trouble Area
ECM detects different ID codes registered in ECM and
keyless start control module. • Keyless start control module
•ECM
Step
Action YesNo
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2.Go to “Immobilizer
Control System Check”.
2 Registration of the Ignition Key
1) Clear DTC referring to “Diagnostic Trouble Code (DTC)
Clearance”.
2) Register ignition key with ECM referring to “Registration of the Ignition Key”.
Is ignition key able to be registered? Go to Step 3.
Go to Step 4.
3 Keyless start system operation check
Engine start using keyless start system.
Does engine start? Unregistration of remote
controller ID code.
Check DTC for ECM.
When DTC is detected,
go to applicable DTC.
4 DTC check of ECM
Check DTC for ECM.
Is DTC P1618 and/or P1615 detected other than P1616? Go to DTC P1618
troubleshooting.
Go to DTC P1615
troubleshooting.
Detecting Condition
Trouble Area
Reception error of communication data for keyless start
control module is detected for longer than specified time
continuously. • CAN communication circuit
• Combination meter
• Keyless start control module
•BCM
•ECM
• ABS/ESP®
control module
Step Action YesNo
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2.Go to “Immobilizer
Control System Check”.
2 DTC check of ECM
Is DTC P1674, P1675, P1678 and/or P1685 detected
together? Go to applicable DTC
diag. flow.
Go to Step 3.

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DTC P1621: Immobilizer Communication Line ErrorS7RS0BA304012
Detecting Condition and Trouble Area
DTC Confirmation Procedure1) Ignition switch turn to ON position.
2) Check DTC for ECM.
Troubleshooting 3
DTC check of BCM
Check BCM for DTC referring to “DTC Check in Section
10B”.
Is DTC U1073, U1100 and/or U1144 detected? Go to applicable DTC
diag. flow.
Go to Step 4.
4 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC.
Is DTC P1618 detected? Go to Step 5. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
5 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control modules for open, short and high resistance.
Is each CAN communication circuit in good condition? Go to Step 6. Repair circuit.
6 Keyless start control module power and ground circuit
check
Check for keyless start control module power and ground
circuit referring to “Keyless St art Control Module Power and
Ground Circuit Check in Section 10E”.
Are they in good condition? Substitute a known-
good keyless start
control module and
recheck.
Repair keyless start
control module power
and/or ground circuits.
Step Action Yes No
Detecting Condition
Trouble Area
Communication error between ICM and ECM is detected
by ECM. • Related fuse(s)
• Circuit between ICM and ECM
•ICM
•ECM
Step
Action YesNo
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2.Go to “Immobilizer
Control System Check”.
2 Fuse check
1) Check fuse for ICM circuit.
Is fuse in good condition? Go to Step 3.
Replace fuse and check
for short to power and
ground circuit.
3 Voltage check at ICM power and ground terminal
1) Check power and ground terminal voltage of ICM
connector referring to “Inspe ction of Immobilizer Control
Module (ICM) and Its Circuit”.
Is each terminal voltage in good condition? Go to Step 4.
Repair circuit.

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Repair Instructions
Immobilizer Control Module (ICM) Removal and
Installation
S7RS0BA306001
Removal1) Disconnect negative (–) cable at battery.
2) Remove steering wheel referring to “Steering Wheel Removal and Installa tion in Section 6B”.
3) Remove steering column lower and upper covers.
4) Remove knee protector plate (1). (if equipped)
5) Remove engine start knob (2). (if equipped with keyless start system)
6) Disconnect connector (1) from ICM (2).
7) Remove a screw (3) from ICM.
8) 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 KeyS7RS0BA306002
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
“Register Ig Key” mode of SU ZUKI scan tool referring to
“SUZUKI Tech 2 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 ReplacementS7RS0BA306003
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
“Replace New ECM” mode of SUZUKI scan tool
referring to “SUZUKI Tech 2 Operator’s Manual”.
NOTE
A maximum of four transponder codes can
be registered with ECM.

2
1
I4RS0BA30006-03
2
3
1
I4RS0BA30007-03

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Control Systems
Keyless Start System
General Description
Keyless Start System DescriptionS7RS0BA501001
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 handl e 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 push ing the lock or unlock button of remote controller.
The keyless start control module can accept regi stration of up to four remote controllers.
5
12
13
9
14
1
2
6
3
748
3
11
10
I4RS0BA50001-02
1. Keyless start control module 5. Luggage room antenna 9. Steering lock unit13. Key indicator lamp
2. Remote controller 6. Driver side door antenna10. Lock button14. ECM
3. Request switch 7. Passenger side door antenna11. Unlock button
4. Center antenna 8. Rear end door antenna12. BCM