2008 SUZUKI SWIFT module can

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Reference waveform No. 3
Driver side seat belt switch signal (1)
Reference waveform No. 4
BCM – ABS/ESP® control module CAN communication
signal Reference waveform No. 5
Oil pressure switch signal (1)
Reference waveform No. 6
BCM – DLC CAN communication signal
Measurement terminal CH2: “L01-14” to “G33-3”
Oscilloscope setting
CH2: 5 V/DIV
TIME: 4 ms/DIV
Measurement
condition Ignition switch is at ON position
and driver side seat belt is
fastened
Measurement terminal CH2: “E46-1” to “G33-3”
CH3: “E46-2” to “G33-3”
Oscilloscope setting CH2: 1 V/DIV
CH3: 1 V/DIV
TIME: 40
µs/ DIV
Measurement
condition Ignition switch is at ON position
1. CAN communication line signal (High)
2. CAN communication line signal (Low)
I4RS0AA20016-02
I4RS0AA20017-02
Measurement terminal CH2: “E46-11” to “G33-3”
Oscilloscope settingCH2: 5 V / DIV
TIME: 10 ms / DIV
Measurement
condition Engine is running and oil
pressure is in normal condition
Measurement terminal CH2: “G37-1” to “G33-3”
CH3: “G37-3” to “G33-3”
Oscilloscope setting CH2: 1 V / DIV
CH3: 1 V / DIV
TIME: 40
µs / DIV
Measurement
condition Ignition switch is at ON position
1. CAN communication line signal (High)
2. CAN communication line signal (Low)
I4RS0AA20018-02
I4RS0AA20019-02

Downloaded from www.Manualslib.com manuals search engine 10C-1 Immobilizer Control System:
Control Systems
Immobilizer Control System
Precautions
Precautions in Diagnosing TroublesS7RS0BA300001
• 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, keyless start control module (if equipped), ABS / ESP ® control module,
steering angle sensor (ESP ® model), combination
meter and TCM (A/T model) 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 ECMS7RS0BA300002
• 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”.
Precautions in Handling Immobilizer Control
System
S7RS0BA300003
• Do not turn ON ignition sw itch with ignition key in
contact with another one or quite close to another
one. Or, the immobilizer co ntrol 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 i mmobilizer control system may
detect some abnormal condition and prevent the
engine from starting.
I3RH0AA30001-01
1
I3RH0AA30002-01

Downloaded from www.Manualslib.com manuals search engine 10C-3 Immobilizer Control System:
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 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

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-8
Immobilizer Indicator Lamp Remains ON after Engine StartsS7RS0BA304007
Wiring Diagram
Refer to “Immobilizer Control S ystem Wiring Circuit Diagram”.
Circuit Description
When the ignition switch is turned ON, ECM read the code by the coil antenna from ignition key. Then if the code in
transponder in the key match with the one registered with ECM, transmits indication ON signal of immobilizer indicator
lamp to combination meter in order to turn immobilizer indicator lamp on. And then, combination meter turns
immobilizer indicator lamp on. When th e engine starts to run and no malfunction is detected in the system, ECM
transmits immobilizer indicator lamp indication O FF signal to combination meter in order to turn immobilizer indicator
lamp off. And then, comb ination meter turns immobilizer indicator lamp off, but if a malfunction was or is detected,
immobilizer indicator lamp is flashes ON and OF F, when ignition switch turn to ON position.
Troubleshooting 4
Fuse check
1) Turn ignition switch to OFF position.
2) Check for fuse blown at combination meter circuit fuse in
junction block assembly.
Is fuse in good condition? Go to Step 5. Replace fuse and check
for short to power or
ground circuit.
5 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) 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 Combination meter power and ground circuit check
1) Remove combination meter referring to “Combination
Meter Removal and Installation in Section 9C”.
2) Check for proper connection to combination meter connector terminals.
3) If OK, then turn ignition switch to ON position, Check terminal voltage of combination meter between power
supply and ground terminal. Refer to “Combination
Meter Circuit Diagram in Section 9C”.
Is it 10 – 14 V? Substitute a known-
good combination meter
and recheck. If
immobilizer indicator
lamp still remains OFF,
substitute a known good
ECM and recheck.
Repair power supply
and/or ground circuit.
Step Action Yes No
Step
Action YesNo
1 DTC check of ECM
1) Start engine and recheck DTC of ECM while engine
running.
Is DTC P1674, P1675, P1678 and/or P1685 detected? Go to applicable DTC
diag. flow.
Go to Step 2.
2 CAN communication circuit check
1) Disconnect connectors from ECM, BCM, ABS control
module and combination meter.
2) Check CAN communication circuit for open, short and high resistance.
• Between ECM and ABS control module
• Between BCM and ABS control module
• Between BCM and combination meter
Is each CAN communication circuit in good condition? Substitute a known-
good combination meter
and recheck. If
immobilizer indicator
lamp still remains ON,
substitute a known-
good ECM and recheck.
Repair circuit.

Downloaded from www.Manualslib.com manuals search engine 10C-9 Immobilizer Control System:
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

Downloaded from www.Manualslib.com manuals search engine 10C-11 Immobilizer Control System:
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.