2008 SUZUKI SWIFT Combination

Downloaded from www.Manualslib.com manuals search engine 10B-33 Body Electrical Control System:
BCM connector “G37”E46-11 Oil pressure switch
*3 – 14 V Refer to “Reference waveform No. 5: ”
0 V Ignition switch is at ON position and engine is at stop
E46-12 — — —
E46-13 — — —
E46-14 — — —
Terminal Circuit Normal voltage Condition
Terminal
CircuitNormal voltage Condition
G37-1 CAN communication line (low)
for DLC *1.6 – 2.5 V Refer to “Reference waveform No. 6: ”
G37-2 CAN communication line (low)
for combination meter *1.6 – 2.5 V Refer to “Reference waveform No. 7: ”
G37-3 CAN communication line
(high) for DLC *2.5 – 3.6 V Refer to “Reference waveform No. 6: ”
G37-4 CAN communication line
(high) for combination meter *2.5 – 3.6 V Refer to “Reference waveform No. 7: ”
G37-5 Serial communication line of
data link connector 8 – 12 V Ignition switch is at ON position
G37-6 — — —
G37-7 — — —
G37-8 Theft deterrent light 10 – 14 V Theft deterrent light is not lit up
0 V Theft deterrent light is lit up
G37-9 — — —
G37-10 — — —
G37-11 Serial communication line for
information display
(if equipped) *0 – 1 V
↑↓
10 – 14 V Refer to “Reference
waveform No. 8: ”
G37-12 Ground for keyless entry
receiver (if equipped) 0 V
—
G37-13 Power supply for keyless entry
receiver (if equipped) 4 – 6 V Ignition switch is at all positions
G37-14 Signal for keyless entry
receiver (if equipped) *0 – 1 V
↑↓
4 – 6 V Refer to “Reference
waveform No. 9: ”
G37-15 — — —
G37-16 Key reminder switch 10 – 14 V Ignition key is inserted to ignition key cylinder
0 V Ignition key is pulled out from ignition key cylinder
G37-17 Rear end door window
defogger switch 0 V
Ignition switch is at ON
position and rear end door
window defogger switch is pushed
10 – 14 V Ignition switch is at ON
position and rear end door
window defogger switch is not pushed
G37-18 A/C switch *3 – 14 V Refer to “Reference waveform No. 10: ”
0 V Ignition switch is at ON pos
ition, blower speed selector
is at any position other than OFF position and A/C
switch is at ON position
G37-19 — — —
G37-20 — — —
G37-21 Rear wiper INT switch *0 – 1 V
↑↓
10 – 14 V Refer to “Reference
waveform No. 11: ”
0 V Ignition switch is at ON pos
ition and rear wiper switch
is at INT position
G37-22 Rear wiper low switch *0 – 1 V
↑↓
10 – 14 V Refer to “Reference
waveform No. 12: ”
0 V Ignition switch is at ON pos
ition and rear wiper switch
is at LOW position

Downloaded from www.Manualslib.com manuals search engine 10B-37 Body Electrical Control System:
Reference waveform No. 7
BCM – combination meter CAN communication signal
Reference waveform No. 8
Information display serial communication signal (1)Reference waveform No. 9
Keyless entry receiver signal (1)
Reference waveform No. 10
A/C switch signal (1)
Measurement terminal
CH2: “G37-2” to “G33-3”
CH3: “G37-4” 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)
Measurement terminal CH2: “G37-11” to “G33-3”
Oscilloscope setting
CH2: 5 V / DIV
TIME: 2 ms / DIV
Measurement
condition Ignition switch is at ON position
I4RS0AA20020-02
I4RS0AA20021-02
Measurement terminal CH2: “G37-14” to “G33-3”
Oscilloscope settingCH2: 2 V / DIV
TIME: 200 ms / DIV
Measurement
condition Lock or unlock button of
keyless entry transmitter is
pushed
Measurement terminal CH2: “G37-18” to “G33-3”
Oscilloscope setting CH2: 5 V / DIV
TIME: 10 ms / DIV
Measurement
condition Ignition switch is at ON position,
A/C switch or blower speed
selector is at OFF position
I4RS0AA20022-02
I4RS0AA20023-02

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 Immobilizer Control System: 10C-4
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

Downloaded from www.Manualslib.com manuals search engine 10C-7 Immobilizer Control System:
Scan Tool DataS7RS0BA304005
Scan Tool Data Definitions
NUMBER OF LEARNT KEY
0 – 4 PCS: 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.

INPUT YEAR
20**: The year in which the transponder code in the transpon der built in the ignition key is registered with ECM
INPUT MONTH
1 – 12: The month in which the transponder code in the transpond er built in the ignition key is registered with ECM
Immobilizer Indicator Lamp Does Not Come ON with Ignition Switch ON and Engine StopS7RS0BA304006
Wiring Diagram
Refer to “Immobilizer Control System 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 indi cator lamp indication OFF 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 Scan Tool Data Vehicl
e Condition Normal Data
NUMBER OF LEARNT KEY Ignition switch at ON position 0 – 4 INPUT YEAR Ignition switch at ON position 2005 or later
INPUT MONTH Ignition switch at ON position 1 – 12
Step Action YesNo
1 Immobilizer indicator lamp power supply check
1) Turn ignition switch to ON position.
Do other warning lights come ON? Go to Step 2.
Go to Step 4.
2 DTC check of ECM
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is DTC P1674, P1675, P1678 and/or P1685 detected? Go to applicable DTC
diag. flow.
Go to Step 3.
3 DTC check of BCM
1) 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.
Substitute a known-
good combination meter
and recheck. If
immobilizer indicator
lamp still remains OFF,
substitute a known good
ECM and recheck.

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-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.

Downloaded from www.Manualslib.com manuals search engine 10E-2 Keyless Start System:
Parts and FunctionsS7RS0BA501002
PartsFunction
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 la
mp 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 lamp and interior (DOME) light (answer back)
Key indicator lamp • 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