Key bcm SUZUKI SWIFT 2007 2.G Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-24
DTC U1073 (No. 1073): Control Module Communication Bus OffS7RS0BA204014
Wiring Diagram
Refer to “DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control Module”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure 1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
DTC Troubleshooting DTC detecting condition Trouble area
Transmission error that is inconsistent between transmission data and
transmission monitor (CAN bus monitor) data is detected more than 7
times continuously.
(1 driving detection logic) • CAN communication circuit
• Combination meter
• BCM (included in junction block
assembly)
• TCM (A/T model)
• ABS/ESP ® control module
• Keyless start control module (if equipped)
•ECM
• Steering angle sensor (if equipped)
Step Action YesNo
1 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC.
Is DTC U1073 detected? Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
2 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 3.
Repair circuit.

Downloaded from www.Manualslib.com manuals search engine 10B-29 Body Electrical Control System:
DTC U1144 (No. 1144): Lost Communication with Keyless Start Control ModuleS7RS0BA204017
Wiring Diagram
Refer to “DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control Module”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure 1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
DTC Troubleshooting DTC detecting condition Trouble area
BCM can not receive data sent by CAN from keyless start control module for
longer than specified time continuously. • CAN communication circuit
• Combination meter
• Keyless start control module
• BCM (included in junction block
assembly)
Step Action YesNo
1 DTC check of BCM
Is DTC U1144 (No. 1144) and DTC U1073 (No. 1073)
detected together? Go to “DTC U1073 (No.
1073): Control Module
Communication Bus
Off”.Go to Step 2.
2 DTC check of keyless start control module
1) Check keyless start co ntrol module for DTC.
Is DTC No. 33 detected? Go to “DTC No. 33:
Control Module
Communication Bus Off
in Section 10E”.Go to Step 3.
3 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck BCM for DTC.
Is DTC U1144 (No. 1144) detected? Go to Step 4.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
4 CAN communication circuit check
1) Disconnect connectors from BCM, combination meter
and keyless start control module.
2) Check CAN communication circuit for open, short and high resistance.
• Between BCM and combination meter
• Between combination meter and keyless start control module
Is each CAN communication circuit in good condition? Go to Step 5.
Repair 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 other than Step 4 for open, short and high
resistance.
Is each CAN communication circuit in good condition? Go to Step 6.
Repair circuit.

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-30
6Combination meter operation check
1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Turn ignition switch to ON position.
3) Check combination meter operation for seat belt reminder light (fastening and unfastening driver side
seat belt).
Are they OK? Go to Step 7.
Check combination
meter power and
ground circuit. If circuit
is OK, substitute a
known-good
combination meter and
recheck.
7 Key indicator light operation check
1) Turn ignition switch to OFF position.
2) Push ignition knob switch of steering lock unit.
Does key indicator light turn ON? Go to Step 8.
Check keyless start
control module power
and ground circuit. If
circuit is OK, substitute
a known-good keyless
start control module and
recheck.
8 DTC check of BCM
1) Disconnect connector of any one of control module other
than BCM.
2) Recheck BCM for DTC.
Is DTC U1144 (No.1144) detected? Disconnect connectors
of control modules other
than the one whose
connector is
disconnected in Step 1)
one by one and check
that DTC U1144 is
detected by BCM each
time connector is
disconnected. When
DTC U1144 is not
detected by BCM while
checking in this way, go
to description under
“NO” below. If DTC
U1144 is detected by
BCM even when
connectors of all control
modules that use CAN
communication with
BCM are disconnected,
substitute a known-
good BCM and recheck.Check power and
ground circuit of control
module disconnected in
Step 1). If circuit is OK,
substitute a known-
good control module
disconnected in Step 1)
and recheck.
Step
Action YesNo

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-32
BCM connector “E46”L01-8
“3” position switch
(A/T model) *0 – 1 V
↑↓
10 – 14 V Refer to “Reference waveform No. 2: ”
0 V Ignition switch is at ON positi
on and A/T select lever is at
“2” or “3” position
L01-9 — — —
L01-10 Driver side door lock actuator
control (Unlock) (if equipped) 10 – 14 V Unlock signal is output for driver side door lock actuator.
0 V Unlock signal is not output for driver side door lock
actuator.
L01-11 Rear end door opener
actuator control 0 V Rear end door opener actuator is not in operation
10 – 14 V Rear end door opener actuator is in operation
L01-12 Manual door lock switch
(Lock) 10 – 14 V
Manual door lock switch is at any position other than lock
position
0 V Manual door lock swit ch is at lock position
L01-13 — — —
L01-14 Driver side seat belt switch *0 – 3 V
↑↓
10 – 14 V Refer to “Reference waveform No. 3: ”
0 V Ignition switch is at ON position and driver side seat belt
is unfastened
L01-15 Door switch (other than driver
side door and rear end door) 10 – 14 V
Rear right and left side door and passenger side door are
closed
0 V Any one of the door is opened (except driver side door
and rear end door)
L01-16 Driver side door key cylinder switch (Lock) 10 – 14 V
Driver side door key cylinder switch is at any position
other than lock position
0 V Driver side door key cylinder switch is at lock position
L01-17 Driver side door key cylinder
switch (Unlock) 10 – 14 V
Driver side door key cylinder switch is at any position
other than unlock position
0 V Driver side door key cylinder switch is at unlock position
L01-18 — — —
Terminal Circuit Normal voltage Condition
Terminal
CircuitNormal voltage Condition
E46-1 CAN communication line
(high) for ABS/ESP
® control
module *2.5 – 3.6 V
Refer to “Reference waveform No. 4: ”
E46-2 CAN communication line
(low) for ABS/ESP
® control
module *1.6 – 2.5 V
E46-3 — — —
E46-4 Generator “L” terminal 10 – 14 V Engine is running
0 V Ignition switch is at ON position
E46-5 Brake fluid level switch *0 – 3 V
↑↓
10 – 14 V Refer to “Reference waveform No. 1: ”
0 V Ignition switch is at ON position, parking brake lever is
released and brake fluid level is lower than MIN level
E46-6 — — —
E46-7 — — —
E46-8 Sensor ground for outside air
temperature sensor
(if equipped) 0 V
—
E46-9 Serial communication line of
data link connector for ECM,
TCM, ABS and
P/S control
module 8 – 12 V Ignition switch is at ON position
E46-10 Outside air temperature
sensor (if equipped) About 1.5 VIgnition switch is at ON position and outside air
temperature approx. 20
°C (68 °F)

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 Body Electrical Control System: 10B-34
Junction block connector “E40”
Junction block connector “E41”
Junction block connector “G32”
Junction block connector “G33”
Junction block connector “G34”
Junction block connector “K01”
Junction block connector “L04”
Junction block connector “L05”Terminal Circuit Normal voltage Condition
E40-2 Backup power source 10 – 14 V Igni tion switch is at all positions
TerminalCircuitNormal voltage Condition
E41-3 Horn 10 – 14 V Horn switch is at ON position
0 V Horn switch is at OFF position
Terminal CircuitNormal voltage Condition
G32-2 Power source (IG) 10 – 14 V Ignition switch is at ON position
0 V Ignition switch is at any position other than ON position
G32-5 Power source (ACC) 10 – 14 V Ignition switch is at ACC or ON position
0 V Ignition switch is at any position other than ACC or ON
position
Terminal
CircuitNormal voltage Condition
G33-3 Ground for BCM 0 V Ignition switch is at all positions
G33-7 Rear end door window
defogger indicator light 10 – 14 V
Engine is running and rear end door window defogger
indicator light is lit up
0 V Engine is running and rear end door window defogger
indicator light is not lit up
Terminal
CircuitNormal voltage Condition
G34-3 Horn switch 10 – 14 V Horn switch is not pushed
0 V Horn switch is pushed
G34-7 Lighting switch 10 – 14 VEngine is running (equipped with DRL) or lighting
switch is at any position other than OFF position
0 V Lighting switch is at OFF position
G34-9 Ground for BCM 0 V Ignition switch is at all positions
G34-11 Hazard warning switch 0 VHazard warning switch is at
ON position or lock or
unlock button of key less entry transmitter (answer
back control) is pushed
10 – 14 V Hazard warning switch is at OFF position
Terminal CircuitNormal voltage Condition
K01-5 Interior light 10 – 14 V
Interior light switch is at
DOOR position and interior
light is not lit up
0 V Interior light switch is at
DOOR position and interior
light is lit up
Terminal CircuitNormal voltage Condition
L04-2 Air bag communication line *0 – 1 V
↑↓
4 – 6 V Refer to “Reference
waveform No. 13: ”
L04-3 Serial communication line of
data link connector for SDM 8 – 12 V Ignition switch is at ON position
Terminal
CircuitNormal voltage Condition
L05-4 Ground for BCM 0 V Ignition switch is at all positions
L05-5 Power supply for rear wiper
motor 10 – 14 V Ignition switch is at ON 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 10B-39 Body Electrical Control System:
Repair Instructions
BCM (Included in Junction Block Assembly)
Removal and Installation
S7RS0BA206001
CAUTION!
Do not attempt removal of BCM from junction
block assembly as it may cause contact
failure.
If there is faulty condition in BCM, replace
junction block assembly.

Removal
1) Disconnect negative (–) cable from battery.
2) Disable air bag system referring to “Disabling Air Bag System in Section 8B”.
3) Remove dash side trim (1) and steering column hole cover (2).
4) Remove junction block assembly mounting nuts (3).
5) Disconnect connectors from BCM and junction block assembly.
6) Detach wiring harness clamp from junction block assembly.
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”.
Outside Air Temperature Sensor Removal and
Installation
S7RS0BA206002
For removal and installation, refer to “Outside Air
Temperature Sensor Removal and Installation (If
Equipped) in Section 9C”.
Outside Air Temperature Sensor InspectionS7RS0BA206003
For inspection, refer to “Outside Air Temperature Sensor
Inspection (If Equipped) in Section 9C”.
Security Alarm Mode Selection Procedure (If
Equipped)
S7RS0BA206004
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
4. BCM 5. Junction block assembly
I4RS0BA20010-01
4
3
1
2
I5RS0DA20007-01

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