ect sensor SUZUKI SWIFT 2008 2.G Service Workshop Manual

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Restraint
Air Bag System
Precautions
Precautions on Service and Diagnosis of Air
Bag System
S7RS0B8200001
WARNING!
• If the air bag system and another vehicle system both need repair, SUZUKI
recommends that the air bag system be
repaired first, to help avoid unintended air
bag system activation.
• Do not modify the steering wheel, dashboard, both front seat or any other on
or around air bag system components.
Modifications can adversely affect air bag
system performance and lead to injury.
• Be sure to follow the procedures described in this section. Failure to follow
procedures could result in possible air bag
system activation, personal injury or
unneeded air bag system repairs.

• WARNING / CAUTION labels are attached on each
part of air bag system components (SDM, air bag
(inflator) modules and seat belt pretensioners). Be
sure to follow the instructions.
• Many of service procedures require disconnection of
“A/BAG” fuse and air bag (inflator) module(s) (driver,
passenger, side of both si des and curtain of both
sides) from initiator circuit to avoid an accidental
deployment.
• Do not apply power to the air bag system unless all components are connected or a diagnostic flow
requests it, as this will set a DTC.
• The “Air Bag Diagnostic S ystem Check” must be the
starting point of any air bag diagnostics. The “Air Bag
Diagnostic System Check” will verify proper “AIR
BAG” warning right operatio n and will lead you to the
correct flow to diagnose any air bag malfunctions.
Bypassing these procedures may result in extended
diagnostic time, incorrect diagnosis, and incorrect
parts replacements. • Never use air bag component parts from another
vehicle.
• If the vehicle will be exposed to temperatures over 93
° C (200 °F) (for example, during a paint baking
process), remove the air bag system components
beforehand to avoid component damage or
unintended system activation.
• When handling the air bag (inflator) modules (driver, passenger, side of both si des and curtain of both
sides), seat belt pretensio ners (driver and passenger),
SDM, forward-sensor or side-sensor, be careful not to
drop it or apply an impact to it. If an excessive impact
was applied (e.g., SDM, forward-sensor and side-
sensor are dropped, air bag (inflator) module is
dropped from a height of 90 cm (3 ft) or more, seat
belt pretensioner (retractor assembly) is dropped from
a height of 30 cm (1 ft) or more), never attempt
disassembly or repair but replace it with a new one.
• When using electric welding, be sure to disconnect air bag (inflator) module connectors (driver, passenger,
side of both sides and curtain of both sides) and seat
belt pretensioner connectors (driver and passenger)
respectively.
• When applying paint around the air bag system related parts, use care so that the harness or
connector will not be expo sed to the paint mist.
• Never expose air bag system component parts directly to hot air (drying or baking the vehicle after
painting) or flames.
WARNING!
When performing service on or around air
bag system components or air bag wiring,
follow the procedures listed in “Disabling Air
Bag System” to temporarily disable the air
bag system.
Failure to follow procedures could result in
possible air bag system activation, personal
injury or unneeded air bag system repairs.

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The air bag system is designed to activate only in severe
frontal and sideward collisions. It is not designed to
activate in rear impacts, rollovers, or minor frontal and
sideward collisions, since it would offer no protection in
those types of accidents.
Air Bag System Input / Output TableS7RS0B8201002
I2RH0B820007-01
INPUT
Sensor in SDM and
forward-sensor Driver side-air bag
and Driver side
curtain-air bag
Passenger side-air bag
and Passenger side
curtain-air bag
Driver side-sensor Passenger side-sensor OUTPUT
Signal from
sensor Driver air bag, Passenger
air bag, Seat belt with
pretensioner (LH) and Seat
belt with pretensioner (RH)
I4RS0A820005-01

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Schematic and Routing Diagram
Air Bag System Wiring Circuit DiagramS7RS0B8202001
[A]
[B]“E13” “E44”, “G04” “G35” and "L03" \
"L41"
1
2 GRN/RED
GRN GRN/RED
GRN
BLU/RED YEL/RED BLU/RED
YEL/RED
GRN/ORN GRN/YEL
RED
13
PPL/WHT
9 7
8
5
6
10 “L10”
“L11”
“L04”
“G35” “G34”
“G33”
“G28”
“G32”
“L35”
L29-2
L29-27
L29-32 L29-5
L29-6 L29-4
L29-3
L29-8
L29-7
IG
ST
YEL L29-37ADS
WHT/RED
LT GRN/BLK L29-46
L29-47 SD+
SD-
11
WHT/GRN LT GRN
BLK L29-45
L29-44 WL
L29-28
E1 DP-
DP+ P- P+ D- D+
“G10”
“G04”“L29”
18
BLU/ORN
BLU/YEL “L36”
L29-9
L29-10
PP-
PP+
19 17
GRY/RED
GRY
L29-12
L29-11
DS- DS+ “L25”
20
BRN/WHT
BRN
L29-13
L29-14
PS- PS+ “L30”
21
YEL/GRN
YEL/BLU
L29-20
L29-19
DC- DC+ “L18”
22
BLK/YEL
BRN/YEL
L29-21
L29-22
PC- PC+ “L41”
2316
15
14
“L29”
SP+
SP-
“G26”“L32”
“L03”“E44”“E13”
12
ORN
PNK/BLK
GRY/RED
GRY L29-50
L29-51 FD+
FD-
3 4
YEL/BLK
YEL/BLK
GRN RED/BLK
I7RS0A820002-03
[A]: Shorting bar
8. BCM 17. Passenger air bag (inflator) module
[B]: Connector 9. To data link connector (DLC)18. Driver seat belt pretensioner
1. To battery 10. Driver side-sensor (if equipped)19. Passenger seat belt pretensioner
2. Ignition switch 11. Passenger side-sensor (if equipped) 20. Driver side-air bag (inflator) module (if equipped)
3. “AIR BAG” warning light 12. Forward-sensor 21. Passenger side-air bag (inflator) module (if equipped)
4. Light driver 13. Ground for air bag system 22. Driver side curtain-air bag (inflator) module (if equipped)
5. “METER” fuse 14. SDM 23. Passenger side curtain-air bag (inflator) module (if equipped)
6. “A/BAG” fuse 15. Contact coil
7. Junction block assembly 16. Driver air bag (inflator) module

Downloaded from www.Manualslib.com manuals search engine 8B-8 Air Bag System:
Terminal arrangement of SDM (viewed from harness side)
Connector “L29” (SDM connector)
1 2345678910
11
1213141516171819202122232425
272829303132333435363738394041424344454647484950
1
26
51
I7RS0A820003-02
1. SDM Connector “L29”
Terminal Terminal
symbol Circuit Terminal Terminal
symbol Circuit
L29-1 — — L29-27 IG Ignition switch (power source)
L29-2 WL “AIR BAG” warning right L29-28 E1 Ground
L29-3 D– Driver air bag (–) L29-29 — —
L29-4 D+ Driver air bag (+) L29-30 — —
L29-5 P+ Passenger air bag (+) L29-31 — —
L29-6 P– Passenger air bag (–) L29-32 ST DLC
L29-7 DP– Driver seat belt pretensioner (–) L29-33 — —
L29-8 DP+ Driver seat belt pretensioner (+) L29-34 — —
L29-9 PP+ Passenger seat belt pretensioner (+) L29-35 — —
L29-10 PP– Passenger seat belt pretensioner (–) L29-36 — — L29-11 DS– Driver side-air bag (–) (If equipped ) L29-37 ADS Air bag deployed signal for BCM
L29-12 DS+ Driver side-air bag (+) (If equipped) L29-38 — —
L29-13 PS+ Passenger side-air bag (+) (If
equipped) L29-39 — —
L29-14 PS– Passenger side-air bag (–) (If
equipped) L29-40 — —
L29-15 — — L29-41 — —
L29-16 — — L29-42 — —
L29-17 — — L29-43 — —
L29-18 — — L29-44 SP– Passenger side-sensor (–)
L29-19 DC– Driver side curtain-air bag (–) L29-45 SP+ Passenger side-sensor (+)
L29-20 DC+ Driver side curtain-air bag (+) L29-46 SD+ Driver side-sensor (+)
L29-21 PC+ Passenger side curtain-air bag (+) L29-47 SD– Driver side-sensor (–)
L29-22 PC– Passenger side curtain-air bag (–) L29-48 — —
L29-23 — — L29-49 — —
L29-24 — — L29-50 FD+ Forward-sensor (+)
L29-25 — — L29-51 FD– Forward-sensor (–)
L29-26 — — — — —

Downloaded from www.Manualslib.com manuals search engine Air Bag System: 8B-9
Component Location
Air Bag System Components, Wiring and Connectors LocationS7RS0B8203001
5
2
10
(a)(b)
(b)
(b)
(b)
(c)(d)
1
1
23
4
5
6
7
8
8
8
910
11
11
12
12
11
12
13
1313
15
14
I4RS0A820007-01
1. Passenger air bag (inflator) module
8. Side-air bag (inflator) module (if equipped)15. “AIR BAG” warning right
2. Driver air bag (inflator) module 9. Ground for air bag system: 23 N⋅m (2.3 kgf-m, 16.5 lb-ft)
3. Contact coil assembly 10. SDM: 9 N⋅m (0.9 kgf-m, 6.5 lb-ft)
4. Air bag harness in main harness 11. side-sensor (if equipped): 43 N⋅m (4.3 kgf-m, 31.5 lb-ft)
5. Forward-sensor 12. Seat belt pretensioner: 5.5 N⋅m (0.55 kgf-m, 4.0 lb-ft)

Downloaded from www.Manualslib.com manuals search engine Air Bag System: 8B-11
DTC TableS7RS0B8204003
SDM DTC4 1) Check DTC using SUZUKI scan tool referring to “DTC
Check”.
Is “NO CODES” displayed on SUZUKI scan tool? Air bag system is in
good condition.
An intermittent trouble
has occurred at some
place.
Check the connector
harness, etc. related to
the sensed DTC.
Refer to “Inspection of
Intermittent and Poor
Connections”.
Then clear DTC
(referring to “DTC
Clearance”.) and repeat
this flow.
5 Check DTC using SUZUKI scan tool, referring to “DTC Check”.
Is “NO CODES” displayed on SUZUKI scan tool? Substitute a known-
good SDM and recheck.
Check and repair
according to flow
corresponding to that
DTC.
Step Action Yes No
DTC
Diagnosis
—N orm al —
) B1013
SDM SDM fault Diagnose
trouble
according to
diagnostic flow
corresponding
to each code
No.
)
B1014 “AIR BAG”
warning right
circuit failure
) B1016 Power
source
voltage Too high
) B1017 Too low
) B1021
SDM Front air bag
module
exploded
) B1024 Driver side-air
bag module
exploded
) B1025 Passenger
side-air bag
module
exploded
) B1026 Pretensioner
activated
) B1027 Reusable
number
exceeded
) B1031
Driver air
bag circuit Resistance
high
) B1032 Resistance low
) B1033 Short to ground
) B1034 Short to power
circuit
)
B1041
Passenger
air bag
circuit Resistance
high
) B1042 Resistance low
) B1043 Short to ground
) B1044 Short to power
circuit
) B1051
Driver
pretensioner
circuit Resistance
high
) B1052 Resistance low
) B1053 Short to ground
) B1054 Short to power
circuit
) B1055
Passenger
pretensioner
circuit Resistance
high
) B1056 Resistance low
) B1057 Short to ground
) B1058 Short to power
circuit
) B1061
Driver side-
air bag Resistance
high
) B1062 Resistance low
) B1063 Short to ground
) B1064 Short to power
circuit
) B1065
Passenger
side-air bag Resistance
high
) B1066 Resistance low
) B1067 Short to ground
) B1068 Short to power
circuit
) B1071
Forward-
sensor
circuit Performance
problem
) B1072 Communicatio
n error
) B1073 Short to ground
) B1074 Short to power
circuit or open
DTC Diagnosis

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DTC CheckS7RS0B8204004
1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector (DLC) located on underside of instrument panel at
driver’s seat side.
Special tool
(A): SUZUKI scan tool
3) Turn ignition switch to ON position.
4) Read DTC according to instructions displayed on SUZUKI scan tool and print it or write it down. Refer
to SUZUKI scan tool operator’s manual for further
details.
If communication between scan tool and SDM is not
possible, check if scan tool is communicable by
connecting it to SDM in another vehicle. If
communication is possible in this case, scan tool is
in good condition. Then check data link connector
and serial data line (circuit) in the vehicle with which
communication was not possible. 5) After completing the check,
turn ignition switch to
OFF position and disconnect SUZUKI scan tool from
data link connector (DLC) (1).
DTC ClearanceS7RS0B8204005
1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector (DLC) (1) in the same manner as when making this
connection for DTC check.
Special tool
(A): SUZUKI scan tool
3) Turn ignition switch to ON position.
4) Erase DTC according to instructions displayed on
SUZUKI scan tool. Refer to SUZUKI scan tool
operator’s manual for further details.
5) After completing the clearance, perform “DTC Check” and confirm that normal DTC (NO CODES)
is displayed and not malfunction DTC.
6) Turn ignition switch to OFF position and disconnect SUZUKI scan tool from DLC.
NOTE
If DTC B1013, DTC B1 021 or DTC B1027 is
stored in SDM, it is not possible to clear DTC.

) B1081
Driver side-
sensor Performance
problem
Diagnose
trouble
according to
diagnostic flow
corresponding
to each code
No.
)
B1082 Communicatio
n error
) B1083 Short to ground
) B1084 Short to power
circuit or open
) B1085 Wrong
assembly
) B1091
Passenger
side-sensor Performance
problem
) B1092 Communicatio
n error
) B1093 Short to ground
) B1094 Short to power
circuit or open
) B1095 Wrong
assembly
) B1361
Driver side
curtain-air
bag circuit Resistance
high
) B1362 Resistance low
) B1363 Short to ground
) B1364 Short to power
circuit
) B1365
Passenger
side curtain-
air bag
circuit Resistance
high
) B1366 Resistance low
) B1367 Short to ground
) B1368 Short to power
circuit
DTC Diagnosis
1
(A)I4RS0A820008-01
1(A)I4RS0A820008-01

Downloaded from www.Manualslib.com manuals search engine 8B-76 Air Bag System:
NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components, ensure all components are properly mounted.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.

DTC B1071: Forward-Sensor Performance ProblemS7RS0B8204034
DTC Will Set when
SDM receives internal fault signal or wrong ID (Part No.) signal from forward-sensor.
DTC Troubleshooting1) Turn ignition switch OFF.
2) Replace forward-sensor referring to “Forward-Sensor Removal and Installation”.
3) Repeat “Air Bag Diagnostic System Check”.
DTC B1072: Forward-Sensor Communication ErrorS7RS0B8204035
DTC Will Set when
Forward-sensor abnormal signal is detected by SDM.
DTC Troubleshooting
1) Turn ignition switch OFF.
2) Replace forward-sensor referring to “Forward-Sensor Removal and Installation”.
3) Repeat “Air Bag Diagnostic System Check”.
NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.

DTC B1073: Forward-Sensor Circuit Short to GroundS7RS0B8204036
Wiring Diagram
1 2
3
GRN
RED
7
BLK
L29-27
L29-28 IG
E1
4
“L29”
“L04”
“G32”
“L29”5
ORN
PNK/BLK
ORN
PNK/BLKL29-50
FD+
L29-51
FD-6
“E13”
“L03”“E44”
I7RS0A820024-01
1. From main fuse 4. Junction block assembly 7. Ground for air bag system
2. Ignition switch 5. SDM
3. “A/BAG” fuse 6. Forward-sensor

Downloaded from www.Manualslib.com manuals search engine Air Bag System: 8B-77
CAUTION!
• Be sure to perform “Air Bag Diagnostic System Check” before starting diagnosis according to flow.
• When measurement of resistance or voltage is required in this flow, use a tester along with a correct terminal adapter from special tool (Connector test adapter kit).
• When a check for proper connection is required, refer to “Inspection of Intermittent and Poor Connections”.
• If there is open circuit in the air bag wire harnes s, connector or terminal is found damaged, replace
the wire harness, connector and terminal as an assembly.

DTC Will Set when
Forward-sensor abnormal signal is detected by SDM.
Flow Test Description
Step 1: Check for short circuit between forward-sensor circuit and ground.
Step 2: Check if malfuncti on is in forward-sensor.
DTC Troubleshooting
NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.

Step Action YesNo
1 1) Disconnect forward-sensor connector “E13”.
2) Disconnect SDM connector “L29”.
3) Check proper connection to SDM connector at terminals “L29-50” and “L29-51” or terminals.
4) Measure resistance between “L29-50” terminal and body ground, “L29-51” terminal and body ground.
Special tool
(A): 09932–76010
Is each measured resistance infinity? Go to Step 3.
“ORN” circuit or “PNK/
BLK” circuit shorted to
ground.
2 1) Check forward-sensor referring to “Forward-Sensor Inspection”.
Is it in good condition? Substitute a known-
good SDM and recheck.
Replace forward-sensor
referring to “Forward-
Sensor Removal and
Installation”. If DTC still
exists, substitute a
known-good SDM and
recheck.
"L29-50" "L29-51"
(A)
I7RS0A820025-01

Downloaded from www.Manualslib.com manuals search engine 8B-78 Air Bag System:
DTC B1074: Forward-Sensor Circuit Short to Power Circuit or OpenS7RS0B8204037
Wiring Diagram
CAUTION!
• Be sure to perform “Air Bag Diagnostic System Check” before starting diagnosis according to flow.
• When measurement of resistance or voltage is required in this flow, use a tester along with a correct terminal adapter from special tool (Connector test adapter kit).
• When a check for proper connection is required, refer to “Inspection of Intermittent and Poor Connections”.
• If there is open circuit in the air bag wire harnes s, connector or terminal is found damaged, replace
the wire harness, connector and terminal as an assembly.

DTC Will Set when
Forward-sensor abnormal signal is detected by SDM.
Flow Test Description
Step 1: Check for open circuit in forward-sensor circuit.
Step 2: Check for short circuit between forward-sensor circuit and ground.
Step 3: Check for short circuit between forw ard-sensor circuit and power supply circuit.
Step 4: Check if malfuncti on is in forward-sensor.
1
2
3
GRN
RED
7
BLK
L29-27
L29-28 IG
E1
4
“L29”
“L04”
“G32”
“L29”5
ORN
PNK/BLK
ORN
PNK/BLKL29-50
FD+
L29-51
FD-6
“E13”
“L03”“E44”
I7RS0A820024-01
1. From main fuse 4. Junction block assembly 7. Ground for air bag system
2. Ignition switch 5. SDM
3. “A/BAG” fuse 6. Forward-sensor