Lower SUZUKI SWIFT 2008 2.G Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine 7B-64 Air Conditioning System: Automatic Type
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC B1552: Serial Communication Signal MalfunctionS7RS0B7224020
DTC Detecting Condition and Trouble AreaDTC detecting condition Trouble area
Serial communication signal is higher than or lower than specified value for
specified time continuously. • Serial communication line of BCM
• BCM (included in junction block
assembly)
• Information display
• HVAC control module
Step Action YesNo
1 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Disconnect connector from information display.
3) Turn ignition switch ON and check DTC.
Is there DTC B1551? Go to Step 2.
Information display
faulty.
2 Wire harness check
1) Disconnect connectors from BCM and HVAC control
module.
2) Measure resistance between “G37-11” terminal of BCM connector and “G51-7” terminal of HVAC control module
connector.
Is resistance below 5
Ω? Go to Step 3. “YEL” wire open or high
resistance circuit.
3 Wire harness check
1) Measure resistance between “G51-7” terminal of HVAC
control module connector and vehicle body ground.
Is resistance infinity? Go to Step 4. “YEL” wire shorted to
ground circuit.
4 Wire harness check
1) Measure voltage between “G51-7” terminal of HVAC
control module connector and vehicle body ground with
ignition switch turned ON.
Is voltage 0 V? Go to Step 5. “YEL” wire shorted to
other circuit.
5 Serial communication signal check
1) Connect connectors to BCM and HVAC control module.
2) Using oscilloscope, check that serial communication
signal is outputted referring to “Reference waveform
No.8” of “Inspection of BCM and its Circuits in Section
10B”.
Is serial communication signal outputted at “G37-11”
terminal of BCM connector? HVAC control module
faulty.
BCM (included in
junction block
assembly) faulty.
DTC detecting condition
Trouble area
Data received by HVAC control module from BCM is erroneous continuously. • BCM (included in junction block assembly)
• HVAC control module

Downloaded from www.Manualslib.com manuals search engine 7B-68 Air Conditioning System: Automatic Type
G51-8 BLU/REDBlower motor control
voltage feedback 10 – 14 V Ignition switch turned ON, blower speed selector OFF
About 8.5 V Ignition switch turned ON, blower speed selector 1st
position
About 6.5 V Ignition switch turned ON, blower speed selector 2nd
position
About 5.5 V Ignition switch turned ON, blower speed selector 3rd
position
About 4.0 V Ignition switch turned ON, blower speed selector 4th
position
About 3.0 V Ignition switch turned ON, blower speed selector 5th
position
About 2.0 V Ignition switch turned ON, blower speed selector 6th
position
About 1.0 V Ignition switch turned ON, blower speed selector 7th
position
Below 1.0 V Ignition switch turned ON, blower speed selector HIGH
position
G51-9 GRY Blower motor controller 0 – 1 V
Ignition switch turned ON, blower speed selector OFF
position
2 – 3 V Ignition switch turned ON, blower speed selector
between 1st and HIGH position
G51-10 BLK/RED Rear defogger indicator 0 – 1 V Ignition switch turned ON, rear defogger switch OFF
10 – 14 V Ignition switch turned ON, rear defogger switch ON
G51-11 RED/YEL Illumination switch 0 – 1 V Ignition switch turned ON, lighting switch OFF position
10 – 14 V Ignition switch turned ON, lighting switch ON position
G51-12 BLK/YEL Illumination ground 0 – 1 V Full-time
G51-13 — — — —
G51-14 — — — —
G51-15 RED Air intake actuator
(RECIRCULATION AIR) 0 – 1 VIgnition switch turned ON, air intake selector is
recirculation air mode or air intake actuator is working
in operation to recirculation air position or fresh air
position.
10 – 14 V Ignition switch turned ON, ai
r intake selector is fresh
air mode (air intake actuator fresh air position).
G51-16 GRN/RED Air intake actuator
(MIX AIR) 10 – 14 V
Ignition switch turned ON, air intake actuator is
recirculation air or fresh air position.
0 – 1 V Ignition switch turned ON, air intake actuator is mix air
position or air intake actuator is working in operation to
recirculation air position or fresh air position.
G51-17 GRN Air intake actuator
(FRESH AIR) 0 – 1 V
Ignition switch turned ON, ai
r intake selector is fresh
air mode or air intake actuator is working in operation
to recirculation air position or fresh air position.
10 – 14 V Ignition switch turned ON, air intake selector is
recirculation air mode (air intake actuator recirculation
air position).
G51-18 GRN/WHT A/C switch signal Refer to “Inspe ction of BCM and its Circuits in Section 10B”
G51-19 BLU/WHT Electric load signal for
blower motor 10 – 14 V
Ignition switch turned ON, blower speed selector OFF
or between 1st and 5th position
0 – 2 V Ignition switch turned ON, blower speed selector
between 6th and HIGH position
G51-20 BRN Rear defogger switch 0 – 1 V
Ignition switch turned ON, rear defogger switch ON
(rear defogger switch is kept in push) position
4 – 6 V Ignition switch turned ON, rear defogger switch OFF
position
Terminal Wire Color Circuit
Normal
Vo l ta g e Condition

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ECM Voltage Values Table for Relation of A/C Control
Repair Instructions
Operation Procedure for Refrigerant ChargeS7RS0B7226001
Refer to “Operation Procedure for Refrigerant Charge”.Terminal Wire Color Circuit Normal Value Condition
C37-14 GRY/RED Output of 5 V power
source 4.5 – 5.5 V Ignition switch turned ON
C37-15 BLK Ground for ECM Below 0.3 V Ignition switch turned ON
C37-24 LT GRN Engine coolant temp.
(ETC) sensor signal 3.3 – 3.8 V Ignition switch turned ON, ECT at 0
°C (32 ° F)
1.38 – 1.72 V Ignition switch turned ON, ECT at 50 °C (122 °F)
C37-30 BLK Ground for ECM Below 0.3 V Ignition switch turned ON
C37-55 ORN Ground for sensors Below 0.3 V Ignition switch turned ON
C37-58 BLK/ORN Ground for ECM Below 0.3 V Ignition switch turned ON E23-1 BLK/RED Main power supply 10 – 14 V Ignition switch turned ON
E23-3 RED CAN (high)
communication line
(active high signal)
for BCM and
combination meterRefer to “DTC P2101: Throttle Actu
ator Control Motor Circuit Range /
Performance in Section 1A”
E23-16 BLK/RED Main power supply 10 – 14 V Ignition switch turned ON
E23-18 WHT CAN (low)
communication line
(active low signal) for
BCM and
combination meterRefer to “DTC P2101: Throttle Actu
ator Control Motor Circuit Range /
Performance in Section 1A”
E23-19 BLU/WHT Electric load signal
for blower motor 10 – 14 V
Ignition switch turned ON, blower speed selector
OFF or between 1st and 5th position
0 – 1 V Ignition switch turned ON, blower speed selector
between 6th and HIGH position
E23-46 LT GRN Radiator fan relay
No.1 output 10 – 14 V
Ignition switch turned ON, engine coolant temp.:
below 95
°C (203 ° F), or A/C refrigerant pressure:
below 600 kPa (87 psi).
0 – 2 V Ignition switch turned ON, engine coolant temp.:
97.5
°C (207.5 °F) or higher, or A/C refrigerant
pressure: 1100 kPa (159.5 psi) or higher.
E23-47 GRY A/C compressor relay
output 10 – 14 V Engine running, A/C request signal high input
0 – 1 V Engine running, A/C request signal low input
E23-48 GRN Radiator fan relay
No.2 and No.3 output 10 – 14 V
Ignition switch turned ON, engine coolant temp.:
below 100
°C (212 °F), or A/C refrigerant
pressure: below 1200 kPa (174 psi).
0 – 2 V Ignition switch turned ON, engine coolant temp.:
102.5
°C (216.5 ° F) or higher, or A/C refrigerant
pressure: 1500 kPa (217.5 psi) or higher.
E23-55 RED A/C refrigerant
pressure sensor
signal 1.46 – 1.71 V
Engine running, A/C refrigerant pressure at 0.8
MPa (8.0 kg/cm
2) (A/C refrigerant pressure
measured by manifold gauge)
2.55 – 2.80 V Engine running, A/C refrigerant pressure at 1.6
MPa (16.0 kg/cm
2) (A/C refrigerant pressure
measured by manifold gauge)
E23-60 BRN/WHT Main power supply
relay output 10 – 14 V Ignition switch turned OFF
0 – 2 V Ignition switch turned ON

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-73
HVAC Unit Removal and InstallationS7RS0B7226003
Refer to “HVAC Unit Removal and Installation”.
Temperature Control Actuator Removal and
Installation
S7RS0B7226004
Removal1) Disconnect negative (–) cable at battery.
2) Remove steering column hol e cover from instrument
panel.
3) Remove foot duct from HVAC unit.
4) Disconnect temperature control actuator connector (1).
5) Detach temperature control actuator rods (2) from linkage (3).
6) Remove temperature control actuator (4) from HVAC unit.
Installation
Reverse removal procedure.
Temperature Control Actuator InspectionS7RS0B7226005
1) Remove temperature control actuator from HVAC unit referring to “Temperature Control Actuator
Removal and Installation”.
2) Connect connector to temperature control actuator.
3) Set temperature selector of HVAC control module to MAX HOT position with ignition switch ON, and
make sure if the position of actuator lever is MAX
HOT position (A).
4) Turn ignition switch OFF, and then disconnect connector from temperature control actuator.
5) Measure resistance between terminal “3” and “5”.
Temperature control actuator resistance between
terminal “3” and “5” (MAX HOT position)
Approximately 2.5 k Ω at 25 °C (77 °F) 6) Connect connector to tem
perature control actuator.
7) Set temperature selector of HVAC control module to MAX COOL position with ignition switch ON, and
make sure if the position of actuator lever is MAX
COOL position (B).
8) Turn ignition switch OFF, and then disconnect connector from temperature control actuator.
9) Measure resistance between terminal “3” and “5”
Temperature control actuator resistance between
terminal “3” and “5” (MAX COOL position)
Approximately 4.8 k Ω at 25 °C (77 °F)
If check result is not satisfactory, replace the actuator
with new one.
2. Blower upper case 9. Blower motor controller 16. Evaporator 23. Temperature control actuator
3. Air intake control actuator 10. Blower lower case 17. O-ring24. Air flow control actuator
4. Air filter (if equipped) 11. Blower motor 18. Expansion valve25. Inside air temperature sensor
5. Heater unit upper case 12. Heater unit lower case 19. Evaporator temperature sensor 26. Aspirator hose
6. Foot duct 13. Heater core 20. Packing : Do not reuse.
7. Air flow control door assembly 14. Temperature control links 21. Filter cover
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I5RS0A722020-02
I5RS0A722021-03
I5RS0A722022-03

Downloaded from www.Manualslib.com manuals search engine 7B-76 Air Conditioning System: Automatic Type
Actuator Linkage InspectionS7RS0B7226010
• Check if each actuator linkage operates smoothly.
• Check actuator rod for bend.
• Check each actuator linkage for breakage.
• Make sure if there is not any obstruction in operating range of actuator linkage.
If any malfunction is found, repair or replace faulty
part(s).
Blower Motor Controller Removal and
Installation
S7RS0B7226011
Refer to “Blower Motor Resistor Removal and
Installation in Section 7A”.
Blower Motor Controller InspectionS7RS0B7226012
1) Check internal circuit of controller for resistance as follows.
a) Measure resistance between “1” terminal and “2” terminal of blower motor controller.
Blower motor cont roller resistance
“1” – “2”: approximately 10 k Ω at 25 °C (77 °F)
If resistance does not meet above specification,
replace blower motor controller.
b) Using ohmmeter, connect its positive terminal to “3” terminal of blower motor controller and
negative terminal to “1” terminal of blower motor
controller and check that there is no continuity.
2) Check controller for operation as follows. a) Using service wire, connect battery positive terminal to “3” terminal of blower motor controller
and battery negative terminal to “1” terminal of
blower motor controller.
b) Using bulb (3.4 W) (5) and service wire, connect battery positive terminal to “3” terminal of blower
motor controller as shown figure.
c) Arrange 3 new 1.5 V batteries (6) in series (check that total voltage is 4.5 – 5.0 V) and
connect its positive term inal to “2” terminal of
blower motor controller and negative terminal to
“1” terminal of blower motor controller.
Then, check that bulb lights. If bulb does not light
under the above conditions, replace blower
motor controller.
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1
2
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1
3
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6I5RS0A722026-01

Downloaded from www.Manualslib.com manuals search engine 8A-3 Seat Belts:
Repair Instructions
Front Seat Belt ComponentsS7RS0B8106001
WARNING!
• Never attempt to disassemble or repair the seat belt pretensioner (retractor assembly). If any abnormality is found, be sure to replace it with new one as an assembly.
• Be sure to read “Precautions on Service and Diagnosis of Seat Belt” before starting to work and observe every precaution during work. Neglecting them may result in personal injury or
unactivation of the seat belt pretensioner when necessary.

(a)
(a)
(a)
1
2
3
5
a)
b)
(a)
3
7
(b)
6
2
4
(a)
7
810
9
7 2 11
9
1012
I6RS0C810001-01
1. Upper anchor
6. Shoulder adjuster mounting bolt
: Tighten upper bolt first, then tighten lower bolt. 11. Spring washer
2. Lower anchor 7. Anchor bolt
: Tighten upper bolt first, then tighten lower bolt. 12. Wave washer
3. Retractor assembly 8. Cushion : 43 N⋅m (4.3 kgf-m, 31.5 lb-ft)
4. Buckle 9. Spacer : 5.5 N⋅m (0.55 kgf-m, 4.0 lb-ft)
5. Yellow connector (for seat belt pretensioner) 10. Washer

Downloaded from www.Manualslib.com manuals search engine Seat Belts: 8A-4
Front Seat Belt Removal and InstallationS7RS0B8106002
WARNING!
• Never attempt to disassemble or repair the seat belt pretensioner (retractor
assembly). If any abnormality is found, be
sure to replace it with new one as an
assembly.
• Be sure to read “Precautions on Service and Diagnosis of Seat Belt” before starting
to work and observe every precaution
during work. Ne glecting them may result in
personal injury or una ctivation of the seat
belt pretensioner when necessary.

Removal
1) Disconnect negative (–) cable at battery.
2) Disable air bag system. Refer to “Disabling Air Bag System in Section 8B”.
3) Remove center pillar lower trim.
4) Disconnect Yellow connector (1) from seat belt pretensioner (2).
a) Release locking of lock button (3).
b) After unlocked, disconnect to connector.
5) Remove front seat belts from the vehicle.
Installation
Install in reverse order of removal, noting the following.
• Seat belt anchor bolts should have an unified fine thread (7/16-20 UNF). Under no circumstances
should any different sized or metric screw threads be
used.
• Connect Yellow connector (1) to seat belt pretensioner securely.
a. Connect connector.
b. Lock connector with lock slider (2). • Enable air bag system. Refer to “Enabling Air Bag
System in Section 8B”.
Front Seat Belt InspectionS7RS0B8106003
WARNING!
• Never attempt to disassemble or repair the seat belt pretensioner (retractor
assembly). If any abnormality is found, be
sure to replace it with new one as an
assembly.
• Be sure to read “Precautions on Service and Diagnosis of Seat Belt”, before
starting to work and observe every
precaution during work. Neglecting them
may result in personal injury or
unactivation of the seat belt pretensioner
when necessary.
• Never measure resistance of pretensioner or disassemble it. Otherwise, personal
injury may result.

CAUTION!
If seat belt pretensioner (retractor assembly)
was dropped from a height of 30 cm (1 ft) or
more, it should be replaced.

Seat belts and attaching parts can affect the vital
components and systems of a vehicle.
Therefore, they should be inspected carefully and
replaced with genuine parts only.
a
b
21 3I6RS0B810003-01
1
1
2
b)
a)
I6RS0B810004-01
I2RH01810004-01

Downloaded from www.Manualslib.com manuals search engine Seat Belts: 8A-6
Rear Seat Belt ComponentsS7RS0B8106004
WARNING!
Be sure to read “Precautions on Service and Diagnosis of Seat Belt” before starting to work and
observe every precaution during work.

(b)
(a)
(a)
(a)
(a)
14
4
5
62
1
7
(a)
(a)
3
8
1
10
3
11911(a)
12
13
12
13
15
15
I6RS0C810002-01
1. Upper anchor 7. Rear seat belt 13. Anchor bolt
: Tighten retractor mounting bolts first, then
tighten anchor bolt.
2. Lower anchor 8. Bush 14. Center retractor assembly
3. Side retractor assembly 9. Spacer 15. Center retractor mounting bolt
: Tighten lower bolt first, then tighten upper bolt.
4. Rear center seat belt (if equipped) 10. Spring washer : 43 N⋅m (4.3 kgf-m, 31.5 lb-ft)
5. Buckle for rear seat belt 11. Washer : 5.5 N⋅m (0.55 kgf-m, 4.0 lb-ft)
6. Buckle for rear center seat belt (if equipped) 12. Side retractor mounting bolt
: Tighten upper bolt first, then tighten lower bolt.

Downloaded from www.Manualslib.com manuals search engine 8A-7 Seat Belts:
Rear Seat Belt Removal and InstallationS7RS0B8106005
WARNING!
Be sure to read “Precautions on Service and
Diagnosis of Seat Belt” before starting to
work and observe every precaution during
work.

Removal1) Fold rear seats referring to “Folding Rear Seats” in Owners Manual.
2) Remove rear side sill scuff (1), quarter lower trim (2)
and quarter upper trim (3).
3) Remove rear seat belt referring to “Rear Seat Belt Components”. Installation
Reverse removal procedure for installation noting the
following.
• Seat belt anchor bolts should have an unified fine
thread (7/16-20 UNF). Under no circumstances
should any different sized or metric screw threads be
used.Rear Seat Belt InspectionS7RS0B8106006
WARNING!
Be sure to read “Precautions on Service and
Diagnosis of Seat Belt” before starting to
work and observe every precaution during
work.

• Check the rear seat belt in the same way as “Front Seat Belt Inspection”.
• As to seat belts with A-ELR, check them as follows. – With vehicle at stop, pull seat belt all the way out, let it retract a little and try to pull it. It should not be
pulled out, that is, it should be locked where
retracted.
– Let seat belt retract to its original state. Next, pull it
half way out, let it retrac t a little and try to pull it
again. It should be pulled out smoothly, that is it
should not be locked at this time.
Specifications
Tightening Torque SpecificationsS7RS0B8107001
NOTE
The specified tightening torque is also described in the following.
“Front Seat Belt Components”
“Rear Seat Belt Components”

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fasteners Information in Section 0A”.
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2
1
I4RS0A810004-01

Downloaded from www.Manualslib.com manuals search engine Air Bag System: 8B-3
• Never attempt disassembly of the air bag (inflator) modules.
• If any abnormality is found, be sure to replace it with
new one as an assembly.
• When an abnormality is noted as existing in the live (undeployed) air bag (inflator) module, be sure to
deploy it before discarding it.
• When grease, cleaning agent, oil, water, etc., got on the air bag (inflator) modules (driver, passenger, side
of both sides and curtain of both sides), wipe it off
immediately with a dry cloth.
• If air bag (inflator) module was dropped from a height of 90 cm (3 ft) or more, it should be replaced with a
new one as an assembly.
WARNING!
• For handling and storage of a live air bag (inflator) module, select a place where the
ambient temperature below 65 °C (150 ° F),
without high humidity and away from
electric noise.
• When carrying a live air bag (inflator) module, make sure the bag opening is
pointed away from you. In case of an
accidental deployment, the bag will then
deploy with minimal chance of injury.
Never carry the air bag (inflator) module by
the wires or connector on the underside of
the module.
Otherwise, personal injury may result.

WARNING!
When placing a live air bag (inflator) module
on bench or other surface, always face the
bag up, away from the surface. As the live
passenger air bag (inflator) module must be
placed with its bag (trim cover) facing up,
place it on the workbench with a slit (1) or
use the workbench vise (2) to hold it securely
at its lower mounting bracket (3).
It is also prohibited to place anything on top
of the trim cover and stack air bag (inflator)
modules.
This is necessary so that a free space is
provided to allow the air bag to expand in the
unlikely event of accidental deployment.
Otherwise, personal injury may result.

Live (Inactivated) Seat Belt Pretensioner
Special care is necessary when handling and storing a
live (inactivated) seat belt pretensioners.
Also, when the seat belt pretensioners activate, gas is
generated and the seat belt (1) is retracted into the
retractor assembly (2) quickly.
Note, therefore, that if they activate accidentally, the seat
belt pretensioners and other object(s) around them may
be thrown through the air.
I4RS0A820002-01
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I3JA01820043-01