belt DAEWOO LACETTI 2004 Service Repair Manual

7B – 46IMANUAL CONTROL HEATING, VENTILATION AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
5. Use the snap ring pliers J–5403 to install the shaft
seal retaining ring with its flat side against the seal.
6. Remove any excess oil around the shaft and the
inside of the compressor housing neck.
7. Install the clutch plate and hub assembly. Refer to
”Clutch Plate and Hub Assembly” in this section.
8. Reposition the compressor in its mounting.
9. Adjust the tension on the serpentine accessory
drive belt.
10. Connect the negative battery cable.
11. Evacuate and recharge the A/C system. Refer to
”Discharging, Adding Oil, Evacuating, and Charging
Procedures for A/C System” in this section.
12. Perform a leak test of the system. Refer to ”Leak
Testing the Refrigerant System” in this section.
CONTROL VALVE ASSEMBLY
Tools Required
J–5403 Snap Ring Pliers
Removal Procedure
1. Recover the refrigerant. Refer to ”Discharging,
Adding Oil, Evacuating, and Charging Procedures
for A/C System” in this section.
2. Remove the control valve retaining ring using the
snap ring pliers J–5403.
3. Remove the control valve assembly.
Installation Procedure
1. Coat all the O–rings with clean polyalkaline glycol
(PAG) oil.
2. Push the control valve in place using thumb pres-
sure.
3. Use the snap ring pliers J–5403 to install the valve
retaining ring. The high point of the curved sides
must be against the valve housing. Be sure the re-
taining ring is properly seated in the ring groove.
4. Evacuate and recharge the A/C system. Refer to
”Discharging, Adding Oil, Evacuating, and Charging
Procedures for A/C System” in this section.

MANUAL CONTROL HEATING, VENTILATION AND AIR CONDITIONING SYSTEM 7B – 51
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
GENERAL INFORMATION
THE V5 A/C SYSTEM
The V5 variable displacement compressor along with the
thermal expansion valve on the evaporator, constitutes a
largely self–regulating system. There is no pressure cycl-
ing switch, no high–pressure cut–off switch and no low–
pressure cut–off switch. The compressor clutch is con-
trolled by the electronic control module (ECM), which
receives data from various engine systems and from a
pressure transducer located in the high–pressure refriger-
ant pipe. In normal operation, the clutch is engaged contin-
uously. Should one of the monitored conditions become
abnormal, the ECM will disengage the compressor clutch
until normal operation is restored. These conditions in-
clude the following:
S Wide–open throttle.
S High engine coolant temperature.
S High engine RPM.
S Refrigerant low pressure.
S Refrigerant high pressure.
The compressor clutch will remain disengaged until nor-
mal operation is established.
SYSTEM
COMPONENTS–FUNCTIONAL
Compressor
All compressors are belt–driven from the engine crank-
shaft through the compressor clutch pulley. The compres-
sor pulley rotates without driving the compressor shaft un-
til an electromagnetic clutch coil is energized. When
voltage is applied to energize the clutch coil, the clutch
plate and hub assembly is drawn rearward toward the
pulley. The magnetic force locks the clutch plate and
pulley together as one unit to drive the compressor shaft.
As the compressor shaft is driven, it compresses the low–
pressure refrigerant vapor from the evaporator into a
high–pressure, high–temperature vapor. The refrigerant
oil which is used to lubricate the compressor is carried with
the refrigerant. Refer to ”V5 Air Conditioning Compressor
Overhaul” in this section.
Condenser Core
The condenser assembly in front of the radiator consists
of coils which carry the refrigerant, and cooling fins that
provide the rapid transfer of heat. The air passing through
the condenser cools the high–pressure refrigerant vapor
and causes it to condense into a liquid.
Expansion Valve
The expansion valve is located with the evaporator core,
on the front passenger side fire wall.
The expansion valve can fail in three different positions:
open, closed, or restricted.
An expansion valve that fails in the open position will result
in a noisy A/C compressor or no cooling. The cause can
be a broken spring, a broken ball, or excessive moisture
in the A/C system. If the spring or the ball are found to be
defective, replace the expansion valve. If excessive mois-
ture is found in the A/C system, recycle the refrigerant.
An expansion valve that fails in the closed position will re-
sult in low suction pressure and no cooling. This may be
caused by a failed power dome or excessive moisture in
the A/C system. If the power dome on the expansion valve
is found to be defective, replace the expansion valve. If ex-
cessive moisture is found in the A/C system, recycle the
refrigerant.
A restricted expansion valve will result in low suction pres-
sure and no cooling. This may be caused by debris in the
refrigerant system. If debris is believed to be the cause, re-
cycle the refrigerant, replace the expansion valve, and re-
place the receiver–dryer.
Evaporator Core
The evaporator is a device which cools and dehumidifies
the air before it enters the vehicle. High–pressure liquid re-
frigerant flows through the expansion tube orifice and be-
comes a low–pressure gas in the evaporator. The heat in
the air passing through the evaporator core is transferred
to the cooler surface of the core, which cools the air. As the
process of heat transfer from the air to the evaporator core
surface is taking place, any moisture or humidity in the air
condenses on the outside surface of the evaporator core
and is drained off as water.
Receiver–Dryer
The sealed receiver–dryer assembly is connected to the
condenser outlet pipe. It acts as a refrigerant storing con-
tainer, receiving liquid, vapor, and refrigerant oil from the
evaporator.
At the bottom of the receiver–dryer is the desiccant, which
acts as a drying agent for the moisture that may have en-
tered the system. An oil bleed hole is located near the bot-
tom of the receiver–dryer outlet pipe to provide an oil re-
turn path to the compressor. The receiver–dryer is
serviceable only as an assembly.
Heater Core
The heater core heats the air before it enters the vehicle.
Engine coolant is circulated through the core to heat the
outside air passing over the fins of the core. The core is
functional at all times and may be used to temper condi-
tioned air in the A/C mode as well as in the heat or the vent
modes.

SECTION : 8A
SEAT BELTS
CAUTION : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool
or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help
prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.
TABLE OF CONTENTS
SPECIFICATIONS8A–1 . . . . . . . . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 8A–1. . . . . . . . . . .
SCHEMATIC AND ROUTING DIAGRAMS8A–2 . . . . .
Driver Seat Belt Warning 8A–2. . . . . . . . . . . . . . . . . . . .
DIAGNOSIS8A–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Seat Belt Warning 8A–3. . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND REPAIR8A–4 . . . . . . . . . . . . . . .
ON–VEHICLE SERVICE 8A–4. . . . . . . . . . . . . . . . . . . . .
Pretensioner Front Seat Belt 8A–4. . . . . . . . . . . . . . . .
Front Seat Belt Height Adjuster 8A–5. . . . . . . . . . . . . . Three–Point Rear Seat Belt (LH,CENTER, RH) 8A–6
Front Seat Belt Buckle 8A–7. . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION 8A–9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Seat Belt Warning 8A–9. . . . . . . . . . . . . . . . . . . .
Three–Point ELR Front Seat Belt With
Pretensioner 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three–Point CLR (ELR) Rear Outboard Seat
Belt 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational and Functional Checks 8A–9. . . . . . . . . .
Child Seat Tether Anchor 8A–9. . . . . . . . . . . . . . . . . . .
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
Child Seat Tether Anchor Bolt2518–
Front Seat Belt Height Adjuster Bolts2317–
Seat Belt Anchor Bolt3828–
Seat Belt Retractor Bracket Screws3–27
Seat Belt Retractor Bolt3828–

8A – 2ISEAT BELTS
DAEWOO V–121 BL4
SCHEMATIC AND ROUTING DIAGRAMS
DRIVER SEAT BELT WARNING

SEAT BELTS 8A – 3
DAEWOO V–121 BL4
DIAGNOSIS
DRIVER SEAT BELT WARNING
Seat Belt Warning Lamp Does Not Turn On at Any Time
StepActionValue(s)YesNo
1Check the seat belt warning fuse F4.
Is fuse F4 blown?–Go to Step 2Go to Step 3
21. Check for a short circuit and repair if neces-
sary.
2. Replace the fuse.
Is the repair complete?–System OK–
31. Turn the ignition ON.
2. Check the voltage at fuse F4.
Is the voltage equal to the specified value?11–14 vGo to Step 5Go to Step 4
4Repair the open power supply circuit for fuse F4.
Is the repair complete?–System OK–
51. Disconnect the seat belt switch connector (lo-
cated under the driver’s seat).
2. Connect a jumper between the terminals on the
harness side of the seat belt switch connector.
3. Turn the ignition ON.
Does the seat belt warning lamp turn on?–Go to Step 6Go to Step 7
6Replace the seat belt switch.
Is the repair complete?–System OK–
71. Remove the instrument cluster.
2. Check the seat belt warning lamp bulb.
Is the bulb OK?–Go to Step 9Go to Step 8
8Replace the warning lamp bulb.
Is the repair complete?–System OK–
9Repair the open circuit between instrument cluster
terminal A11 and ground.
Is the repair complete?–System OK–

8A – 4ISEAT BELTS
DAEWOO V–121 BL4
MAINTENANCE AND REPAIR
ON–VEHICLE SERVICE
PRETENSIONER FRONT SEAT BELT
Removal Procedure
1. Remove the plastic cap to reveal the lower B–pillar
seat belt anchor.
2. Remove the bolt and the lower B–pillar seat belt
anchor.
3. Remove the lower B–pillar trim panel. Refer to Sec-
tion 9G, Interior Trim.
4. Remove the plastic cap to reveal the upper B–pillar
seat belt anchor.
5. Remove the bolt and the upper B–pillar seat belt
anchor.
6. Remove the screws from the seat belt retractor
bracket.
7. Remove the bolt and the seat belt retractor.

SEAT BELTS 8A – 5
DAEWOO V–121 BL4
Installation Procedure
CAUTION : Failure to install the correct retractor
screw can cause the pretensioner seat belt to mal-
function in an accident, possibly resulting in person-
al injury.
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
1. Install the seat belt retractor with the bolt.
Tighten
Tighten the seat belt retractor bolt to 38 NSm (28 lb–
ft).
2. Install the seat belt retractor bracket with the screw.
Tighten
Tighten the seat belt bracket screw to 3 NSm (27 lb–
in).
3. Install the upper B–pillar seat belt anchor with the
bolt.
Tighten
Tighten the seat belt anchor bolt to 38 NSm (28 lb–ft).
4. Install the seat belt anchor plastic cap.
5. Install the lower B–pillar trim panel. Refer to Sec-
tion 9G, Interior Trim.
6. Install the lower B–pillar seat belt anchor with the
bolt.
Tighten
Tighten the seat belt anchor bolt to 38 NSm (28 lb–ft).
7. Install the seat belt anchor plastic cap.
FRONT SEAT BELT HEIGHT
ADJUSTER
Removal Procedure
1. Remove the upper B–pillar trim panel. Refer to
Section 9G, Interior Trim.
2. Remove the bolts and the seat belt height adjuster.

8A – 6ISEAT BELTS
DAEWOO V–121 BL4
Installation Procedure
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
1. Install the seat belt height adjuster with the bolts.
Tighten
Tighten the front seat belt height adjuster bolts to 23
NSm (17 lb–ft).
2. Install the upper B–pillar trim panel. Refer to Sec-
tion 9G, Interior Trim.
THREE–POINT REAR SEAT BELT
(LH,CENTER, RH)
Removal Procedure
1. Remove the back shelf panel. Refer to Section 9G,
Interior Trim.
2. Remove the rear seat belt retractor securing bolts
(LH, CENTER, RH) from the back panel.
3. Remove the rear seat cushion. Refer to Section 9H,
SEATS.
4. Remove the floor seat belt anchor bolts.
5. Remove the seat belt.

SEAT BELTS 8A – 7
DAEWOO V–121 BL4
Installation Procedure
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
1. Install the floor seat belt anchor bolts.
Tighten
Tighten the floor seat belt anchor bolt to 38 NSm (28
lb–ft).
2. Install the rear seat belt retractor bolts (LH, CEN-
TER, RH) on the back panel.
Tighten
Tighten the rear seat belt retractor bolts to 38 NSm (28
lb–ft).
3. Install the rear seat cushion. Refer to Section 9H,
SEATS.
4. Install the back shelf panel. Refer to Section 9G,
Interior Trim.
FRONT SEAT BELT BUCKLE
Removal Procedure
1. Remove the front seat belt bolt and washer.
2. In case of driver seat belt buckle, remove the elec-
trical connector.

8A – 8ISEAT BELTS
DAEWOO V–121 BL4
Installation Procedure
1. Install the front seat belt bolt and washer.
Tighten
Tighten the front seat belt bolt to 42 NSm (31 lb–ft).
2. In case of driver seat belt buckle, connect the elec-
trical connector.