2004 DAEWOO LACETTI clock

7B – 48IMANUAL CONTROL HEATING, VENTILATION AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
8. With the O–ring in place on the rear of the cylinder
assembly, locate the relief boss for the compressor
guide pin at the 6 o’clock position, directly above
the hole in the side of the rear head. Carefully lower
the cylinder and the front head assembly over the
guide pin to the rear head.
9. Press the cylinder and the compressor housing as-
sembly down onto the rear head using both hands.
10. Add the new through–bolt gasket to the through–
bolts and install it into the compressor assembly.
Four of the through–bolts must thread into the rear
head before removing the alignment rod.
Tighten
Alternately tighten the through–bolts in progressive
torque sequence to 10 NSm (89 lb–in).
11. Add new PAG refrigerant oil as determined in Step
1 of Removal Procedure.
12. Place the shaft nut on the shaft and rotate the com-
pressor shaft several times.
13. Perform a leak test on the compressor. Refer to
”Leak Testing (External)” in this section.
14. Install the clutch coil. Refer to ”Clutch Coil” in this
section.
15. Install the clutch rotor and bearing. Refer to ”Clutch
Rotor and Bearing” in this section.
16. Install the clutch plate and hub assembly. Refer to
”Clutch Plate and Hub Assembly” in this section.
17. Install the compressor. Refer to ”Compressor” in
this section.
18. Evacuate and recharge the A/C system. Refer to
”Discharging, Adding Oil, Evacuating, and Charging
Procedures for A/C System” in this section.
CYLINDER–TO–FRONT HEAD
O–RING
Tools Required
J–34993 Cylinder Alignment Rods
J–35372 Support Block
Removal Procedure
1. Recover the refrigerant. Refer to ”Discharging, Add-
ing Oil, Evacuating, and Charging Procedures for
A/C System” in this section.
2. Remove the compressor. Refer to ”Compressor” in
this section.
3. Drain the oil from compressor into a suitable con-
tainer. Measure and record the amount of oil
drained from the compressor. Discard all used oil.
4. Remove the clutch plate and hub assembly. Refer
to ”Clutch Plate and Hub Assembly” in this section.
5. Remove the clutch rotor and bearing. Refer to
”Clutch Rotor and Bearing” in this section.
6. Remove the clutch coil. Refer to ”Clutch Coil” in
this section.

MANUAL CONTROL HEATING, VENTILATION AND AIR CONDITIONING SYSTEM 7B – 49
DAEWOO V–121 BL4
7. Remove and discard the shaft seal parts. Refer to
”Shaft Seal Replacement” in this section.
8. Remove the compressor through–bolts. Remove
and discard the gaskets.
9. Using a wooden block and a plastic–headed ham-
mer, tap the compressor housing at the mounting
locations to disengage the housing from the com-
pressor cylinder.
Important : Note the assembly sequence of the thrust
washer and bearing for ease of assembly.
10. Remove the thrust washer and the bearing.
11. Remove and discard the compressor housing–to–
cylinder O–ring.
Installation Procedure
1. Rest the rear head on the support block J–35372.
Locate the control valve at the 6 o’clock position.
2. Install cylinder alignment rod J–34993 through the
11 o’clock and the 5 o’clock bolt holes.
3. Lubricate the new cylinder–to–compressor housing
O–ring with clean polyalkaline glycol (PAG) oil.
4. Install the new O–ring in the cylinder O–ring
groove.
5. Install the thrust washer and bearing in the same
order as they were removed.
6. Align the guide pin recess in the compressor hous-
ing with the guide pin. Press down on the compres-
sor housing with both hands to force it over the O–
ring on the cylinder assembly.
7. Add a new through–bolt gasket to the through–bolts
and install it into the compressor assembly. Four
through–bolts must thread into the rear head before
removing the guide pins.
Tighten
Alternately tighten the through–bolts in progressive
torque sequence to 10 NSm (89 lb–in).
8. Install a new shaft seal. Refer to ”Shaft Seal Re-
placement” in this section.
9. Add new PAG oil equal to the amount drained in
Step 3.
10. Install the clutch coil. Refer to ”Clutch Coil” in this
section.
11. Install the clutch rotor and bearing. Refer to ”Clutch
Rotor and Bearing” in this section.
12. Install the clutch plate and hub assembly. Refer to
”Clutch Plate and Hub Assembly” in this section.
13. Perform a leak test on the compressor. Refer to
”Leak Testing (External)” in this section.
14. Install the compressor. Refer to ”Compressor” in
this section.
15. Evacuate and recharge the A/C system. Refer to
”Discharging, Adding Oil, Evacuating, and Charging
Procedures for A/C System” in this section.

IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 37
DAEWOO V–121 BL4
IN–CAR TEMPERATURE SENSOR
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the instrument panel under cover. Refer to
Section 9G, Interior Trim.
3. Disconnect the electrical connector.
4. Remove the tube by turning it clockwise.
5. Remove the screws.
6. Remove the in–car sensor with the tube.
Installation Procedure
1. Install the in–car sensor.
2. Install the in–car sensor retaining screws and tight-
en.
3. Install the air inlet tube and connect the electrical
connector.
4. Install the instrument panel under cover. Refer to
Section 9G, Interior Trim.
5. Connect the battery negative cable.
SUN SENSOR
Removal Procedure
1. Disconnect the negative battery cable.
2. Gently pry up on the sun sensor to remove it.
3. Secure the electrical connector to prevent it from
falling beneath the dash.
4. Disconnect the electrical connector and remove the
sun sensor.

8B – 2ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
DTC 80 Driver Side Airbag Sensor Loop Is
Shorted To Power 8B–72. . . . . . . . . . . . . . . . . . . . . . .
DTC 81 Driver Side Airbag Sensor Loop Is
Shorted To Ground 8B–74. . . . . . . . . . . . . . . . . . . . . .
DTC 82 Driver Side Airbag Sensor Communication
Error 8B–76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 83 Driver Side Airbag Sensor Failure 8B–78. . .
DTC 84 Passenger Side Airbag Sensor Loop Is
Shorted To Power 8B–80. . . . . . . . . . . . . . . . . . . . . . .
DTC 85 Passenger Side Airbag Sensor Loop Is
Shorted To Ground 8B–82. . . . . . . . . . . . . . . . . . . . . .
DTC 86 Passenger Side Airbag Sensor
Communication Error 8B–84. . . . . . . . . . . . . . . . . . . .
DTC 87 Passenger Side Airbag Sensor Failure 8B–86
MAINTENANCE AND REPAIR8B–88 . . . . . . . . . . . . . .
ON–VEHICLE SERVICE 8B–88. . . . . . . . . . . . . . . . . . . .
Disabling the Supplemental Inflatable
Restraints(SIR) 8B–88. . . . . . . . . . . . . . . . . . . . . . . . .
Enabling the Supplemental Inflatable
Restraints(SIR) 8B–88. . . . . . . . . . . . . . . . . . . . . . . . .
Handling, Installation and Diagnosis 8B–89. . . . . . . . .
Repairs and Inspections Required After an
Accident 8B–89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accident With Deployment Components
Replacements 8B–90. . . . . . . . . . . . . . . . . . . . . . . . . . Accident Without Deployment Component
Inspection 8B–90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sensing and Diagnostic Module (SDM) 8B–90. . . . . .
Driver Airbag Module 8B–91. . . . . . . . . . . . . . . . . . . . . .
Clock Spring 8B–92. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Spring Alignment 8B–93. . . . . . . . . . . . . . . . . . . .
Passenger Airbag Module 8B–94. . . . . . . . . . . . . . . . . .
Side Airbag Sensor 8B–95. . . . . . . . . . . . . . . . . . . . . . .
Front Seat Belt Pretensioner 8B–95. . . . . . . . . . . . . . .
Airbag Module Deployment (Inside of Vehicle) 8B–95
Airbag Module Deployment (Outside of Vehicle) 8B–97
Deployed Airbag Module Disposal Procedure 8B–98.
SIR Wiring Repair 8B–99. . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION8B–100 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplemental Inflatable Restraints(SIR) 8B–100. . . .
Airbag Modules 8B–100. . . . . . . . . . . . . . . . . . . . . . . . . .
Front Seat Belt Pretensioners 8B–101. . . . . . . . . . . . .
Sensing and Diagnostic Module (SDM) 8B–101. . . . .
Airbag Warning Lamp 8B–101. . . . . . . . . . . . . . . . . . . .
Clock Spring 8B–101. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Harness Connectors 8B–102. . . . . . . . . . . . . . .

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 3
DAEWOO V–121 BL4
SPECIFICATIONS
GENERAL SPECIFICATIONS
ApplicationDescription
Airbag System Deployment Time<20ms
Detection Time<5ms
Operating Temperature–40°C~+85°C
Storage Temperature–40°C~+90°C
Voltage Range9~16 V
Current consumption5ms after ignition switch ON <1A
5ms
5sec<300Ma, after 5sec.<100Ma
Acceleration Range+/– 50g
Maximum Acceleration+/– 600g pulse
Voltage Ramp0.2~2.0 V/s
Energy Reservation150ms after battery disconnection
Inflator Ignition Energy4.3mj
Squib Resistance2.15 +/– 0.35Ω
Airbag Warning Lamp ON Time(When Ignition ON)6sec
FASTENER TIGHTENING SPECIFICATIONS
ApplicationN·mLb–FtLb–In
Clock Spring Retaining Screws3–27
Driver Airbag Module Mounting Bolts11–97
Passenger Airbag Module Mounting Bolts8–71
Sensing and Diagnostic Module(SDM) Mounting Bolts10–89
SPECIAL TOOLS
SPECIAL TOOLS TABLE
Scan Tool

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 5
DAEWOO V–121 BL4
SIR COMPONENT LOCATOR
1. Driver Airbag Module
2. Clock Spring
3. Sensing And Diagnostic Module(SDM)4. Passenger Airbag Module
5. Side Airbag Module
6. Side Airbag Sensor

8B – 12ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
J3B18B04
1 2
21
SDM Driver Airbag Module
Clock SpringDK GRN/
WHT
BLK/WHT
G202
10 11146
Passenger Airbag Module
BRN
BRNDK BLU
WHT/
BLK
DK BLU
13
12
DIAGNOSTIC TIC TROUBLE CODE (DTC) 1
DRIVER AIRBAG DEPLOYMENT LOOP RESISTANCE IS
HIGH
Circuit Description
When the ignition switch is turned to ON, the sensing and
diagnostic module(SDM) will perform turn–on test to diag-
nose critical malfunctions within SDM itself.
Upon passing these test ignition and deployment loop volt-ages are measured to ensure that they are within their nor-
mal voltage ranges. The SDM monitors the voltages at the
driver low and the passenger low to detect shorts to
ground or voltage in the deploy loops.
DTC 1 Will Set When
S The resistance of driver airbag deployment loop is
higher than 4.7 ohms.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 13
DAEWOO V–121 BL4
DTC 1
Driver Airbag Deployment Loop Resistance Is High
CAUTION : The sensing and diagnostic module(SDM)
can maintain sufficient voltage to deploy the airbags
and pretensioners for 1 minute after the ignition is
OFF and the fuse has been removed. If the airbags
and pretensioners are not disconnected, do not be-
gin service until one minute has passed after discon-
necting power to SDM. Otherwise, injury could result.
CAUTION : During service procedure, be very careful
when handling the SDM. Never strike or jar the SDM.Never power the supplemental inflatable re-
straints(SIR) when the SDM is not rigidly attached to
the vehicle. All SDM mounting bolts must be carefully
tightened , and the arrow on the SDM must be point
toward the front of the vehicle to ensure proper op-
eration of the SIR. The SDM could be activated if it is
powered when it is not rigidly attached to the vehicle,
resulting in unexpected deployment and possible in-
jury.
Step
ActionValue(s)YesNo
1Perform the SIR Diagnostic System Check.
Is the SIR Diagnostic System Check completed?–Go to Step 2–
2Visually inspect the connector and the wiring of driv-
er airbag. Is the connector disconnected?–Connect the
connector and
go to Step 1Go to Step 3
31. Confirm the ignition switch ”OFF”.
2. Remove the driver airbag module.
3. Disconnect the connector of SDM wiring.
4. Check the resistance between the terminal
10,11 of SDM and the terminal 1,2 of driver
airbag module. Is the resistance about 0(zero)
?
0 WGo to Step 4Go to Step 5
41. Replace the SDM.
2. Confirm the ignition switch ”ON”.
3. Erase the DTC using scan tool.
4. Perform the SIR Diagnostic System Check.
5. If the DTC is not removable, then replace the
driver airbag module.–––
51. Remove the connector from the clock spring
wiring.
2. Check the resistance between the terminal
10,11 of SDM and the terminal 1,2 of clock
spring. Is the resistance about 0(zero) ?
0 WGo to Step 6Go to Step 7
61. Replace the clock spring–––
71. Replace the airbag wiring.–––