DAEWOO LACETTI 2004 Service Repair Manual

STEERING WHEEL AND COLUMN 6E – 17
DAEWOO V–121 BL4
Installation Procedure
Important : For proper installation of the steering column,
be sure the steering wheel spokes are centered diagonally
and pointed downward and the front wheels are positioned
in the straight–ahead position.
1. Carefully guide the steering shaft into the intermedi-
ate shaft universal joint.
Important : Provide support for the steering column as-
sembly until the mounting nuts are fastened. Do not let the
steering column assembly hang unsupported.
2. Install the pinch bolt into the non–threaded hole of
the flange.
Tighten
Tighten the steering shaft universal joint pinch bolt to
25 NSm (18 lb–ft).
3. Install the bolts and nuts for the front bracket of the
steering column jacket assembly.
Tighten
Tighten the steering column jacket assembly front
bracket bolts to 22 NSm (16 lb–ft).
4. Install the nuts for the rear bracket of the steering
column jacket assembly.
Tighten
Tighten the steering column jacket assembly rear
bracket nuts to 22 NSm (16 lb–ft).
5. Connect the speed sensitive steering electrical con-
nector.

6E – 18ISTEERING WHEEL AND COLUMN
DAEWOO V–121 BL4
6. Connect the ignition switch electrical connection.
7. Connect the airbag electrical connections.
8. Install the switch levers. Refer to ”Turn Signal
Switch and Lever” and ”Wiper Switch and Lever” in
this section.
9. Install the immobilizer module. Refer to Section 9T,
Remote Keyless Entry and Anti–theft System.
10. Install the lower instrument trim panels. Refer to
Section 9E, Instrumentation/Driver Information.
11. Install the upper and the lower steering column cov-
er panel with the screws..
Tighten
Tighten the upper and the lower steering column pan-
el screws to 2.5 NSm (22 lb–in).
12. Inspect the steering wheel in a straight–ahead posi-
tion. Refer to Section 6C, Power Steering Gear.
13. Connect the negative battery cable.

STEERING WHEEL AND COLUMN 6E – 19
DAEWOO V–121 BL4
UNIT REPAIR
TILT STEERING COLUMN
The(tilt) steering column is not unit repair serviceable. If
the(tilt) steering column is defective, the(titlt) steering col-
umn asembly should be replaced.

6E – 20ISTEERING WHEEL AND COLUMN
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
STEERING WHEEL AND COLUMN
CAUTION : To ensure the energy–absorbing action of
the steering column, it is important to use only the
specified screws, bolts, and nuts, tightened to the
specified torque.
In addition to the steering function, the steering column
provides safety and security.
The energy–absorbing column is designed to compress in
a front–end collision to lessen the chance of driver injury.
The ignition switch and the lock are mounted on the col-
umn, allowing the ignition and steering operations to be
locked to inhibit theft of the car.
The column levers trigger the turn signals, the headlight
beams, and the windshield washer and wipers.The tilt steering column uses telescopic function to allow
the steering wheel to tilt up and down in and out. This en-
ables the driver to adjust the steering wheel to a comfort-
able position.
Notice : Apply a thin coat of lithium grease to all friction
points when reassembling.
The column may be disassembled and reassembled easi-
ly.IGNITION KEY REMINDER
The ignition key reminder alerts the driver that the key is
still in the ignition when the driver attempts to exit the ve-
hicle.
An internal switch in the ignition lock cylinder supplies bat-
tery voltage to the reminder chime module when all of the
following conditions are true:
S The key is in the ignition switch.
S The ignition is OFF.
S The driver’s door is open.
For information on removal and installation of the reminder
chime module, refer to Section 9E, Instrumentation/Driver
Information.

SECTION : 7A
HEATING AND VENTILATION SYSTEM
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
SPECIFICATIONS7A–1 . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater Temperature Specifications 7A–1. . . . . . . . . . .
Fastener Tightening Specifications 7A–1. . . . . . . . . . .
SCHEMATIC AND ROUTING DIAGRAMS7A–3 . . . . .
Non–A/C Diagrams 7A–3. . . . . . . . . . . . . . . . . . . . . . . .
Airflow – Typical 7A–4. . . . . . . . . . . . . . . . . . . . . . . . . . .
Airflow with Rear Heating Duct 7A–5. . . . . . . . . . . . . .
DIAGNOSIS7A–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER SYSTEM 7A–6. . . . . . . . . . . . . . . . . . . . . . . . . .
Insufficient Heating or Defrosting 7A–6. . . . . . . . . . . . .
Blower Electrical 7A–9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Improper Air delivery or No Mode Shift 7A–11. . . . . .
Too Much Heat 7A–13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls 7A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Noise 7A–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . MAINTENANCE AND REPAIR7A–18 . . . . . . . . . . . . . .
ON–VEHICLE SERVICE 7A–18. . . . . . . . . . . . . . . . . . . .
Temperature Cable Adjustment 7A–18. . . . . . . . . . . . .
Temperature Control Cable 7A–18. . . . . . . . . . . . . . . . .
Control Assembly 7A–20. . . . . . . . . . . . . . . . . . . . . . . . .
Control Assembly Knob Lighting 7A–21. . . . . . . . . . . .
Heater/Air Distributor Case Assembly 7A–21. . . . . . .
Blower Motor 7A–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High–Blower Relay 7A–24. . . . . . . . . . . . . . . . . . . . . . . .
Blower Resistor 7A–25. . . . . . . . . . . . . . . . . . . . . . . . . .
Heater Hoses 7A–25. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater Core 7A–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION7A–28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating and Ventilation Systems 7A–28. . . . . . . . . . . .
SPECIFICATIONS
HEATER TEMPERATURE SPECIFICATIONS
Ambient Air TemperatureHeater Outlet Air Temperature
–18°C (0°F)54°C (129°F)
– 4°C (25°F)59°C (138°F)
10°C (50°F)64°C (147°F)
24°C (75°F)68°C (154°F)
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
Blower Motor–to–A/C Assembly Screws1.2–11
Blower Motor Resistor Screws1.2–11
Blower Motor Retaining Screws1.2–11
Controller Retaining Screws2–18
Heater/Air Distributor Case Assembly Screw4–35

7A – 2IHEATING AND VENTILATION SYSTEM
DAEWOO V–121 BL4
Application Lb–InLb–Ft NSm
Heater Core Cover Screws1.2–11
Heater Core Housing–to–Evaporator Housing Screws1.2–11

HEATING AND VENTILATION SYSTEM 7A – 3
DAEWOO V–121 BL4
SCHEMATIC AND ROUTING DIAGRAMS
NON–A/C DIAGRAMS

7A – 4IHEATING AND VENTILATION SYSTEM
DAEWOO V–121 BL4
AIRFLOW – TYPICAL

HEATING AND VENTILATION SYSTEM 7A – 5
DAEWOO V–121 BL4
AIRFLOW WITH REAR HEATING DUCT
(LEFT–HAND DRIVE SHOWN, RIGHT–HAND DRIVE
SIMILAR)

7A – 6IHEATING AND VENTILATION SYSTEM
DAEWOO V–121 BL4
DIAGNOSIS
HEATER SYSTEM
INSUFFICIENT HEATING OR DEFROSTING
CAUTION : The cooling system is pressurized when hot. Injury can result from removing the surge tank cap be-
fore the engine is sufficiently cool.
Step
ActionValue(s)YesNo
1Verify the customer’s complaint.
Are the customer’s concerns verified?–Go to Step 2System OK
2Check the coolant level.
Is the coolant level correct?–Go to Step 4Go to Step 3
3Add coolant as needed.
Is the repair complete?–System OKGo to Step 4
4Check the timing belt for tension or damage.
Are the drive belts OK?–Go to Step 6Go to Step 5
5Correct any problem with the timing belt.
Is the repair complete?–System OKGo to Step 6
6Check the coolant hoses for leaks or kinks.
Are the coolant hoses OK?–Go to Step 8Go to Step 7
7Repair any problem with the coolant hoses.
Is the repair complete?–System OKGo to Step 8
8Check the surge tank cap. Refer to Section 2D, En-
gine Cooling.
Is the surge tank cap OK?–Go to Step 10Go to Step 9
9Repair or replace the surge tank cap as needed.
Is the repair complete?–System OKGo to Step 10
101. Turn the A/C switch OFF on vehicles equipped
with air conditioning (A/C).
2. Set the blower motor switch on maximum
speed.
3. Set the heater control to full hot.
4. Turn the ignition ON.
5. Check for airflow from the vent outlet.
Is there heavy airflow from the heater outlet?–Go to Step 11Go to Step 26
11Check for a change in the airflow at various blower
speeds.
Does the blower speed increase as the switch is
turned from 1 to 4.–Go to Step 12Go to ”Blower
Electrical
(Manual and
Non–A/C)”
121. Turn the A/C switch OFF.
2. Set the temperature lever to full hot.
3. Set the blower motor switch on maximum
speed.
4. With the engine sufficiently cool, remove the
surge tank cap.
5. Start the vehicle and idle the engine.
6. Watch for the flow of the coolant.
Is the coolant flow visible?–Go to Step 14Go to Step 13