2004 DAEWOO LACETTI Service Repair Manual

Page 1977 of 2643

DAEWOO LACETTI 2004  Service Repair Manual HEATING AND VENTILATION SYSTEM  7A – 3
DAEWOO V–121 BL4
SCHEMATIC AND ROUTING DIAGRAMS
NON–A/C DIAGRAMS

Page 1978 of 2643

DAEWOO LACETTI 2004  Service Repair Manual 7A – 4IHEATING AND VENTILATION SYSTEM
DAEWOO V–121 BL4
AIRFLOW – TYPICAL

Page 1979 of 2643

DAEWOO LACETTI 2004  Service Repair Manual HEATING AND VENTILATION SYSTEM  7A – 5
DAEWOO V–121 BL4
AIRFLOW WITH REAR HEATING DUCT
(LEFT–HAND DRIVE SHOWN, RIGHT–HAND DRIVE
SIMILAR)

Page 1980 of 2643

DAEWOO LACETTI 2004  Service Repair Manual 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 remov

Page 1981 of 2643

DAEWOO LACETTI 2004  Service Repair Manual HEATING AND VENTILATION SYSTEM  7A – 7
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
131.  Check for the following problems:
S  Restriction in the cooling system.
S  Failed water pump impeller.
S Fa

Page 1982 of 2643

DAEWOO LACETTI 2004  Service Repair Manual 7A – 8IHEATING AND VENTILATION SYSTEM
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
20Replace the thermostat. Refer to Section 2D, En-
gine Cooling.
Is the repair complete?–System OK–
21Reinstal

Page 1983 of 2643

DAEWOO LACETTI 2004  Service Repair Manual HEATING AND VENTILATION SYSTEM  7A – 9
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
341.  Set the blower on maximum speed.
2.  Rotate the temperature control from full hot to
full cold.
3.  Listen

Page 1984 of 2643

DAEWOO LACETTI 2004  Service Repair Manual 7A – 10IHEATING AND VENTILATION SYSTEM
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
71.  Turn the ignition ON.
2.  Set the blower switch on 4.
3.  Check the blower motor ground.
Is ground OK?–Go