unit lower side and at the bottom of its
installation compartment, so that the
defroster unit does not fall at the moment of
assembling the air distribution box, because
the fixing screws simultaneously join both
parts.
32. Install defroster air distribution box.
SPECIFICATION: Tighten the defroster unit
and air distribution box assembly fixing
screws, applying the following torque: 6 N-m.
Use: 88890148 TORQUE WRENCH.

33. Plug defroster electrical harness.

34. Install defroster air distribution duct box.
Note: Tighten firmly the air distribution duct
box fixing screws on the defroster unit.

35. Connect defroster vent hoses.
Note: Tighten firmly the defroster ventilation
hoses clamps and make sure the hoses are
not kinked so the air flow is still good.
Place a new cable ties for fix the defroster
vent hoses as necessary. Use: 949902
CABLE TIE.
36. Install defroster air duct.
Note: Tighten firmly the defroster air duct
fixing screws.

Writer: Ing. RCBV

MI20-84
Page 9 / 17

37. Connect defroster coolant hoses.
Note: Tighten firmly the both hoses clamps.

38. Release defroster coolant hoses.
Note: Check there are not leaks on the
defroster heater connection ports. If
leakages presents; these must be repair
immediately.

39. Fix defroster heater coil bleed valve.
Note: Tighten firmly the bleed valve fixing
screw.

40. Remove the wedge was placed between
defroster unit and at the bottom of its
installation compartment for secure the
defroster unit during air distribution box
installation.

41. Connect defroster A/C system hoses.

42. Install defroster expansion valve lower
connection lock plate.
Note: Tighten firmly the connections lock
plate fixing screw.

Writer: Ing. RCBV

MI20-84
Page 10 / 17

43. Tighten defroster
connections.

A/C

system

hoses

Note: Tighten firmly the A/C system hoses
connection nuts.

44. Close flux valve for driver area heating
circuit.
Note: For maximize the flow through the
defroster heating circuit when purging.

45. Turn ON the vehicle.
46. Start engine and increase the idle to 1500
rpm in order to perform the defroster heating
system bleeding.
47. Turn ON the climate system by turning the
air director knob so that it points up to the deicing position, in this position the heater
valve is fully open which simplifies purging.

48. Bleed defroster heating system.
Note: Place a tray for collect the coolant
drained.

Writer: Ing. RCBV

MI20-84
Page 11 / 17

49. Check the coolant fluid level in the expansion
tank.
Note: Fill up coolant fluid if necessary.
Use: 20358716 COOLANT 50/50 PREMIX,
CHEVRON ELC W/ NITRITE

50. Shut OFF engine.
51. Plug defroster unit electrical harnesses.
Note: Put a new cable ties as required for fix
the defroster electrical harness. Use: 948702
CABLE TIE

52. Open flux valve for driver area heating
circuit.

53. Perform A/C system refrigerant filling. See
service operation: 87001-3 Refrigerant air
conditioning system, fill; published in
IMPACT, as a reference.
Note: Within refrigerant filling procedure,
system vacuuming process must be carried
out.
54. Start the engine and increase the idle to
1500 rpm in order to perform the A/C system
refrigerant filling.
55. Set climate system at 64°F by turning the air
director knob so that it points up to the driver
position. Also; turning the temperature set
knob, in this position the evaporator valve is
fully open which simplifies the performing the
A/C system refrigerant filling.

Writer: Ing. RCBV

MI20-84
Page 12 / 17

56. Check defroster A/C system refrigerant
leakages.
Note: IF you detect any leaks of refrigerant
at the defroster expansion valve you must
repair immediately.
Use: 88800486 REFRIGERANT
LEAKS DETECTOR

GAS

57. Check defroster proper operation.
Check the defroster cooling proper operation
on driver area.
For check the defroster heating proper
operation, perform the following steps:
— Turn ON the climate system by turning the
air director knob so that it points up to the deicing position (in this position the heater
valve is fully open).
— Check the defroster heating proper
operation.
— Also check that heat is available in all
circuits of the passenger’s compartment.
58. Turn OFF climate system.
59. Shut down engine.
60. Turn OFF the vehicle.
61. Install defroster front plate.

62. Close front hatch.

Writer: Ing. RCBV

MI20-84
Page 13 / 17

63. Close engine compartment.

64. Install guide panel.
Note: Tighten firmly the guide panel fixing
screws.

65. Install guide panel molding.
Note: For molding install, sliding down it to
pin molding on its fixations.

66. Install fire extinguisher.

67. Install dashboard upper cover by screw its 8
fixing screws placed around at the cover
contour.
Note: Tighten firmly upper cover fixing
screws.

Writer: Ing. RCBV

MI20-84
Page 14 / 17

68. Install the windshield, according service
operation: 84302-2 Windscreen, replace.
Published in IMPACT.
Note: Replace windshield sealing molding by
a new.
Use:
P/N:
21133962
SEALING MOLDING.

WINDSHIELD

69. Install wipers arms.
Note: See service operation: 36384-2
Windshield Wiper Arm, Replacement,
published in IMPACT as a reference.
For correct install position, it must exist a
distance of: 102 +/-13 mm (A), between the
windshield pillar center and the wiper blade
center, (this is for both wiper arms).
Tighten wiper arms fixing nuts applying: 35
to 45 N-m. Use torque wrench 88890148.

PARTS / WASTE DISPOSAL
Discard according to applicable environmental regulations (Municipal/State[Prov.]/ Federal)

Writer: Ing. RCBV

MI20-84
Page 15 / 17

ANNEX
Assembly drawings, other instructions.
22314124 Frame front section DOT drawing

22314124 USCAN
FrontSectionFrame.p

Welding application caution:
IMPORTANT!
The welding cords applied to reinforcement profile must be placed in an interrupted way to avoid
overheating of base plate where the reinforcement angle profile will be installed. Should be
remembered that overheating of parts in direct contact with the weld could damage parts
materials of the dashboard.
To avoid possible damage to these parts, place a cloth moistened with water at affected area
during all welding process over dashboard plate surface in order to cool heating of these parts.

Writer: Ing. RCBV

MI20-84
Page 16 / 17

21242039 Front panel assembly drawing

21242039 USCAN
FrontPanelAssy.pdf

Writer: Ing. RCBV

MI20-84
Page 17 / 17

C-frame press tools placing
•

•

Get a square profile (as auxiliary material) of
following dimensions:


(A) Width of 10 mm, maximum.



(B) Large of: 600 mm, minimum.

Place auxiliary profile over dashboard frame
plate and beside of the welded plate (which is
support for windshield center pillar) in a way so
that the profile lock with the plate.
Notice that the auxiliary profile is distributed
symmetrically.

•

Place C-Frame pressing tools so that rests
along the auxiliary profile and the clamps rests
on the front panel surface at the indicated
points, to make pressure that allow adhesion
between the interior front panel surface and the
welded reinforcement.
Use a C-Frame press tools of 6 to 8 inches of
large.

Writer: Ing. RCBV