heater CHEVROLET DYNASTY 1993 User Guide

CLEANING
Drain cooling system (see: Draining Cooling Sys-
tem ) and refill with clean water (see: Refilling
Cooling System ). Run engine with radiator cap in-
stalled until upper radiator hose is hot. Stop engine
and drain water from system. If water is dirty, fill,
run and drain system again until water runs clear.
REVERSE FLUSHING
Reverse flushing of the cooling system is the forc-
ing of water through the cooling system, using air
pressure in a direction opposite to that of the normal
flow of water. This is only necessary with dirty sys-
tems and evidence of partial plugging.
RADIATOR Drain cooling system and remove radiator hoses
from engine. Install suitable flushing gun in radiator
lower hose. Fill radiator with clean water and turn
on air in short blasts. CAUTION: Internal radiator pressure must not ex-
ceed 138 kPa (20 psi) as damage to radiator may re-
sult. Continue this procedure until water runs clear.
ENGINE
Drain radiator (see: Draining Cooling System )
and remove hoses from radiator. Remove engine
thermostat and reinstall thermostat housing. Install
suitable flushing gun to thermostat housing hose.
Turn on water, and when engine is filled, turn on
air, but no higher than 138 kPa (20 psi) in short
blasts. Allow engine to fill between blasts of air.
Continue this procedure until water runs clean. In-
stall thermostat using a new housing gasket. Fill
cooling system (See Refilling Cooling System ).
CHEMICAL CLEANING
One type of corrosion encountered with aluminum
cylinder heads is aluminum hydroxide deposits. Cor-
rosion products are carried to the radiator and depos-
ited when cooled off. They appear as dark grey when
wet and white when dry. This corrosion can be re-
moved with a two part cleaner (oxalic acid and neu-
tralizer) available in auto parts outlets. Follow
manufacturers directions for use.
REFILLING
First clean system to remove old glycol, see Cooling
System Cleaning. Fill system using antifreeze described in Coolant
section. Fill 50 percent of capacity with 100 percent
glycol. Then complete filling system with water. The
2.2/2.5L engines require venting by removal of the
plug on top of the water box (Fig. 1). Turbo III en-
gines require venting by removing the coolant tem-
perature sensor on top of the thermostat housing
(Fig. 2). The 3.3/3.8L Engines require removal of the
Engine Temperature Sending Unit on the front of
the cylinder head (Fig. 3). The thermostat in these
engines do not allow air flow through them. When
coolant reaches the vent holes;
² Install vent plug and tighten to 20 N Im (15 ft. lbs.)
for 2.2/2.5L Engines.
² Install Coolant Temperature Sensor and tighten to
27 N Im (20 ft. lbs.) for Turbo III Engine.
² Install Engine Temperature Sending Unit and
tighten to 7 N Im (60 in. lbs.) for 3.3/3.8L Engines.
Continue filling system until full, this provides bet-
ter heater performance. Be careful not to spill
coolant on drive belts or the generator. Fill coolant reserve system to at least the MAX
mark with 50/50 solution. It may be necessary to add
coolant to the reserve tank to maintain coolant level
between the MAX and MIN mark after three or four
warm-up, cool down cycles and trapped air has been
removed.
Fig. 2 Coolant Temperature SensorÐTurbo III Drain/Fill
Fig. 3 Engine Temperature Sending UnitÐ3.3L and 3.8L Drain/Fill
7 - 16 COOLING SYSTEM Ä

TESTING SYSTEM FOR LEAKS
With engine not running, wipe the radiator filler
neck sealing seat clean. The radiator should be full. Attach a radiator pressure tester to the radiator, as
shown in (Fig. 4) and apply 104 kPa (15 psi) pres-
sure. If the pressure drops more than 2 psi in 2 min-
utes inspect all points for external leaks. All hoses, radiator and heater, should be moved
while at 15 psi since some leaks occur while driving
due to engine rock, etc.
If there are no external leaks after the gauge dial
shows a drop in pressure, detach the tester. Start en-
gine and run the engine to normal operating temper-
ature in order to open the thermostat and allow the
coolant to expand. Re-attach the tester. If the needle
on the dial fluctuates it indicates a combustion leak,
usually a head gasket leak.
WARNING: WITH TOOL IN PLACE PRESSURE
BUILDS UP FAST. ANY EXCESSIVE AMOUNT OF
PRESSURE BUILT UP BY CONTINUOUS ENGINE
OPERATION MUST BE RELEASED TO A SAFE
PRESSURE POINT. NEVER PERMIT PRESSURE TO
EXCEED 138 KPA (20 PSI).
If the needle on the dial does not fluctuate, race
the engine a few times. If an abnormal amount of
coolant or steam is emitted from the tail pipe, it may
indicate a faulty head gasket, cracked engine block
or cylinder head. There may be internal leaks which can be deter-
mined by removing the oil dip-stick. If water glob-
ules appear intermixed with the oil it will indicate a internal leak in the engine. If there is an internal
leak, the engine must be disassembled for repair.
COOLANT RECOVERY SYSTEM (CRS)
This system works in conjunction with the radiator
pressure cap to utilize thermal expansion and con-
traction of the coolant to keep the coolant free of
trapped air. It provides a volume for expansion and
contraction, provides a convenient and safe method
for checking coolant level and adjusting level at at-
mospheric pressure without removing the radiator
pressure cap. It also provides some reserve coolant to
cover minor leaks and evaporation or boiling losses.
All vehicles are equipped with this system (Figs. 5
and 6).
See Coolant Level Check Service, Deaeration and
Pressure Cap sections for operation and service. Ve-
hicles equipped with the electric monitor system use
a level sensor in the CRS tank, see Group 8E Elec-
trical for service.
Fig. 4 Pressure Testing Cooling System
Fig. 5 Coolant Recovery System Typical
Fig. 6 Coolant Recovery SystemÐAC-AY Models
Ä COOLING SYSTEM 7 - 17

(2) Remove radiator pressure cap when engine is
cold, Idle engine until thermostat opens, you should
observe coolant flow while looking down the filler
neck. Once flow is detected install radiator pressure
cap.
RADIATOR
REMOVAL
(1) Disconnect negative battery cable from battery.
WARNING: DO NOT REMOVE THE CYLINDER
BLOCK PLUG OR THE RADIATOR DRAINCOCK
WITH THE SYSTEM HOT AND UNDER PRESSURE
BECAUSE SERIOUS BURNS FROM COOLANT CAN
OCCUR.
(2) Drain cooling system. Refer to Draining Cool-
ing System of this section. (3) Remove hose clamps and hoses from the radia-
tor (Fig. 11). Remove coolant reserve system tank to
filler neck tube. (4) Remove automatic transmission hoses, if
equipped. (5) Remove fan and fan support assembly by dis-
connecting fan motor electrical connector. Remove
fan shroud retaining clips, located on the top and
bottom of the shroud for AA, AG, AJ and AP vehi-
cles. AC/AY vehicle retainer clips are located on the
top only. Lift shroud up and out of bottom shroud at-
tachment clips separating shroud from radiator. Fan
damage should always be avoided. (6) Remove upper radiator mounting screws. Dis-
connect the engine block heater wire if equipped. (7) Remove the air conditioning condenser attaching
screws located at the top front of the radiator,if
equipped. Radiator can now be lifted free from engine compart-
ment. Care should be taken not to damage radia-
tor cooling fins or water tubes during removal.
INSTALLATION
(1) Slide radiator down into position behind radiator
support (yoke). (2) Attach air conditioning condenser to radiator, if
equipped, with a force of approximately 10 lbs. to seat
the radiator assembly lower rubber isolators in the
mount holes provided. (3) Tighten radiator mounting screws to 11.9N Im
(105 in. lbs.). (4) Connect automatic transmission hoses, if
equipped. Tighten hose clamps to 4 N Im (35 in. lbs.).
(5) Slide fan shroud, fan and motor down into clips
on lower radiator flange. Replace shroud retaining
clips. (6) Install upper and lower radiator hoses (including
coolant reserve hose). (7) Connect fan motor electrical connection and con-
nect negative battery cable. (8) Fill cooling system with coolant. Refer to Refill-
ing Cooling Systems. in this group.
(9) Operate engine until it reaches normal operating
temperature. Check cooling system and automatic
transmission for correct fluid levels.
Fig. 11 Cooling ModulesÐAll Models
7 - 20 COOLING SYSTEM Ä

ENGINE BLOCK HEATER
DESCRIPTION AND OPERATION
On all models an engine block heater is available as
an optional accessory. The heater, operated by ordinary
house current (110 Volt A.C.) through a power cord and
connector behind the radiator grille, provides easier
engine starting and faster warm-up when vehicle is
operated in areas having extremely low temperatures.
The heater is mounted in a core hole (in place of a core
hole plug) in the engine block, with the heating ele-
ment immersed in coolant (Fig. 9). The power cord must be secured in its retainer
clips, and not positioned so it could contact link-
ages or exhaust manifolds and become damaged. If unit does not operate, trouble can be in either the
power cord or the heater element. Test power cord for
continuity with a 110-volt voltmeter or 110-volt test
light; test heater element continuity with an ohmmeter
or 12-volt test light.
REMOVAL
(1) Drain coolant from radiator and cylinder block.
Refer to Cooling System Drain, Clean, Flush and Re-
fill of this section for procedure. (2) Detach power cord plug from heater.
(3) Loosen screw in center of heater. Remove
heater assembly.
INSTALLATION
(1) Thoroughly clean core hole and heater seat.
(2) Insert heater assembly with element loop posi-
tioned upward.
(3) With heater seated, tighten center screw se-
curely to assure a positive seal. (4) Fill cooling system with coolant to the proper
level, vent air, and inspect for leaks. Pressurize sys-
tem with Radiator Pressure Tool before looking for
leaks.
Fig. 9 Engine Block Heater
7 - 28 COOLING SYSTEM Ä

(4) Remove panel top cover by pushing forward
and prying up, using a straight edge to assist in the
removal. (5) Disconnect bulkhead connector at brace under
instrument panel at left side. (6) Remove glovebox/ash receiver module and right
instrument panel silencer. (7) Remove center panel support brace and air bag
diagnostic module assembly. (8) Disconnect wiring to airbag module.
(9) Remove upper and lower cluster bezels.
(10) Remove steering column cover.
(11) Remove steering column mounting nuts and
lower steering column. (12) Unhook shift indicator cable eyelet from steer-
ing column actuator. (13) Unlatch lock tab in shift indicator column in-
sert and squeeze legs together to remove from steer-
ing column. (14) Remove cluster assembly while guiding trans-
mission range indicator guide tube through access
hole in the base panel. (15) Remove instrument panel steering column
opening support/hood release handle assembly. (16) Remove two steering column upper studs and
loosen side cowl tie-down bolts. (17) Remove steering column tilt lever.
(18) Remove upper and lower lock housing shroud.
(19) Remove lower fixed shroud.
(20) Remove upper fixed shroud (snaps in place).
(21) Disconnect airbag pigtail, ignition switch and
halo light/key buzzer switch wiring. (22) Disconnect Multi-function switch by loosening
connector jack screw and pulling connector from
switch. (23) Disconnect airbag pigtail from wiring trough
housing by pulling two push fasteners. (24) Remove wiring trough from steering column.
(25) Remove defroster ducts.
(26) Remove five screws along fence line and roll
panel down, attach a hook to hold in position. (27) Open hood and remove plenum grill.
(28) Disconnect washer bottle, resistor block and
under hood lamp wiring. Washer bottle must be re-
moved to gain access. (29) Remove grommet and pull plenum wiring into
vehicle through plenum panel. (30) Disconnect right demister hose from instru-
ment panel. (31) Disconnect antenna cable.
(32) Disconnect right and left 25 way body wiring
connectors. (33) Disconnect A/C heater control cables, wiring
connectors and vacuum harness. (34) Remove right side panel ground wire.
(35) Disconnect body controller wiring.
(36) Remove instrument panel assembly from vehi-
cle. (37) For installation reverse above procedures.
INTERIOR LAMP REPLACEMENT
The reading, overhead console and door lamps op-
erate when the doors are open or headlamp switch is
placed in courtesy position. Front overhead lamps re-
fer to Group 8C, Overhead Console.
TRUNK LAMP
The lamp has easily accessible without removing
components.
DOOR LAMP
Pry along the forward edge of the lens and pivot
lens out of the door trim panel. Remove lamp. To re-
move lamp housing, remove door trim panel. Refer to
Group 23, Body. Disconnect all wiring. Remove
screws, if so equipped securing lamp housing to trim
panel, and replace housing.
CÐPILLAR READING/COURTESY LAMP
Pry along the rearward edge of the lamp and pivot
lamp out from quarter trim panel. Disconnect wiring
and remove lamp cover. Replace lamp. The lamp operates when the doors are open or the
headlamp switch is turned to the courtesy mode. The
lamp will function as a reading lamp when the doors
are closed and the button switch on the lamp is de-
pressed.
ROOF RAIL READING
Pry along the bottom edge of the lens and pivot
lens out. Replace lamp. To remove the lamp, remove
the screw which retains the coat hook. Remove the
garnish molding. Disconnect the wiring harness. Re-
move the two clips which retain the lamp to the
molding. Replace lamp. The lamp operates like the
C-pillar reading/courtesy lamp.
Ä INSTRUMENT PANEL AND GAUGES 8E - 41

(11) Remove two screws from fuse block and lower
fuse block. (12) Remove three screws from hood release and
lower hood release handle. (13) Remove flasher relay from bracket on center
distribution duct. (14) Remove screw from ATC sensor motor assem-
bly and unhook from bracket if equipped. (15) Remove the radio ground screw above flasher
relay mount. (16) Remove center distribution duct screw from
left instrument panel lower brace, then remove four
screws to remove left lower brace.
(17) Remove five nuts on steering column and drop
column, then remove two upper column attaching studs.
(18) Remove two screws and pull out compact disc
player or cubby box, disconnect Co-Axial cable from
compact disc player. (19) Remove Electronic Vehicle Information Center
(E.V.I.C.) or Traveler from vehicle. (20) Remove radio.
(21) Remove A.T.C., A/C or heater controls. (22) Squeeze latches on side of Rear Window defog-
ger switch and remove. (23) Snap off cluster lower trim bezel, switch pod
vent grille, speaker grilles and defroster grilles. (24) Remove switch pod assembly.
(25) Remove cluster assembly.
(26) Remove dash speakers.
(27) Snap out bezel with or without message center
and disconnect wiring. (28) Open glovebox door, squeeze sides and roll
glovebox completely open. Remove glovebox light
switch, and disconnect wires. (29) Loosen right cowl side pivot bolt through
glovebox opening then close glovebox. (30) Loosen left cowl side pivot.
(31) Remove four screw attachments at top of in-
strument panel and roll panel out. (32) Pull wiring, antenna cable, A/C cable and vac-
uum lines out of instrument panel. Disconnect demis-
ter hose and remove instrument panel with ducts
attached. (33) Transfer ducts and brackets onto new panel.
(34) For instrument panel roll up, reverse
above procedures.
INTERIOR LAMP REMOVAL
The Dome, Floor Console and Door Lamps operate
when the doors are open or headlamp switch is
placed in courtesy position.
DOME LAMP
(1) Pry either the forward or rearward edge of the
dome lamp to free it from retaining bracket. (2) Pry either the forward or rearward edge of the
lens away from the bezel and replace lamp. (3) For installation reverse above procedures.
FRONT HEADER READING LAMP
Pull lamp from headliner. Disconnect wiring and
replace lamp.
FLOOR CONSOLE LAMP
Pry along top edge of lamp and pivot lamp out of
floor console, the lens does not remove. Remove lamp
and twist out lamp socket. Replace lamp.
DOOR LAMPS
Pry along bottom edge of lamp and pivot lamp out
of door trim panel, the lens does not remove. Remove
lamp and twist out lamp socket. Replace lamp.
DOOR REFLECTORS
Pry reflector away from the door trim panel, and
replace.
TRUNK LAMP
Remove lens by prying lens out of trunk trim panel
and replace bulb.
Fig. 33 Transmission Range Cable
Fig. 34 Cable Adjustment
Ä INSTRUMENT PANEL AND GAUGES 8E - 57

HEADLAMP SWITCH REPLACEMENT
(1) Snap headlamp switch bezel out of instrument
panel pad (Fig. 21). (2) Remove three screws securing headlamp switch
mounting plate to instrument panel. (3) Pull headlamp switch and mounting plate rear-
ward from instrument panel opening. (4) Disconnect wiring connector from switch.
(5) Remove switch knob by depressing release but-
ton on the bottom on the switch and pulling knob out
from switch. (6) Snap headlamp switch escutcheon out of
mounting plate to gain access to mounting plate re-
taining nut. (7) Remove headlamp switch to mounting plate re-
taining nut and separate switch from mounting
plate. (8) For installation reverse above procedures.
A/C HEATER CONTROL REPLACEMENT
(1) Remove center bezel assembly.
(2) Remove A/C control to instrument panel retain-
ing screws (Fig. 22). (3) Pull control rearward and disconnect tempera-
ture control cable and electrical and vacuum connec-
tors. (4) Remove control from vehicle.
(5) For installation reverse above procedures.
Fig. 20 Lower Instrument Panel
Fig. 21 Headlamp Switch Assembly
8E - 68 INSTRUMENT PANEL AND GAUGES Ä

HEATER CONTROL LAMP REPLACEMENT
(1) Remove heater control. Refer to A/C Heater
Control for removal. (2) Pull control far enough to gain access to the
lamp socket. (3) Replace lamp. To remove lamp rotate socket
counter clockwise. To install rotate clockwise. (4) For installation reverse above procedures.
A/C CONTROL LAMP REPLACEMENT
(1) Remove heater control. Refer to A/C Heater
Control for removal. (2) Pry temperature and blower switch knobs off
with flat blade tool. To protect cosmetic face place
cardboard or similar material on the face plate while
prying. (3) Remove face plate by lifting on the six tabs.
Three on top and three on bottom of the face plate. (4) Replace lamp.
(5) For installation reverse above procedures.
HEATER CONTROL BLOWER SWITCHREPLACEMENT
(1) Remove heater control. Refer to A/C Heater
Control for removal. (2) Pry temperature and blower switch knobs off
with flat blade tool. To protect cosmetic face place
cardboard or similar material on the face plate while
prying. (3) Remove face plate by lifting on the six tabs.
Three on top and three on bottom of the face plate. (4) Pry blower switch off with flat blade tool. To
protect cosmetic face, place cardboard or similar ma-
terial on the face plate while prying. (5) To replace, line up blower switch terminals and
press firmly until the it bottoms out on the housing. (6) For installation reverse above procedures.
A/C CONTROL BLOWER SWITCHREPLACEMENT
(1) Remove heater control. Refer to A/C Heater
Control for removal. (2) Position the temperature knob at the maximum
heat position to gain screw access. (3) Remove two screws holding the blower switch
located on top of the control. (4) Pry the blower switch off with a flat blade tool.
(5) To replace, line up blower switch terminals and
press firmly until the it bottoms out on the housing. (6) For installation reverse above procedures.
GLOVE BOX MODULE REPLACEMENT
(1) Disconnect battery negative cable and isolate
or remove fuse #13 prior to removing switch or wires
may short to ground. (2) Open glove box door (Fig. 23).
(3) Remove check strap screws to allow full down-
ward movement of the glove box door. (4) Remove six screws attaching glove box module
to instrument panel. (5) Pull glove box module rearward and disconnect
wiring from lamp and switch. (6) Remove glove box from vehicle.
(7) For installation reverse above procedures.
When installing glove box module, be sure that left
edge of module is pressed against foam bead on trim
pad. This will assure that there will be an adequate
gap between right edge of glove box door and trim
pad.
ASH RECEIVER ASSEMBLY REPLACEMENT
(1) Open ash receiver and remove center module
bezel. (2) Remove ash receiver bracket to instrument
panel retaining screws (Fig. 23). (3) Pull assembly rearward off of locating pins and
disconnect wiring for lamp. (4) Remove ash receiver from vehicle.
(5) For installation reverse above procedures.
Fig. 22 A/C Heater Control
Fig. 23 Glove Box, Ash Receiver and Cigar Lighter
Ä INSTRUMENT PANEL AND GAUGES 8E - 69

AA .............................................................................74
Low Fuel
AA ...........................................................................103
AP ............................................................................161
AC, AY...............................................................PC194
AG, AJ ............................................................5269245
Low Washer Fluid
AA, AC, AY .............................................................74
AP ............................................................................161
AG, AJ ............................................................4437661
Oil Pressure
All .......................................................................PC194
Trunk Open
AA, AC, AY .............................................................74
AP ............................................................................161
AG, AJ ............................................................4437661
Theft Alarm Set
AC, AY....................................................................168
AG, AJ ............................................................4437661
Turn Signal (MIC)
AA ...........................................................................103
AC, AG, AJ, AP, AY .......................................PC194
Turn Signal (EIC)
AA, AY ..............................................................PC194
Seat Belt (MIC)
AA ...........................................................................103
AC, AG, AJ, AP, AY .......................................PC194
Seat Belt (EIC)
AA, AY ..............................................................PC194
AJ ............................................................................103
DIMMER CONTROLLED LAMPS
Service procedures for most of the lamps in the in-
strument panel, Instrument cluster and switches are
located in Group 8E, Instrument Panel and Gauges. A/C Heater Control
All ..............................................................................37
Automatic Temperature Control
All ....................................................................4437661
Column Gearshift Indicator
AA, AC, AY ...........................................................161
Console Gearshift Indicator
AP ............................................................................194
AA, AG, AJ ............................................................161
Fog Lamp Switch Symbol
AG ......................................................................PC194
Headlamp Dimmer Switch
AG, AJ ......................................................................37
Headlamp Switch Symbol
AC, AY....................................................................161
AG, AJ ......................................................................37
Heater Control
All ............................................................................158
EVIC
AJ...........................................................................ASC
Instrument Cluster (MIC)
All .......................................................................PC194
Instrument Cluster (EIC) AA, AY .....................................................................74
Message Center
AA, AC, AY .............................................................74
AP ............................................................................161
Navigator/Travel Companion
AA, AJ ......................................................................74
Radio
All ..........................................................................ASC
Rear Defogger Switch
Not Serviceable, Replace Switch
Rear Wiper Switch
AG .............................................................................37
Theft Alarm
AC, AY....................................................................161
Top Lift Switch
AJ ....................................................................5268053
Travel Computer
All ..........................................................................ASC
Turbo Gauge
AP ............................................................................161
Windshield Wiper Switch
AG, AJ ......................................................................37
NON-DIMMING LAMPS
Service procedures for most of the lamps in the fol-
lowing list can be found in Group 23, Body. Some
components have lamps that can only be serviced by
a Authorized Service Center (ASC) after the compo-
nent is removed from the vehicle. Contact local
dealer for location of nearest ASC. Ash Receiver
AA .............................................................................74
AC, AP, AY ............................................................161
AG, AJ ......................................................................37
Center Console Rear
AJ ............................................................................906
Cigar Lighter
AA, AP ....................................................................161
Courtesy
AA, AC, AY-S .....................................................214-2
AJ ............................................................................906
AY-P.....................................................................212-2
Dome
ALL ......................................................................211-2
Engine Compartment
All ............................................................................105
Glove Compartment
All ..........................................................................1891
Ignition Lock
All ..............................................................................37
Inside Rear View Mirror
AJ ............................................................................168
Overhead Console
AA ...........................................................................912
AC, AY....................................................................906
AG, AJ, AP .........................................................212-2
Reading Lamp Front
All ............................................................................906
Ä LAMPS 8L - 39

FRONT IMPACT SENSORS
The driver air bag system is a safety device de-
signed to reduce the risk of fatality or serious injury,
caused by a frontal impact of the vehicle. The impact sensors provide verification of the di-
rection and severity of the impact. Three impact sen-
sors are used. One is called a safing sensor. It is
located inside the diagnostic module which is
mounted on the floor pan, just forward of the center
console. The other two sensors are mounted on the
upper crossmember of the radiator closure panel on
the left and right side of the vehicle under the hood. The impact sensors are threshold sensitive switches
that complete an electrical circuit when an impact
provides a sufficient G force to close the switch. The
sensors are calibrated for the specific vehicle and re-
act to the severity and direction of the impact.
CLOCKSPRING
The clockspring is mounted on the steering column
behind the steering wheel, and is used to maintain a
continuous electrical circuit between the wiring har-
ness and the driver's air bag module. This assembly
consists of a flat ribbon-like electrically conductive
tape which winds and unwinds with the steering
wheel rotation.
DIAGNOSTIC MODULE
The Air Bag System Diagnostic Module (ASDM)
contains the safing sensor and energy reserve capac-
itor. The ASDM monitors the system to determine
the system readiness. The ASDM will store sufficient
energy to deploy the air bag for only two minutes af-
ter the battery is disconnected. If both front impact
sensors are open the air bag could be deployed up to
9.5 minutes after the battery is disconnected. The
ASDM contains on-board diagnostics, and will illumi-
nate the AIR BAG warning lamp in the cluster when
a fault occurs.
STORAGE
The air bag module must be stored in its original
special container until used for service. Additionally,
it must be stored in a clean, dry environment, away
from sources of extreme heat, sparks, and sources of
high electrical energy. Always place or store the
module on a surface with the trim cover facing up to
minimize movement in case of accidental deploy-
ment.
HANDLING LIVE MODULE
At no time should any source of electricity be per-
mitted near the inflator on the back of the module.
When carrying a live module, the trim cover should
be pointed away from the body to minimize injury in
the event of accidental deployment. In addition, if
the module is placed on a bench or other surface, the plastic trim cover should be face up to minimize
movement in case of accidental deployment. When handling a steering column with an air bag
module attached, never place the column on the floor
or other surface with the steering wheel or module
face down.
DEPLOYED MODULE
The vehicle interior may contain a very small
amount of sodium hydroxide powder, a byproduct of
air bag deployment. Since this powder can irritate
the skin, eyes, nose or throat, be sure to wear safety
glasses, rubber gloves and long sleeves during
cleanup (Fig. 2).
If you find that the cleanup is irritating your skin,
run cool water over the affected area. Also, if you ex-
perience nasal or throat irritation, exit the vehicle
for fresh air until the irritation ceases. If irritation
continues, see a physician.
CLEANUP PROCEDURE
Begin the cleanup by putting tape over the two air
bag exhaust vents (Fig. 3) so that no additional pow-
der will find its way into the vehicle interior. Then
remove the air bag and air bag module from the ve-
hicle. Use a vacuum cleaner to remove any residual pow-
der from the vehicle interior. Work from the outside
in so that you avoid kneeling or sitting in a un-
cleaned area. Be sure to vacuum the heater and A/C outlets as
well (Fig. 4). In fact it's a good idea to run the blower
on low and to vacuum up any powder expelled from
the plenum. You may need to vacuum the interior of
the car a second time to recover all of the powder. Place the deployed bag and module in your auto-
motive scrap.
Fig. 2 Wear Safety Glasses and Rubber Gloves
8M - 2 RESTRAINT SYSTEMS Ä