sensor Mercury Sable 1998 Owner's Manuals

How does the air bag supplemental restraint
system work?
The air bag SRS is
designed to activate
when the vehicle
sustains sufficient
longitudinal
deceleration sufficient
to cause the sensors to
close an electrical
circuit that initiates air
bag inflation.
The fact that the air bags did not inflate in a
collision does not mean that something is wrong
with the system. Rather, it means the forces were
not of the type sufficient to cause activation. Air
bags are designed to inflate in frontal and
near-frontal collisions, not rollover, side-impact, or
rear-impacts.
The air bags inflate and
deflate rapidly upon
activation. After air bag
deployment, it is
normal to notice a
smoke-like, powdery
residue or smell the
burnt propellant. This
may consist of
cornstarch, talcum
powder (to lubricate
the bag) or sodium
compounds (e.g., baking soda) that result from the
combustion process that inflates the air bag. Small
amounts of sodium hydroxide may be present which
may irritate the skin and eyes, but none of the
residue is toxic.
While the system is designed to help reduce serious
injuries, it may also cause minor burns, abrasions,
Seating and safety restraints
70

swelling or temporary hearing loss. Because air bags
must inflate rapidly and with considerable force,
there is the risk of death or serious injuries such as
fractures, facial and eye injuries or internal injuries,
particularly to occupants who are not properly
restrained or are otherwise out of position at the
time of air bag deployment. Thus, it is extremely
important that occupants be properly restrained as
far away from the air bag module as possible while
maintaining vehicle control.
Several air bag system components get hot
after inflation. Do not touch them after
inflation.
If the air bag is inflated,the air bag will
not function again and must be replaced
immediately.If the air bag is not replaced, the
unrepaired area will increase the risk of injury in a
collision.
The SRS consists of:
²driver and passenger air bag modules (which
include the inflators and air bags),
²one or more impact and safing sensors,
²a readiness light and tone
²and the electrical wiring which connects the
components.
The diagnostic module monitors its own internal
circuits and the supplemental air bag electrical
system warning (including the impact sensors), the
system wiring, the air bag system readiness light, the
air bag back up power and the air bag ignitors.
Seating and safety restraints
71

Fuse/
Relay
LocationFuse
Amp
RatingDescription
7 40A** Rear Window Defrost Relay
8 30A** Thermactor Air ByPass
Solenoid, EAM Solid State
Relay
9 40A** High Speed Cooling Fan Relay,
Low Speed Cooling Fan Relay
10 20A** Fuel Pump Relay
11 40A** Blower Motor Relay
12 Ð Not Used
13 40A** Anti-Lock Brake Module
14 Ð Not Used
15 15A* Daytime Running Lamps
(DRL) Module
16 10A* Air Bag Diagnostic Monitor
17 20A* Rear Control Unit, CD Changer
18 30A* Anti-Lock Brake Module
19 15A* Horn Relay, Powertrain Control
Module (PCM)
20 15A* Headlamp Switch, Autolamp
Park Relay
21 Ð Not Used
22 30A* Autolamps Relay,
Multi-Function Switch,
Headlamp Switch
23 Ð Blower Motor Relay
24 Ð Starter Relay
25 Ð A/C Clutch Relay
26 30A* Generator/Voltage Regulator
27 10A* A/C Clutch Relay
28 15A* Heated Oxygen Sensors,
Canister Vent
29 Ð Fuel Pump Relay
Roadside emergencies
114