2001 Mercury Mountaineer sensor

The reverse sensing system is
automatically enabled when the gear
selector is placed in R (Reverse)
and the ignition is ON. A reverse
sensing control allows the driver to
disable the reverse sensing system
only when the ignition is ON, and
the gear selector is in R (Reverse).
The OFF indicator remains illuminated when the system is disabled. The
system defaults to ON every time the reverse gear is selected. Press the
control to disable or enable the system.
The indicator will remain illuminated to indicate a failure of the reverse
sensing system.
Always keep the sensors (located on the rear bumper/fascia) free
from dirt, snow and ice (do not clean the sensors with sharp
objects). These elements may cause the system to operate
inaccurately.
If the vehicle sustains damage to the rear bumper/fascia, leaving
it misaligned or bent, the sensing zone may be altered causing
inaccurate measurement of obstacles or false alarms.OFF
Controls and features
35

recommends that all safety belt assemblies used in vehicles involved in a
collision be replaced. However, if the collision was minor and a qualified
technician finds that the belts do not show damage and continue to
operate properly, they do not need to be replaced. Safety belt assemblies
not in use during a collision should also be inspected and replaced if
either damage or improper operation is noted.
Failure to inspect and if necessary replace the safety belt
assembly under the above conditions could result in severe
personal injuries in the event of a collision.
Refer toCleaning and maintaining the safety beltsin the
Maintenance and caresection.
AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Your vehicle is equipped with a crash sensing and diagnostic module
which records information about the air bag and sensor systems. In the
event of a collision this module may save information related to the
collision including information about the air bag system and impact
severity. This information will assist Ford in the servicing of your vehicle
and may help Ford better understand real world collisions and further
improve the safety of future vehicles.
012345
6H
C
F
E
OFF
OFF
REW
1FF
2SIDE 1-2
3
FM 1VOL – PUSH ON
AM
FMBASS TREBBAL FADE
AUTO
SET CLK
SEEKTUNE
DISCSSCAN4DOLBY SYSTEMEJTAPE CDCOMP5SHUFFLE
6
PUSH
20
1030405060
70
80
90
110
200000000oooo10020406080100
120
140
160
180UNLEADED
FUEL ONLYOD
ON/OFFHHL
OFF ONR. WIPE
• A/C
• MAX
A/C
RSM
SET
ACC
COAST OFF ON
SRS
Seating and safety restraints
127

How does the air bag supplemental restraint system work?
The air bag SRS is designed to
activate when the vehicle sustains
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. Front air bags are designed to inflate in frontal and
near-frontal collisions, not rollover, side-impact, or rear-impacts unless
the collision causes sufficient longitudinal deceleration.
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, contact with
a deploying air bag may also cause abrasions, 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.
Seating and safety restraints
130

Several air bag system components get hot after inflation. Do not
touch them after inflation.
If the air bag has deployed,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).
²side air bags (if equipped). Refer toSide air bag systemlater in this
chapter.
²one or more impact and safing sensors.
²a readiness light and tone.
²diagnostic module.
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.
Determining if the system is operational
The SRS uses a readiness light in the instrument cluster or a tone to
indicate the condition of the system. Refer to theAir bag readiness
section in theInstrumentationchapter. Routine maintenance of the air
bag is not required.
A difficulty with the system is indicated by one or more of the following:
²The readiness light will either
flash or stay lit.
²The readiness light will not
illuminate immediately after
ignition is turned on.
²A series of five beeps will be heard. The tone pattern will repeat
periodically until the problem and/or light are repaired.
Seating and safety restraints
131

How does the side air bag system work?
The side air bag system consists of
the following:
²An inflatable nylon bag (air bag)
with a gas generator concealed
behind the outboard bolster of
the driver and front passenger
seatbacks.
²A special seat cover designed to
allow airbag deployment.
²
The same warning light, electronic
control and diagnostic unit as
used for the front air bags.
²Two crash sensors located on the
ªBº pillar.
Side air bags, in combination with
seat belts, can help reduce the risk
of severe injuries in the event of a significant side impact collision.
The side air bags are fitted on the outboard side of the seatbacks of the
front seats. In certain lateral collisions, the air bag on the side affected
by the collision will be inflated, even if the respective seat is not
occupied. The air bag was designed to inflate between the door panel
and occupant to further enhance the protection provided occupants in
side impact collisions.
The air bag SRS is designed to activate when the vehicle sustains lateral
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. Side air bags are designed
to inflate in side-impact collisions, not roll-over, rear-impact, frontal or
near-frontal collisions, unless the collision causes sufficient lateral
deceleration.
Seating and safety restraints
133

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
11 7.5A Instrument Cluster
12 7.5A Washer Pump Relay, Rear Washer
Pump Relay
13 20A Brake Pedal Position Switch, Brake
Pressure Switch
14 10A 4 Wheel Anti-Lock Brake System
(4WABS) Module, 4WABS Main Relay
15 7.5A Instrument Cluster
16 30A Windshield Wiper Motor, Wiper Hi-Lo
Relay, Wiper Run/Park Relay
17 25A Cigar Lighter
18 25A Drivers Unlock Relay, All Unlock Relay,
All Lock Relay, Power Seats
19 25A PCM Power Diode
20 7.5A RAP Module, Generic Electronic
Module (GEM), Radio, Cellular Phone
21 15A Flasher (Hazard)
22 20A Auxiliary Power Socket
23 Ð Not Used
24 7.5A Clutch Pedal Position (CPP) Switch,
Starter Interrupt Relay, Anti-Theft
25 7.5A Generic Electronic Module (GEM),
Instrument Cluster, Securi-Lock
26 10A Battery Saver Relay, Electronic Shift
Relay, Interior Lamp Relay, Electronic
Shift Control Module
27 15A DRL, Backup Lamps Switch, DTR
Sensor
28 7.5A Generic Electronic Module (GEM),
Radio, Memory Seat
29 25A Radio
30 15A Park Lamp/Trailer Tow Relay
31 Ð Not Used
Roadside emergencies
182

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
4 15A* Fog Lamps and Daytime Running
Lamps
5 Ð Not Used
6 10A* Powertrain Control Module
7 30A* 4 Wheel Anti-Lock System (4WABS)
Module
8 15A* Rear Wiper Motor
9 20A* Fuel Pump Relay and RAP Module
10 15A* Horn Relay
11 15A* Parklamps Relay and Mainlight Switch
12 30A* Mainlight Switch and Multifunction
Switch
13 15A* Heated Oxygen Sensor, EGR Vacuum
Regulator, EVR Solenoid, Camshaft
Position (CMP) Sensor, Canister Vent
Solenoid
14 30A* Generator/Voltage Regulator
15 Ð Not Used
1 -- Wiper Park Relay
2 -- A/C Relay
3 -- Wiper High/Low Relay
4 -- PCM Power Relay
5 -- Fuel Pump Relay
6 -- Starter Relay
7 -- Horn Relay
8 -- Rear Wiper Down Relay
9 -- Blower Motor Relay
10 -- Rear Wiper Up Relay
1 -- Not Used
1 -- DRL Diode
2 -- Electronic Engine Controls Diode
* Mini Fuses ** Maxi Fuses
Roadside emergencies
185