Mercury 2001 Grand Marquis User Manual page 138

The system operates by detecting and controlling wheel spin. The system
borrows many of the electronic and mechanical elements already present
in the anti-lock braking system (ABS).
Wheel-speed sensors allow excess rear wheel spin to be detected by the
Traction Control
spin is controlled by automatically applying and releasing the rear brakes
in conjunction with engine torque reductions. Engine torque reduction is
realized via the fully electronic spark and fuel injection systems. This
process is very sensitive to driving conditions and very fast acting. The
rear wheels "search" for optimum traction several times a second and
adjustments are made accordingly.
The Traction Control
of available traction on slippery surfaces. The system is a driver aid
which makes your vehicle easier to handle primarily on snow and ice
covered roads.
During Traction Control
of sound coming from the engine compartment and the engine will not
"rev-up" when you push further on the accelerator. This is normal
system behavior.
If you should become stuck in snow
or ice or on a very slippery road
surface, try switching the Traction
Control system off. This may allow
excess wheel spin to "dig" the
vehicle out and enable a successful
"rocking" maneuver.
The traction control indicator
flashes during a Traction Control
system event.
If the traction control indicator
comes on and stays lit, either:
• the Traction Control
• the customer has disabled the system using the traction control switch
located on the left side of the instrument panel.
The Traction Control
key from OFF to ON until you deactivate the system using the traction
control switch on the instrument panel left of the steering column.
portion of the ABS computer. Any excessive wheel
system will allow your vehicle to make better use
operation you may hear an electric motor type
system requires service, or
system will be on every time you turn the ignition
Driving
TRAC
CNTL
137