Town Car V8-4.6L VIN W (1997)
Steering Angle Sensor: Description and Operation
An optical shock absorber electronic steering sensor (photocell), mounted on the lower steering column, is used to establish the rate of the steering wheel
rotation.
When the steering wheel rotation rate reaches 30 rpm (15 rpm for air suspension model), the output current to the power steering control valve actuator
begins to reduce, providing additional power steering assist.
Once the steering wheel rotation rate reaches 60 rpm (83 rpm for air suspension model) and greater, the output current to the power steering control
valve actuator reaches zero and full power steering assist is provided.
After the steering wheel rotation rate drops below 30 rpm (15 rpm for air suspension), the output current returns to the amount of current regulated by the
vehicle speed sensor input within one second.
