A position sensor is used to tell the position, such as a position sensor used in some cars to aid parking. Similarly, a position sensor may be used in ultrasounds, to identify the position of body parts.
Parking sensors are used to alert drivers of unseen obstacles during parking maneuvers. The parking sensors that are currently used by car producers are electromagnetic sensors and ultrasonic sensors.
The speedometer signal comes from the abs system, via the rear axle speed sensor. The rear axle speed sensor is mounted on the top center of the axle. The automatic transmission also has an output speed sensor, on the rear driver side, that is used for shift timing.
The vehicle speed signal comes from the abs sensor on top of the rear axle. (used for speedometer) The transmission output speed signal comes form the sensor on the driver side rear of the trans. ( used for shift timing only)
The abs sensor on top of the rear axle is used for vehicle speed.
Disc brakes , front and rear ( there are also a small set of brake shoes in the backside of the rear rotors that are used for the parking / emergency brake )
The location varies from vehicle to vehicle. It is usally located at the rear of your transmission, where the speedo cable used to be.
The most likely culprit for a do-nothing parking brake is a misadjusted cable. Generally there is an nut that can be used for adjustment at the rear of the vehicle that will allow you to tighten or loosen the parking brake cable.
Generally a parking brake system would be the parking brake lever (either a hand activated lever with a ratcheting lock and release lever, or a foot brake pedal with a ratcheting mechanism that releases when pushed to its maximum.), cables continuing from the parking brake lever to the rear drums, and the parts inside of the standard rear drum brake that are activated by pulling the cables. This system is used to prevent a car from moving when parked on an incline, or to prevent the transmission from jamming in Park which can happen when towing a load or parking a heavy vehicle on a hill.
It is not a switch, but a speed sensor used by the anti lock braking system to sense rear wheel speed.
That depends on what speed sensor you are looking for. There are Abs sensors on the front and rear that feed the speedometer, and there are input and output sensors on the trans that are used for shifting.
The O2 sensor is located on the rear exhaust- driver's side. Easiest to get to if you rotate the engine forward and away from the firewall. I have used regular wrenches even though they sell O2 sensor wrenches.