Advanced Braking

Yaw Rate Sensor

To test accelerometers you have the best “known value” on the planet, it is the planet’s constant 1-g of gravity that is keeping you from floating into space. To measure the performance of an accelerometer is to rotate it 90 degrees. When a lateral accelerometer is rotated 90º, it should read 1-G. When a longitudinal sensor is rotated on its end, it will read 1-G. This is because gravity is equal to 1-G. Since it is impossible to rotate a car 90 degrees on a lift (Don’t even try), pull the console and unbolt the sensor.

Most accelerometers are wired with three wires. These include a 5-volt power, ground and signal wires. The signal wire will vary the voltage from 0-5-volts depending on G-force