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Computers and Sensors:
A thumbnail Guide to Common Sensors
Air Bag Sensor
Detect collisions and deploys the air bags
Barometric Pressure Sensor (BARO)
Measures the outside air pressure around the engine
Battery Temperature Sensor
Monitors the battery temperature to gauge the effectiveness of the charging system
Brake Switch Sensor
Detects movement of the brake pedal
 Camshaft Sensor
Checks the engine camshaft rotation and position
Crankshaft Sensor
Checks the engine’s crankshaft position, speed and rotation
Cruise Control Sensor
Monitors the vehicle speed relative to the cruise control setting
Engine Coolant Temperature Sensor (ECT)
Measures the coolant temperature
Engine Speed Sensor
Measures the engine’s rpm
Exhaust Re circulation System (EGR) Sensor
Measures the position of the exhaust re circulation valve
 Fuel Tank Pressure Sensor
Measures the internal fuel tank pressure as part of the EVAP system of recycling fuel vapors.
Impact Sensors
Detect collision and shut off the flow of fuel to the engine
Intake Air Temperature Sensor (IAT)
Measures the temperature of air being pulled into the engine through the intake manifold.
Knock Sensor (KS)
Detects detonation, pre ignition or engine ping so the ignition system can make adjustments for optimal engine performance
Manifold Absolute Pressure Sensor (MAP)
Measures outside air pressure and compares it to vacuum inside the engine’s intake manifold
Mass Airflow Sensor (MAF)
Measures the amount of air being pulled into to the engine.
Oil Level Sensor
Measures the amount of oil in the oil pan
 Oxygen Sensor (O2)
Oxygen (O2) sensors monitor levels of oxygen present in engine exhaust and transmit data back to the on board computer.
Rotational Sensor
The rotational speed sensor compares the left rear wheel to the right rear wheel. If during an emergency stop the sensor identifies one wheel locking up, it sends an electronic signal to an electronic solenoid. |
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1. Onboard Computers and Sensors
2. Computer Chips And The Driveway Mechanic
3. Active and Passive Sensors
4. Computers
5. On-board Diagnostics
6. Computer and Sensors Wrap Up
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