How to Troubleshoot P0717 Input Speed Sensor Issues

AvatarByCarl Frisch

The P0717 Input Speed Sensor is a type of sensor used in modern vehicle engines to measure the rotational speed of the input shaft. This type of sensor is typically used in vehicles equipped with electronically-controlled automatic transmissions, allowing the engine computer to accurately determine the input speed of the transmission and adjust engine parameters accordingly. The sensor can be located near the transmission or on the back of the engine, and is typically connected to the ECU (Engine Control Unit) via a wiring harness. The P0717 Input Speed Sensor is an important component in modern engines, as it helps to ensure that the transmission shifts smoothly and efficiently while also improving fuel economy.

Automobile Input Speed Sensor

What is an Input Speed Sensor?

An input speed sensor, also known as a P0717 input speed sensor, is an electronic device that measures the rotational speed of a motor or engine shaft. It is used in automobiles to monitor the rotational speed of the crankshaft and to ensure smooth operation of the vehicle. The input speed sensor works by sending an electrical signal to the Electronic Control Unit (ECU) when it detects changes in the rotational speed of the crankshaft. This signal allows the ECU to adjust parameters such as fuel injection and ignition timing, ensuring optimal performance and fuel economy.

Functions of an Input Speed Sensor

The primary function of an input speed sensor is to measure the rotational speed of a motor or engine shaft. It works by sending an electrical signal to the ECU when it detects changes in the rotational speed of the crankshaft. This signal allows the ECU to adjust parameters such as fuel injection and ignition timing, ensuring optimal performance and fuel economy. Additionally, it can be used to monitor engine temperature and detect potential problems with other engine components.

Components of an Automobile Input Speed Sensor

An automobile input speed sensor consists of two main components: a magnetic pickup device and a Hall effect sensor. The magnetic pickup device consists of two coils and a magnet which generate an alternating current when triggered by changes in rotation, such as when accelerating or decelerating. The Hall effect sensor contains a tiny semiconductor chip which detects changes in magnetic field intensity caused by changes in rotation. When triggered, it sends an electrical signal to the ECU, allowing it to make adjustments for optimal performance and fuel economy.

Working Principle of Automobile Input Speed Sensor

The working principle behind an automobile input speed sensor involves two main components: a magnetic pickup device and a Hall effect sensor. The magnetic pickup device consists of two coils and a magnet which generate an alternating current when triggered by changes in rotation, such as when accelerating or decelerating. The Hall effect sensor contains a tiny semiconductor chip which detects changes in magnetic field intensity caused by these same changes in rotation. When triggered, it sends an electrical signal to the ECU, allowing it to make adjustments for optimal performance and fuel economy.

Types of Automobile Input Speed Sensor

There are two main types of automobile input speed sensors: variable reluctance sensors and active devices. Variable reluctance sensors use magnets embedded within their construction which react with ferrous materials within their environment; this allows them to detect small changes in rotating speeds without being affected by any external factors like temperature or humidity variations. Active devices use integrated circuits which can be programmed externally; they are highly sensitive but require additional power sources for operation as well as additional wiring for installation purposes.

Advantages and Disadvantages of Input Speed Sensors in Automobiles

Input speed sensors offer numerous advantages and disadvantages depending on their design type; however, some general advantages include durability, ease-of-installation, low maintenance costs and accurate readings at low speeds due to their sensitive design features – all features that contribute towards increased efficiency for vehicle operation overall . Some disadvantages include high initial costs due to their complex construction as well as requirements for special wiring during installation procedures .

Mounting Requirements for Installing an Input Speed Sensor in Automobiles

Installing an automotive input speed sensor is a straightforward process that requires minimal effort. The mounting requirements involve ensuring that the sensor is securely mounted to the vehicle’s frame. It should be placed near the transmission in order to measure the rotational speed of the output shaft. Before installation, it is important to check if the sensor is compatible with the car’s make and model. Additionally, there should be enough clearance around it so that it does not interfere with any other components or wiring.

Wiring Requirements for Installing an Input Speed Sensor in Automobiles

The wiring requirements for installing an input speed sensor are fairly simple. The power supply for the sensor must be connected to a 12-volt source and should use wire Gauge 14 or larger. Additionally, it should be wired directly to the Powertrain Control Module (PCM) using shielded wire and shielded connectors where possible. When connecting the ground wire, ensure that it is securely attached to a good ground point on the vehicle’s frame. Lastly, all connections must be properly insulated and secured with electrical tape or shrink tubing.

Troubleshooting Tips for Common Issues with Automotive Input Speed Sensors

When installing an automotive input speed sensor, it is important to troubleshoot any issues that arise during the installation process. If there are any discrepancies in readings from the sensor, then there could be a problem with either its mounting or wiring. Additionally, if there are false readings coming from the sensor then this could indicate a faulty connection or insufficient power supply voltage. To rectify this issue, check all connections and ensure that they are securely attached and correctly insulated as necessary.

Common Applications of Automotive Input Speed Sensors

Automotive input speed sensors are used in a variety of applications including engine control systems, transmission control systems and cruise control systems among others. They provide precise measurements of engine output shaft speeds which can help improve fuel economy and performance when used in conjunction with other components such as throttle position sensors and exhaust gas recirculation valves (EGR). Additionally, they can also be used to monitor wheel speeds for ABS systems as well as traction control systems (TCS).

Key Manufacturers and Suppliers of Automotive Input Speed Sensors

There are many manufacturers and suppliers of automotive input speed sensors on the market today. Some of these include Bosch, Delphi Technologies, Denso Corporation, Hitachi Automotive Systems Ltd., TRW Automotive Inc., Cummins Inc., Eaton Corporation Plc., Infineon Technologies AG., Robert Bosch GmbH and Danaher Corporation among others. Each supplier has their own unique range of products so it is important to research them thoroughly before making a purchase decision.

FAQ & Answers

Q: What is an Input Speed Sensor?
A: An input speed sensor is a device used in automobiles to measure the rotational speed of the transmission’s input shaft. It sends a signal to the engine control unit (ECU) which then uses this information to adjust fuel and spark timing.

Q: What are the components of an Automobile Input Speed Sensor?
A: The components of an Automobile Input Speed Sensor are a magnetic pickup device and a Hall Effect sensor. The magnetic pickup device detects changes in the magnetic field caused by the rotation of the transmission’s input shaft and creates an electrical signal that is sent to the ECU. The Hall Effect sensor detects changes in voltage caused by changes in the rotational speed of the input shaft and sends a signal to the ECU.

Q: How does an Automobile Input Speed Sensor work?
A: The Automobile Input Speed Sensor works by detecting changes in either magnetic fields or voltage created by changes in rotational speed of the vehicle’s transmission’s input shaft. The signals are then sent to the ECU which uses them to adjust fuel and spark timing for optimal engine performance.

Q: What are some common applications for Automotive Input Speed Sensors?
A: Automotive Input Speed Sensors are used mainly for controlling fuel and spark timing in vehicles, but they can also be used for controlling other vehicle functions such as transmission shifting, cruise control, traction control, and anti-lock braking systems.

Q: Who are some key manufacturers and suppliers of Automotive Input Speed Sensors?
A: Some key manufacturers and suppliers of Automotive Input Speed Sensors include Bosch, Delphi, Denso, Hella, Hitachi, Valeo, Magna, Continental AG, ZF Friedrichshafen AG and many others.

In conclusion, the P0717 input speed sensor is a vital component in maintaining the efficient operation of an automobile. It helps to ensure that the vehicle is able to change gears at the right time and without any mechanical issues. The P0717 input speed sensor can be found in most modern cars and should be checked regularly to ensure it is working correctly. Without this component, an automobile would not function as efficiently or effectively as it should.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

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