Sensors Archives - UnderhoodService
A Closer Look: Electronic Throttle Bodies

A shop’s reputation is affected by things like accuracy of diagnosis, quality of the repair, and friendly service. Equally as important is the quality of the parts installed. If the shop does everything right, and the part fails, the customer will ultimately be upset with the shop. When a new part fails, the customer is

Understanding Electronic Throttle Controls

The benefits of an electronic throttle control system include overall reliability and more efficient operation.

VIDEO: Setting The Air Gap For Wheel Speed Sensors And ABS

You should never remove the wheel speed sensor from a new wheel hub. Here’s why. This video is sponsored by GMB.

VIDEO: Brake Pad Wear Sensors And How They Work

The sensor warns you when it’s time for new brake pads. This video is sponsored by Auto Value and Bumper to Bumper.

VIDEO: Understanding The Need for Vehicle Speed Sensors

Speed sensors provide crucial vehicle information. This video sponsored by NGK Spark Plugs.

VIDEO: Mass Air Flow Sensor Diagnostics

A mass air flow sensor measures air entering the engine. This video is sponsored by NGK Spark Plugs.

Scan Tool Freeze Frames: Using Generic Data To Make A Specific Diagnosis.

As part of OBDII, Mode$02 for the logging or freeze frame data was created. This diagnostic protocol saves data PIDs and information when a code is set. In 1995, freeze frame gave technicians a powerful diagnostic tool that was previously only available on expensive factory tools. 

VIDEO: Understanding Bias Voltage

Andrew Markel goes over bias voltage and how this startup process allows a handshake between modules and sensors. Sponsored by Standard.

bias-voltage-video-featured
Aftermarket TPMS Sensors and Scan Tools

The aftermarket has grown rapidly to accommodate all the high-production road vehicles with various TPMS sensors, hardware kits and quick service scan tools with features and software to service any TPMS system.

Nissan TPMS Service

Nissan TPMS systems began appearing in 2003 as a standard feature or option on most models. And, for the past decade, the behavior of all Nissan TPMS systems is very consistent on all models. There is only one trick to service Nissan TPMS systems, and that is to buy the right tools. A TPMS tool

The Benefits and Innerworkings of Throttle-By-Wire

A simple cable linking the gas pedal to the throttle plate just wasn’t good enough for engineers, who have now complicated the design with throttle-by-wire. Why do engineers do these things to us? That expensive throttle body can’t be cheaper than a little throttle cable — or can it? Does this design provide any advantages

Throttle Actuation Controller
How Engine Coolant Temperature Sensors Influence The Modern Powertrain

  Considering that roughly 1,500 or more ­different vehicle models are introduced into our domestic market each year, it’s becoming more difficult to predict how a powertrain control module (PCM) will utilize data from a particular sensor or detect an out-of-range sensor in any single vehicle platform. The engine coolant temperature (ECT) ­sensor provides a

ECT sensor data diagnostics