Maintenance

Tire pressure monitoring systems

Tire pressure monitoring systems

A tire pressure monitoring system (generally referred to as TPMS or TPM) is relatively basic in terms of the number of involved components. The pressure sensor transmitters (one transmitter mounted inside each wheel) monitor inflation data and send an FM radio signal to the system’s antenna and receiver, which then sends a digital signal to an ECU. Note that some vehicles may be equipped with one central antenna, while others feature individual antennas in the wheelwells at each corner.
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Testing Snap-on's electronic torque/angle wrench

Testing Snap-on's electronic torque/angle wrench

Anyone who has serviced engines (as well as certain driveline and chassis components) that date from roughly the early 1990s to the present is aware that many OE threaded fastener tightening requirements call for a combination of torque-plus-angle specifications as opposed to a torque-only spec. Common applications for this procedure include but are not limited to cylinder head fasteners, main cap fasteners and connecting rod bolts.
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Ignition coils -- What every tech needs to know

Ignition coils -- What every tech needs to know

The process of burning fuel and air powers most of the vehicles in the U.S. and around the world. At its most basic level, this combustion is a chemical process. The burning of fuel and air requires first that the two gasses be mixed, compressed and then ignited by the addition of heat.
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Get the most from your multimeters

Get the most from your multimeters

That multimeter in your tool box probably cost you a pretty good piece of change when you bought it. If your digital multimeter (DMM) isn’t solving problems and making money for you, it should be.
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