What is DME relay?
What is DME relay?
A digital motor electronics relay is nothing more than two relays built into one case — it has two coils and two switches. It is used to control the switched-power circuit for the DME module, the fuel injectors and the fuel pump.
What is DME on Porsche?
Digital Motor Electronics (DME) is a microprocessor based system that controls the ignition, fuel injection, oxygen sensor, and numerous ancillary functions of an automobile. DME can fine-tune the engine hundreds of times a second to provide maximum performance and efficiency.
Where is the DME relay on a Porsche 911?
On the 84 to 89 911s, the DME relay is located under the left front seat directly adjacent to the DME box. On the 90 and up 911s, it is mounted in the fuse box. Contained within the relay are actually two relays which operate in sequence of the other.
What is the DME?
Equipment and supplies ordered by a health care provider for everyday or extended use. Coverage for DME may include: oxygen equipment, wheelchairs, crutches or blood testing strips for diabetics.
What does BMW DME stand for?
Digital Motor Electronics (DME). The comprehensive management system for your engine: Digital Motor Electronics (DME) controls all key aspects of the engine’s operation, ensuring optimum reliability, maximum performance and the lowest possible fuel consumption and emissions.
Where is the DME relay on a Porsche 944?
If your Porsche 944 will not start or suddenly dies on you, one of the first places you should check is the DME relay. On the older 944s, the relay is known as the fuel pump relay and is located on the fuse panel under the dash on the driver side.
What is a DME relay on a BMW?
BMW Z4 sports cars are equipped with digital engine management systems (called Digital Motor Electronics or DME). The DME main relay, the primary power source for nearly all engine management functions, supplies battery power to the engine ECM when the ignition is activated.
Which faulty ignition component can result in a no start condition?
Car not starting: Another symptom of a faulty ignition relay is a no power condition. If the relay fails it will cut off power to fuel pump and ignition system, which will result in a no power, and therefore no start condition.
What are examples of DME?
DME includes, but is not limited to, wheelchairs (manual and electric), hospital beds, traction equipment, canes, crutches, walkers, kidney machines, ventilators, oxygen, monitors, pressure mattresses, lifts, nebulizers, bili blankets and bili lights.
What is the function of DME?
The Distance Measuring Equipment (DME) is a radio navigation aid used by pilots to determine the aircraft’s slant range from the DME ground station location. The DME avionics in aircraft send a pulse signal to the ground based DME, which responds with an answer pulse signal.
Where is the DME relay on a Porsche 924?
That said, some DME relays are remarkably awkward to get at. In the 924S and earlier 944s, for instance, it’s not only right up under the passenger’s side of the dashboard, but also neatly obscured by an additional fuse holder which you have to unscrew that and move gently out of the way for better access.
Where is the fuel pump relay located on a Porsche 964?
Inside the main fuse box at the right-hand rear corner of the luggage compartment. The 964 Turbo (but not the 993) has a conventional fuel-pump relay located in the fuse box 944, 1982–85; 924S, 1985–88
Do you need a spare DME relay in a Porsche?
One: that you should always carry a spare DME relay in the car, just in case the original unit (however new it might be) lets you down and leaves you stranded. And two: precisely where in your Porsche said relay is located. However, if you want to know more, then here goes…
Where does the power come from in a DME relay?
Then when the the starter motor is cranked, the ECU activates the second relay in the DME relay and power is supplied to the fuel pump for as long as the engine is running. In the other cars power comes from the ignition switch direct to the DME relay.