Table of Contents
Where is the DME relay on a Porsche 911?
The relay is under the driver’s seat next to the dme computer.
What is a Porsche DME relay?
The single DME relay in your Porsche is actually two separate relays cunningly combined inside just one black-plastic housing. 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.
What does DME relay stand for?
DDE stands for Digital Diesel Electronics and DME stands for Digital Motor Electronics and this is what you have.
Where is the DME relay on a Porsche 944?
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. On later 944s and 951s, the relay is located in the fuse /relay panel in the rear left side of the engine compartment close to the windshield and A-pillar.
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 is DME DDE?
DME – Digital Motor Electronics. DDE – Digital Diesel Electronics. ECU – Electronic Control Unit.
What is a DME on a 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.
How do I know if my DME is bad?
Common Signs of a Faulty BMW DME, ECU, ECM, PME
- Sudden jerking or stopping while shifting gears, even though you maintain your transmission properly.
- Fan running on High.
- Unexplained error codes when all components have been tested or replaced.
What is DME in Porsche?
What does a DME report show?
A complete DME read is a check of all systems in the car. You’ll notice at the top that you’ve posted page 39 of 89 pages. Thus, a printout of all checks would be like a book. In terms of over-rev ignitions, you have 1859 in Range 1 and none in the higher ranges.
How does the DME relay work in a Porsche?
When you switch on the ignition the ECU sends a current to the DME relay which then switches on the ECU ready to control the engine. 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.
Where are the relays located on a Porsche 911?
Relay and module positions are included in the comprehensive list of electrical components in Table b. The last column of the table refers to photos or line art in this section which illustrates the component. The front fuse and relay panel is mounted in the left side of the luggage compartment.
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
What kind of repair can I do on a Porsche 911?
This repair group covers repairs to the fuel tank, fuel pump, fuel level sender and connecting lines. The Motronic (DME) fuel injection and emission control systems are covered in 240 Fuel Injection.