Skip the auto shop - Our mechanics make house calls

Q: My suv wont start. It shows DSC malfunction and 4x4 problems.

asked by on

Where is the location for the dme main relay?

My car has 49800 miles.
My car has an automatic transmission.

The DME relay is a dual relay that powers the fuel system. This relay is typically located in the fuse box located inside of the ECU compartment. There will be several locations in the vehicle that will house fuses and relays. Your owners manual may have more information on this.

A code failure with the DME relay may be related to the throttle control actuator. The fuse itself is rather large and would take a serious power surge to damage. If it is faulty, something is to blame.

The throttle control module regulates the throttle and keeps enough gas going into the engine to keep it from stalling. If it is not telling the pump to fuel the engine correctly, the vehicle will not start.

If you are having your vehicle scanned by a generic scan tool, the codes for other issues will come up more generic. Make sure you are using a BMW or equivalent scan tool. If you need assistance with this, consider YourMechanic, as one of our mobile technicians can come to your home to diagnose your no start condition and help you fix it accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Keeps dying and won't go past 20

A few different things can cause the engine to knock like this. The most likely would be low fuel pressure, the wrong octane gasoline, or an extreme misfire. I would not drive a vehicle that is knocking this badly as...

Q: engine not starting

Hi there. From the description you have provided, concerning your vehicle's no start, it is difficult to answer which component could have failed. A no start condition could be, any number of things. Accessing the vehicle's PCM (powertrain control module)...

Q: Its shutting off while driving

Your symptoms suggest that there is a short or other electrical current draw that is playing havoc with your electrical system. GM issued a recall (Recall 12V406000) for a problem with shorts in the door lock control module, overheating electrical...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.