Question about 1990 Dodge Dakota
We checked the fuels pump, the fuses, all works, we cleaned out the carburator, the jets, works, only the relays on the carb we could not check
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Posted on Jan 02, 2017
the auto shutdown relay is usually right next to the fuel pump relay and there will be a starter relay and fan relay also.
Posted on Jun 20, 2009
SOURCE: my 98 dakota wont fire
Check your Automatic Shutdown Relay in your fuse and relay box under the hood by the battery. The power supplied to the fuel pump, ignition coil, fuel injectors, and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD); the idea is to shut off fuel pressure and the ignition systems when the key is turned off to prevent fires, dieseling, and other problems.
The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module. This causes the engine to shut down.
The logic module monitors the relay driver. If it senses that the relay driver is not responding correctly it will trigger a code. If the logic module does not sense an absence of current when the circuit is open, or 12 volts DC when the circuit is closed, it knows that the circuit is open or shorted, and triggers code 42. Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start. Good luck and hope this helps lead you in the right direction. Hint: The ASD can be triggered by a broken wire or short in another place, e.g. the fuel pump.
Posted on Jul 04, 2009
it doesn't have a fuel pump relay it has a fuel pump control unit and it is located on the chassis back quarter drivers side near the tube cross member for chassis on top of chassis rail near bed mount. locate the rear springs front perch and it will be above that on top of rail.
hope this helps. good luck and please ask any question you have.
Posted on Oct 25, 2009
Testimonial: "Thanx for info..no wonder I couldn't find Relay! "
First check any ignition/fuel related fuses. Check to make sure you have 12 volts coming into the pump and coil. If nothing to the fuel pump replace the fuel pump relay - if you do have power to the fuel pump then replace the pump. If nothing is coming to the coil it is either an ignition relay or a wiring issue. If you have 12 volts to the coil but no spark then replace the coil.
Also the fuel pump/relay would not kill the coil.
Posted on Jan 21, 2010
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