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15:20:30 - 04/26/2024
General Dakota Board
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Greendak01
Dodge Dakota
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2/26/2009
02:22:29
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 Subject: help please
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Message:
My check engine light came on for the code P1494 SPCUT Solenoid Circuit Malfunction....does anyone know what this is???? what kind of solenoid is it and wehre is it at???
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Dodge Dakota
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2/26/2009
09:05:31
|  RE: help please
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Message:
"Leak detection pump switch or mechanical failure"
You were in the area of the ldp solinoid.Its a electrical switch with 2 wires and 2 vacuum lines connected to it.I would follow those lines and make sure the one that goes to the manifold is still hooked up and that you have vacuum to the solenoid.The other line makes its to nvld which is mounted below the steering gear.But first it will go under the air cleaner housing.It will have a plastic or steel line with a rubber hose junction in a couple of places.The rubber hoses will crack and leak and could be the cause of your problem.But retrace your steps to make sure you didn't knock any lines loose.
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The leak detection pump is mounted in the engine compartment on the driver's side inner fender. It will be under the purge solenoid and it has a 3 wire connector that goes to it. The orange wire should be hot when the ignition is on. If it isn't, you probably have a blown fuse. If it is, the green/red wire should get a ground from the PCM that can be measured with a DVOM on the duty cycle setting. The violet/white wire is the sensor feedback to the PCM to tell it what it is doing. Any number of things can cause this code. It needs a vacuum source to it, and it works in conjunction with the EVAP purge solenoid. Anything from electrical to a vacuum leak or a even a bad canister or purge solenoid can cause it.
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