This should be called grass root trouble shooting. My sprinter went into the shop 2 months ago for oil leak, the mechanic determined that oil cooler gasket was bad. We decided that he’d fix it and for some reason he offered to replace the rear main seals also. I went back a month in to discover that van was still leaking when driven and this time it was transmission fluid. I took closer look and discovered the transmission adapter was broken off and Christmas tree wires hanging freely. The mechanic have been test driving the van not knowing that transmission harness is out. Fast forward to after buying and installing new harness adapter with “wiring diagram”, van has currently refuse to start. It’s now same problem as this video and last I heard, the transmission module is fried and he’d be ordering one. Not that I’d be paying for all the carelessness, I was just curious why a van would suddenly be unresponsive.
@jordysandino6577 - Hi. The reason of desoldering the pins is because their solder cracks due to the heat. You cannot tell that the solder is cracked, unless you view them under a camera (microscope).
It sounds like you have the same problem as I had. Try and do what I did, it might solve your problem. It's important to notice if the engine stop when the weather is hot. Good luck!!!
Most of these units are made using lead free solder, i found this out on a a b s module on a volvo, this solder is crap, it is so bad, that it is not allowed in aircraft components.
looks like its a relay problem, there is no heater coil light when you turn the key. there will be corrosion in one or two of the relays above the fusebox. swap these out. check sprinter relay no start on youtube.
