No signal to injectors, 1999 S80

burnside318 · Post by **burnside318** » 06 Sep 2008, 10:21

I've got a '99 S80 that had water get into the computers. Since the computers shorted out, the front airbags deployed. Now I have new computers in there and I am just trying to get the car to run on its own. I have not done anything with the airbags yet, but I checked all wire connections and they look fine in the whole car. The only thing that doesn't work at this point is the fuel injectors. I am not getting the ground pulse from the computers. Any suggestions? I have fuel delivery to the injectors, but no signal. . .The car will start with ether, but because it isn't getting fuel, it won't run.

Post by **MadeInJapan** » 06 Sep 2008, 11:04

Welcome to MVS. Because you've probably shorted the wires to the injectors you'll have to back probe them from the injectors to the computer with a VOM in order to know where the short is. Could be that the coil packs at the plugs got fried.

Also, moving this to the S80 section as you're in the wrong part of the forum.

Post by **VCA** » 06 Sep 2008, 21:02

burnside318 wrote:I've got a '99 S80 that had water get into the computers. Since the computers shorted out, the front airbags deployed. Now I have new computers in there and I am just trying to get the car to run on its own. I have not done anything with the airbags yet, but I checked all wire connections and they look fine in the whole car. The only thing that doesn't work at this point is the fuel injectors. I am not getting the ground pulse from the computers. Any suggestions? I have fuel delivery to the injectors, but no signal. . .The car will start with ether, but because it isn't getting fuel, it won't run.

Have the replacement computers had their respective software downloads done? If not, then the immobilizer can't signal the computer to allow the engine to start. There is a network reload part number in VIDA that your dealer can order for $45 which will recode all the modules in the car if need be.