The trigger for the relay is grounded through the ecm. Apparently no one has died or been injured enough to warrant an expansion of the recall to other models.
Chevrolet Suburban Questions What Role Does The Ecm Play In
Fuel pump stays on with key on. I suggest you check the net for info on how a fuel pump relay works and conduct the electrical test. Do be careful out there guys. I have a haynes manual for my 90 tsi awd that specifically states that the fuel pump should come on with the key in the on position engine off and that it will shut off after two seconds if no ignition signal is detected. Normally the fuel pump relay operates during starting and when turning off the engine. A full explanation of how the relay works and how to check it is quite long. Not only can the fuel pump relay stay on but in some cases it can shut off causing the vehicle to stall while operating and resulting in a crash.
If it is stuck the pump could continue to run. Fuel pump keeps running after vehicle is shut off and key removed to the point that the battery goes dead. Mines even done that once or twice too. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. The ground is provided electronically for a few seconds when the key is turned on and is maintained after that due to a pulse from the ignition module. It could be that replacing the relay which caused the problem to go away was conincidental.
Suspect the fuel pump relay. Why does my fuel pump stay on after i shut the key off answered by a verified gm mechanic we use cookies to give you the best possible experience on our website.
Gallery of Fuel Pump Stays On With Key On
