93 jetta gl

[socalguy]

Need help in getting a second opinion regarding my diagnostic .Fuel pump is working fine based on direct test. Found out that no power goes to the fuel pump from the pump relay . Further test shows no ground supplies the coil inside the relay to activate the contacts.Would this be a case of a malfunctioning computer??? I got power on one side of the coil relay and power supply to the pump.Thanks

[boschmann]

The ECM will only generate the ground to trigger the relay if it sees signal that the coil is firing. Do you get a spark when cranking? It should also ground for a couple of seconds when the key is first turned to on.

[socalguy]

Originally Posted by boschmann

The ECM will only generate the ground to trigger the relay if it sees signal that the coil is firing. Do you get a spark when cranking? It should also ground for a couple of seconds when the key is first turned to on.

thanks Boschman for your reply . I can make the car run by bypassing the relay coil . I jump the 2 terminals that powers up fuel pump and the car runs.I got power from the relay coil but dont have ground on the other side .So my I think that the computer doesnt trigger any ground to to complete the circiut for the relay coil which will trigger the contacts to power the fuel pump.

[boschmann]

Before replacing the ECM you should check the continuity of the wire from the relay to the ECM. The ECM connection is at pin number six, yellow/blue wire. The connection at the back of the fusebox is at connector G1, pin #3.