It's on the fuse block under the dash with the rest of the fuses it should be relay numbered 109 in big white letters
The Volkswagen Jetta uses an ECM instead of a stand alone fan relay. The ECM has to be changes as a single unit.
Relay #428 under the hood is the ECM Power Control Relay.
There isn't one, its wired into the ECM.
The ecm module is located behind the passenger side kick panel. I don't know of an ecm relay.
There is no timing set for a 2004 jetta, the timing is automatically set by the ECM.
were is the location ecm on a 1996 Nissan maxima
Bad ECM or ECM relay.
The fuel pump works through the fuel pump relay which in turn works through the ECM relay. This does not answer the question of where these relays are and wich ones they are.
It's programmed into the engine ECM. You need to either replace the ECM, or have the existing one reflashed with new parameters.
ECM is located on drivers side, below the base of the windshield underneath the plenum. You have to remove plenum panel for access.
i do believe it is the ecm/computer
not sure of your question, but, the relay is mounted under or behind the engine computer or ecm.. you have to remove the ecm to find the relay. It is on the inside of the firewall in the middle behind the radio. Good luck