P0687 Volkswagen -

Question

Hi , I have a volkswagen Jetta 2001 GLS who stopped running, the car is not starting anymore, all the wired, sensors, fuse, battery and switch are fine. The computer is indicating a fatal error P0687, what should I do?

Answer 1

P0687 ECM power relay circuit high

circuit high mean disconnection, think of this as a light bulb power goes to the bulb the ECM see a voltage consumption or voltage drop, If the buld is burnt open voltage is given the ECM see no voltage drop, and it code circuit high.The ECM power relay is also known as a load reduction relay,This are located under the dash, The load reduction relay is also called 109, make this a hobby in replacing,