Chevrolet Astra 1.6 year 2000 does not part

Hello guys I tell you if you can help me, change the butt joint of this car, the strange thing is that now the electro -ventilators turn me only when giving contact, and the hint does not work, if anyone knows the fault please can help me,

note: I have the doubt if the crap readers of the crankshaft and the cams will be sending an error signal for a poorly draft of the belt greetings.