FH12 Tachograph help

[chubert001]

Hello.
I have to square Volvo FH12. There tachograph motometer.Jest its description of the connection. I checked everything looks fine. The problem is that sometimes the car goes off but after disconnecting the cable at the gearbox from the pulse is all right. (of course no indication of tachograph). Any suggestions?

[george1]

have you tried to change the sensor ??

[chubert001]

This was the first thing I did. did not help

[dafdiagnos]

sounds like possible speed limiter or e.p. valve fault

[sinkhi]

Trouble may be in cabling to the speed sensor or sensor itself. Tends to be breaking in front of the vehicle. If the armored cable is broken, needs to be replaced. In this case the vehicle to reduce engine speed to 1500 rpm and jumps motometra seconds to 40 km mark. Forgive me my English.

[luiggii79]

read the fault code of the menu in the odometer .