VOLVO Speed Sensor

Ok, do u know what ECM VSS wires run to?

 

Really wires run to VECU throught MCFC connector (chassis-cabin)

U can find wires 500-501 (twisted pair). They run to B6-B20 pins on VECU

just rewire to be sure

 

Today I'll replace the speed sensors and test drive it.
Will let you know.
Thanks!

 

One of the speed sensors had a little oil. The other was old.
Unfortunately the truck is still the same.
No codes to read and speed 50 m/h max.
I took it to the Volvo dealer. We'll see.

 

may be u have other problem, like low fuel pressure and engine wont running well

 

A friend said it could be the fuel pump.
It's at the Volvo dealer. I'll let you know.
Thx.

 

Hola Pablo..Tengo un 2011 Volvo VNL 670..Me podrías decir en dónde se encuentra el sensor de la velocidad?..Es que no marca la velocidad,hasta él cambio 8,y no sube los RPM a mas de 1300,en los cambios del 1 al 8..Se jalonea,como que se ahoga..Cuál creé Ud que seria él problema?..Mi nombre es Leo

 

Leo, VSS is always installed on tail of transmissin

If VSS signal is bad VECU limits engine RPM.

What kind of VSS is used - it depends on tranny brand and market. For US vehicles magnetic sensor is the most popular. But with zf transmission switched type (really hall effect sensor) may be used.

In EU they use tachographs and it sends speed data to VECU and engine ECM.

So depending on tranny brand pulses per DS revolution differ too (16 ore 8).

 

Hello Pablo, ive been trying to get a hold of you. I have a big mess with my 05 volvo with cummins engine. It has 5 computers burnt and a broken data link. i dont have vommunication with any computers.. could you help or shoot me a private message please.. ive been down for a month already..

 

for datalinks and can lines volvo use twisted pairs

with the same problem i use to rewire. cut and put new wires

But IMO, stock wires are too weak and I use 2x1mm2 cabel for outdoor application



try it) I can help with diagram too.