How much volt should it be to camshaft sensor?

[zibpka]

Since i already sent the ECU already can i still measure the ovp without it?
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[grober]

Yes its input and output voltages should not be affected by what its connected to. Basically its a pass thro device 12volts in--- 12volt outputs its function is to prevent any voltage higher than 12 volts from reaching various sensors the ABS unit and the ECU.
Most people test them by substitution if they are suspect. If you find you are getting 12volts in and a lot less out its probably faulty

 

[markmifsud]

Connector N3/4 HFM-SFI control module
Pin1.17 CMP Sensor signal output to diagnostic module
Engine at idle 1.3 - 1.7 vdc (value alternates)
Generated by B6/1

 

[zibpka]

Thanks for that info markmifsud. whats meaning by pin 1.17?
may i ask where you find that info?
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[Alex]

If the sensor is supplied by the relay module = OVP relay? it's possible there's a fault there
see
http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1995/C280/SYSTEM WIRING DIAGRAMS/5342.pdf
and
http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1995/C280/SYSTEM WIRING DIAGRAMS/5343.pdf

The OP maintains that he’s got a 2 wire sensor not 3.

 

[zibpka]

The OP maintains that he’s got a 2 wire sensor not 3.[/QU

 

[zibpka]

This is my camshaft sensor and that is 2 wiring from what i can tell
Do not the OVP problem relates to the 2 wire sensor?

 

[Alex]

This is my camshaft sensor and that is 2 wiring from what i can tell
Do not the OVP problem relates to the 2 wire sensor?


View attachment 79480

As mentioned before, if it’s a 2 wire sensor, there won’t be any power coming from the relay.

 

[zibpka]

How does the ECU gets power with the 2 wire sensor then?

 

[Alex]

Serious question? Ferromagnetism. Your crankshaft sensor is a reluctor and has only two wires. By moving a ferrous object away from or to the sensor, the magnetic field (generated by a magnet inside it) is changing. This in turn changes the voltage output by the sensor and captured by the ECU. Your two wire camshaft sensor works in exactly the same way.

 

[zibpka]

Now i have tried with with another harness and still got the same problem. Also sent the ECU to be checked up, They couldn't find anything wrong with it but they also couln't garanteed anything.
Im running out of optionens.
Could the tightining of the camchain matter?