• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Volco ec240 cam position sensor

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,518
Location
Will county Illinois
Occupation
Mechanic
The testing provided shows the value you should see. The pinout will be the same. You are verifying the integrity of the wiring from the ecu out to the sensor. The resistance of the sensor, and whether or not either of the wires are grounded or open.
 

kevman6

Well-Known Member
Joined
Jul 10, 2016
Messages
237
Location
cadillac, Mi
YES, fuse cabinet is right behind the cab. I traced the wires back from the cam sensor This is not making sense to me. The wires from the Cam sensor are hard bundled (3) Yellow and two black in one jacket. They go directly to the crank sensor. There are no other wires coming from either sensor. Plug them together and the engine won't start. It will start with the Cam sensor unplugged from the Crank sensor and run good. Unplug the Crank sensor and the engine will not start. Where is the ECU getting is reference from if the Crank sensor and Cam sensor only connect to each other? No other wires coming from either.
The wires to the Cam sensor only have .19 V to the sensor with the ignition on
 

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,518
Location
Will county Illinois
Occupation
Mechanic
So at the engine ecu connector EA pin 45 and 46 is there continuity with the cam sensor unplugged? Is there continuity to ground? Please check. It seems you're close to finding the problem.
 

kevman6

Well-Known Member
Joined
Jul 10, 2016
Messages
237
Location
cadillac, Mi
Having trouble finding the wires at the ECU. Two gigantic plugs with huge bundles of wires. Wires at the sensors are three wire, not two. Yellow and two black. I'm assuming that's the ECU behind the fuse box with two big plug connections on it
 

BigWrench55

Senior Member
Joined
Oct 11, 2018
Messages
1,176
Location
Somewhere
I'm not quite following what you're saying. From the schematic they are both on their own circuit. SE2703 which is the sensor on the flywheel shows to come from pin location EA46 at the ecm. And pin location #2 at the sensor harness which is the brown and white wire on the engine harness side. The yellow wire is pin location EA45 at the ecm and pin #1 at the sensor harness. I don't see where they are connected to each other. Does any of those wires have continuity from ecm to where it plugs into the sensor. Or shorted to ground or voltage. I believe that your engine ecm is next to the fuse panel. One connection will be EA and the other EB.
 

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,518
Location
Will county Illinois
Occupation
Mechanic
Look for connector CNED which should be a square large connector up near the FCV . It should be mounted in a tin bracket with a torx or alan screw holding together. A twisted pair can rub through each other in the wraps. Once you've identified where the short is, you can go after it or run a separate circuit outside of the loom. When measuring, if shorted to itself, disconnect CNED. If short goes open, measuring at conn EA, you know the problem lies in the engine harness. Then you would measure from CNED 13 to CNED15.
 

BigWrench55

Senior Member
Joined
Oct 11, 2018
Messages
1,176
Location
Somewhere
OK. I am about to fire up the laptop and look for a different schematic. I wasn't prompted for a serial number break when looking up these files.
 

kevman6

Well-Known Member
Joined
Jul 10, 2016
Messages
237
Location
cadillac, Mi
Where does the wires head back to the ECU They only go from one sensor to the other, unless I'm missing something
 

BigWrench55

Senior Member
Joined
Oct 11, 2018
Messages
1,176
Location
Somewhere
If you disconnect the harness from the ecm and look on the side going into the ecm. There are numbers at the end of the rows. For example one row would have a #1 and at the other end #15. So that row would count down the line 1-15. That's how you can find pin EA45 and EA46.
 

kevman6

Well-Known Member
Joined
Jul 10, 2016
Messages
237
Location
cadillac, Mi
I had no continuity between 45 or 46 at the ECM and Cam sensor harness connector. When probed with a power probe, at the Cam sensor connector with key off, I had no ground and residual static buzzing at the Yellow wire and one of the black wires. I also checked the Cam end of the harness to the Crank sensor end for continuity between the two ends of the harness, with nothing. I did that because it appears the two are connected by the solid 3 wire hard molded wire harness. Yellow and two black molded together
 

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,518
Location
Will county Illinois
Occupation
Mechanic
Are you perhaps describing a shield wire or shielding jacket. Twisted pairs often have a 3rd wire wrapping the pair or a foil jacket wrapping the pair to shield RFI from affecting other circuits.
Can you attach a pic or 2? Again...
 

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,518
Location
Will county Illinois
Occupation
Mechanic
You're still looking at 2701 & 2703. Cam is 03 crank is 01.
EA5 should be ground and common to pin 3 of each sensor. There should be no continuity to pin 1 or 2 of either sensor. Pin 1 to pin 2 should measure approximately 3900 ohms.
This rectangular connector should be buddied up with another in the same housing. EA is on top EB is on bottom. EB us where the harness comes out of the housing.
I believe you will have this big round cannon plug for engine harness to the machine. Please see the attachment
The sensor should ohm out at 3.9k ohm.
 

Attachments

  • 20210925_165825.jpg
    20210925_165825.jpg
    5.7 MB · Views: 6
  • 20210925_165859.jpg
    20210925_165859.jpg
    2.4 MB · Views: 6

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,518
Location
Will county Illinois
Occupation
Mechanic
nevermind that the schematic says it is for a 160, it is the same up until 330 where the begin using big bore engines. All the deutz in lighter machines are looking for the same values. What matters is that you get the right configuration. Can you upload an away pic of your engine so we can see what fuel system you have. It seems like you have a tier 3 machine with a tier 2 engine. Just trying to get you the best possible info.
 

Attachments

  • sch 18.pdf
    735.7 KB · Views: 7
  • 128 passive.pdf
    346.4 KB · Views: 4
Top