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Differential Elec. Module (DEM). How to disconnect 2 wire plugs??

Volvo XC70 This wagon/SUV crossover offers the capabilities of an SUV without SUV size.

Differential Elec. Module (DEM). How to disconnect 2 wire plugs??

  #1  
Old 04-11-2015, 06:06 PM
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Default Differential Elec. Module (DEM). How to disconnect 2 wire plugs??



I think my DEM is bad, so I removed the 2 hex bolts.

I have no idea how to fully disconnect the 2 wiring harnesses.
Do I just yank on them as hard as I can?
Is there a release tab somewhere?
 
  #2  
Old 04-11-2015, 06:42 PM
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Ok, here is a picture of the 2 clips.
Notice that tab/latch looking thing near the top of the harness base.
I tried pressing and pulling on it, but it didn't budge at all.
So, I can't even tell if that tab thingy is a latch or not.
 
  #3  
Old 04-12-2015, 10:07 AM
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Press the release to release the catch and pull the connector off. The release is the part you mention where the wiring goes into the connector.

You can put a small, flat screwdriver in there and rotate it to unlatch. Be careful not to break it though.
 
  #4  
Old 04-12-2015, 12:04 PM
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Sticking a screwdriver in the upper hole and twisting seems like i would only break the tab, b/c I do not understand what the latching mechanism actually is.
 

Last edited by Rscanl; 04-12-2015 at 01:40 PM.
  #5  
Old 04-12-2015, 01:40 PM
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Well, sticking a screwdriver in the tab and trying to pry it up broke the tab right off.

I re-installed the DEM (which was a bitch to realign while holding that loose metal gasket piece in place) and will see if a mechanic can remove the DEM.
But, with a broken tab, how much of a problem is that going to be??
 

Last edited by Rscanl; 04-12-2015 at 01:43 PM.
  #6  
Old 04-15-2015, 05:48 AM
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No problem at all if it stays connected.
 
  #7  
Old 09-20-2015, 08:54 AM
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Replaced the entire AOC and DEM controller. 675$ used and refurbed from Erie Volvo with lifetime warranty. Not to shabby. Installed and used gl-5 80w for the gear oil. My question is even though the part came off the exact same vehicle, do I still have to flash the ecu? I'm still getting the anti/skid service required message even after resetting the ecu by disconnecting the battery. And it's hard to tell if it's actually working without slippery conditions. I also have to replace my yaw sensor and a tone ring. Would those defects mess with the operability at all?
 
  #8  
Old 09-21-2015, 06:17 PM
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Originally Posted by Essix View Post
Replaced the entire AOC and DEM controller. 675$ used and refurbed from Erie Volvo with lifetime warranty. Not to shabby. Installed and used gl-5 80w for the gear oil. My question is even though the part came off the exact same vehicle, do I still have to flash the ecu? I'm still getting the anti/skid service required message even after resetting the ecu by disconnecting the battery. And it's hard to tell if it's actually working without slippery conditions. I also have to replace my yaw sensor and a tone ring. Would those defects mess with the operability at all?
So awd isn't engaging, anti skid service required message is still up. Tried to climb a small hill and front tires spun but limited power from the back. Is a software update needed when changing out the Sox and DEM unit? Or could this be something totally different? When I had it on the lift the rear tires would spin but barely any power to them. So I'm not thinking the angle gear is gone.
 
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