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DEM-0001 AWD Not Working

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

XC70Rider
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Re: DEM-0001 AWD Not Working

Post by XC70Rider » Fri Jul 19, 2019 12:23 pm

Antoine240bk wrote: ↑
Thu Jul 18, 2019 12:22 pm
This is good! hope it will fix the problem. PN 1394416 is for the harness

I have found the connector ref here: 1J0 973 714 - 8 pins

https://www.automotive-connectors.com/1 ... re=english
I presume Digi-key matched the connector with the harness # I was searching for. Digi-key has the right connector but also ordered this using the 1J0973741 you provided:

https://www.ebay.com/itm/AUDI-VW-Skoda- ... 2749.l2649

The DEM-0007 hasn't appeared for the past 7 days. If it doesn't strike back then I'll let it be.

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Re: DEM-0001 AWD Not Working

Post by XC70Rider » Mon Aug 19, 2019 6:34 am

During the past month the DEM-007 only appeared twice. After driving it's always yellow so it's not continuously failing. Only time I saw it RED was when I started it without even driving. I cleared the code before that start so the DEM must of been feeding the pump to test for pressure.

Highest chance it's the sensor internal connection within the DEM since I broke that sensor when trying to mount the DEM onto the Haldex. Slight chance it could be the DEM harness connector I have listed in the above post.

Haven't posted lately because I'm making a career change and moving 1200 miles south. I don't want the P2 being dragged by the moving truck so I'll drive her alone late next week. If the code starts up again I'll try repairing the sensor connection within the DEM in the 2 car garage I'll have in September.

Driving 1200 miles do you suggest I pull the DEM fuse to save MPG?

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vtl
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Re: DEM-0001 AWD Not Working

Post by vtl » Mon Aug 19, 2019 6:48 am

Haldex is mostly disengaged on highway.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

XC70Rider
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Re: DEM-0001 AWD Not Working

Post by XC70Rider » Mon Aug 19, 2019 6:52 am

vtl wrote: ↑
Mon Aug 19, 2019 6:48 am
Haldex is mostly disengaged on highway.
I know the haldex engages no more 10% on highway. Before I replaced the broken sensor it was running only FWD and I did get higher MPG during that 3 week period.

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vtl
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Re: DEM-0001 AWD Not Working

Post by vtl » Mon Aug 19, 2019 7:41 am

More like 5%.

I didn't notice any significant MPG improvement when my collar sleeve did strip.
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Re: DEM-0001 AWD Not Working

Post by XC70Rider » Mon Aug 19, 2019 7:54 am

I noticed higher MPG with the broken sensor because I did mostly city driving. Being just highway during the long trip I'll let the Haldex be.

I'll drive nonstop so will check for Diagnostics using VIDA during every gas station stop.

My new garage will be twice the size of my current 1 car garage. Permanently fixing the DEM will be easier down there.

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Re: DEM-0001 AWD Not Working

Post by vtl » Mon Aug 19, 2019 7:57 am

Eh, it's all about lack of attitude :) I did a chassis swap in 1 car garage (well, technically 2, but it was too short for V70 and XC70). Though I had some space for tools, engine, body parts, etc...
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- Pete -
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Re: DEM-0001 AWD Not Working

Post by - Pete - » Fri Aug 30, 2019 10:44 pm

vtl wrote: ↑
Mon Aug 19, 2019 7:57 am
Eh, it's all about lack of attitude :) I did a chassis swap in 1 car garage (well, technically 2, but it was too short for V70 and XC70). Though I had some space for tools, engine, body parts, etc...
Ugh, I can imagine. What provoked/prompted that project (pair)?
I too know this frustration of working in a 1-stall garage, contorting when 6'4" is super fun. Lift is only 500' away, thankfully.


So John, I know we had talked about the pump rebuild kits from Latvia, did you end up rebuilding yours? Or since the codes have gone in to almost total cessation, have you just left it?


Hope the move went ok.
2001 V70XC 146k
2004 V70 AWD 141k
2004 V70R M66 144k
2004 XC70 287k
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vtl
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Re: DEM-0001 AWD Not Working

Post by vtl » Mon Sep 02, 2019 7:28 am

- Pete - wrote: ↑
Fri Aug 30, 2019 10:44 pm
Ugh, I can imagine. What provoked/prompted that project (pair)?
Forest road, icy gravel, Yokohama Geolander A/T G015 and my bad mood. I blame Yokohama :)
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mrjacobrussell
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Re: DEM-0007

Post by mrjacobrussell » Thu Dec 05, 2019 12:07 pm

vtl wrote: ↑
Fri Jun 21, 2019 9:08 pm
XC70Rider wrote: ↑
Wed Jun 19, 2019 9:01 pm
For some reason the sensor isn't getting any pressure reading. It only reads 0Mpa. The Haldex fluid is full. I tried testing the pump with a 9V battery but got no response. Does it need 12V to turn on? The pump current is reading 2.5 to 7amps. Does that verify the pump is being activated?
Healthy motor should consume about 0.7-1.3 amps. And, yes, they all die in about 10-12 years of service. I have an old working one for free if you feel you've paid enough for Haldex diagnosis ;) Located in Ashland.
Ashland Oregon ? im in kf ill take it off your hands to help test my car.. if you still have it.
2006 S60R
2005 v70R
2004 XC70
2006 v50 t5 AWD m66
2005 v50 t5 AWD

I have a Chinese DICE, works well.

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