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ETM throttle plate difficult to move

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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chv3ch
Posts: 16
Joined: Thu Nov 06, 2014 6:32 am
Year and Model: S60 2.4T 2001
Location: South Carolina

ETM throttle plate difficult to move

Post by chv3ch »

Hi guys,
My 01 S60 2.4T went into full limp mode with ETM code. Not too many miles ago I cleaned it, so I figured the sensor has finally crapped out. New contact less sensor arrived today so I took out ETM and began installation. But I noticed the spring cannot easily return the throttle plate. Seems when I took this thing out in the past the throttle plate was easily moved and sprung back into place. Does anyone know what might be causing excess friction. I attached some pics

chv3ch
Posts: 16
Joined: Thu Nov 06, 2014 6:32 am
Year and Model: S60 2.4T 2001
Location: South Carolina

Post by chv3ch »

IMG_20210323_151601362.jpg
IMG_20210323_151601362.jpg (157.98 KiB) Viewed 742 times
IMG_20210323_151609851.jpg
IMG_20210323_151609851.jpg (155.15 KiB) Viewed 742 times

chv3ch
Posts: 16
Joined: Thu Nov 06, 2014 6:32 am
Year and Model: S60 2.4T 2001
Location: South Carolina

Post by chv3ch »

Video attached now
VID_ETM_20210323_151517853.mov
(769.25 KiB) Downloaded 34 times

EngineeringBloke
Posts: 277
Joined: Sat Sep 08, 2012 7:31 pm
Year and Model: 2006 2.5T S60
Location: Boston
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Post by EngineeringBloke »

It should not do that. Of course. You would not want to have the car stuck with a wide open throttle - it's not a Toyota or an Audi (unintended acceleration reference).

You may just need a new ETM, not just the sensor part. Or there may be some cleaning or lubrication that fixes your issue. I don't know. I would rely on expert advice here to avoid damaging your ETM.

Perhaps give Xemodex a call in Canada. They may give you an idea although they sell repairs for ETMs. https://xemodex.com/us/product/electron ... r-service/


MrBrian2000 posted that perhaps air pressure variations in the turbo engines caused excessive wear in the ETA plate gears. The gears are plastic and he noted worn teeth that resulted in two gear disks jamming or slipping. He commented that VW use the same part (Bosch ETA) but his sisters car did not have this problem (no turbo?). He has a 2006 S60 2.5T as do I.

I think this problem would be more likely in the mid range, rather than the wider open position that you see.

I just saw a video that showed an ETM opened freely the full 90 degrees, so wider than where yours is jamming.

My 06 uses an ETA, rather than your ETM, and I installed a replacement at one point. These clearly have a return spring and both of my units moved freely with no sticking.

I inspected my ETA gears which were easy to access but I don't know it that is the case for an ETM.

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