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C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models |
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CEM clean now PS (EPS) pump on all the timeViews : 2747 Replies : 34Users Viewing This Thread : |
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Oct 21st, 2018, 00:02 | #1 |
Junior Member
Last Online: Aug 8th, 2019 23:34
Join Date: May 2012
Location: Birmingham
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CEM clean now PS (EPS) pump on all the time
An unusual condition has occurred on our 2005 2.0d s40 not the 'common' power steering failed but instead our power steering pump is on constantly, engine on or off, car unlocked or locked....
Some background about how this started.... I had the brake failure stop safely message and then a whole host of other messages and ultimately the car wouldn't accelerate and then stalled. There were no issues or warnings with the steering. Following some research it pointed to poor connections on the cem under the glove box. I took it out and cleaned every connector, relay and fuse using electrical contact cleaner and then reassembled. When I connected the battery I could hear what sounded like a relay clicking at the front of the car near the radiator and net headlight. Then I could hear the steering pump had activated (while I was tightening up the 10mm battery terminal). I disconnect the battery, took out the battery, air box and checked the wiring to make sure the loom hadn't chafed on the gearbox or chassis. I checked and cleaned all the connections, fuses and relays in the fuse box next to the air box and reassembled. After a couple of minutes the pump activated again..... Help please.... I'm at a loss of what to check next. |
Oct 22nd, 2018, 09:58 | #2 |
WowIcanwriteAnythingHere!
Last Online: Mar 26th, 2024 16:05
Join Date: May 2016
Location: Dublin/Meath
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Just a shot in the dark here, but maybe a faulty relay ?
I would guess problem originates from CEM sending the signal when it shouldnt, but maybe relay somehow can be a culprit? Im guessing you dont have anyone close by with Vida+Dice?
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Oct 22nd, 2018, 10:44 | #3 |
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Last Online: Aug 8th, 2019 23:34
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Location: Birmingham
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Thank you for the suggestion. I cleaned the relays but didn't try swapping any, I'll try swapping them when I get home tonight.
One thing I still haven't done is to take the ecu(ecm?) Out of the wheel arch and check the connections there. I'll be doing that tonight too. Unfortunately I don't know of anyone with vida dice near me in Birmingham. I might just order one as I will be sticking with Volvo for the family car going forwards (even though have had more than my fair share of problems with this one, I really like how comfortable they are plus the focus on safety) |
Oct 22nd, 2018, 10:50 | #4 |
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Last Online: Aug 8th, 2019 23:34
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Thank you for your help Clan, I did come across a thread last night about pump 'failure' due to this.
I'll pull the bumper off and check for this too. |
Oct 22nd, 2018, 10:51 | #5 | |
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Oct 22nd, 2018, 10:54 | #6 |
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Last Online: Aug 8th, 2019 23:34
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For some reason only lizardofbodom's reply was showing on my phone when I replied first.
I'll definitely be checking on the pump side too tonight. Am I right I thinking that it can only be accessed by taking the bumper off? |
Oct 22nd, 2018, 10:59 | #7 |
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yes best to take the bumper cover off . There is a constant heavy duty power supply going to the pump ..
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Oct 22nd, 2018, 10:44 | #8 | |
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