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K12 Tuning & Mechanical
EPS Power steering column, what ACTUALLY goes wrong?
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<blockquote data-quote="Kevin Meneely" data-source="post: 741133" data-attributes="member: 25996"><p>Hi Datman, Hi Plmval,</p><p></p><p>I have just been asking myself the same question. The PS light came on yesterday on my 2004 K12 for the first time. I drove it to work with no PS, but restarted it when I got there and the fault cleared itself and has been OK today, but I fear it will be back eventually. My Wife and I have owned it from new and its done 55K.</p><p>There is much written on the web about this subject, but I haven't found anything yet to say EXACTLY what goes wrong. If I knew this I recon I could repair these all day long <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite13" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>I'm an electronic engineer with some experience with designing switches and electronics for cars (Lotus, Morgan, Elemental) and some CAN bus controls for Plant machinery (Niftylift).</p><p>From what I can tell, a brand new column from Nissan will fit straight on any car. Once it has been fitted it becomes coded to that car so you cannot just buy one from a scrap yard and swap it. It is possible to reprogram the EEPROM in a secondhand unit to make it 'virgin' again, provided you can find and download the program from somewhere.</p><p>But what actually goes wrong with the unit? If its a problem with the electronics I would suspect it is a problem with a failed solder joint somewhere, possibly on the MOSFET transistors that drive the motor. Otherwise I would suspect it is a problem with the actual motor.</p><p>I'm hoping it would be a case of re-soldering some components in the electronics then resetting the fault code(s).</p><p>I'm not going to take my unit apart yet as it has not failed permanently. If it starts to fail more frequently I will take a look.</p><p></p><p>If anyone has any new information on this subject it would be much appreciated. Obviously is IS possible to repair this common fault as there are a couple of companies out there doing it already (for a price).</p><p></p><p></p><p>Update 03/11/16 - just bought an N607 fault code reader as recommended be member 'superben' <a href="https://www.micra.org.uk/threads/nissan-micra-eps-issue.66286/" target="_blank">https://www.micra.org.uk/threads/nissan-micra-eps-issue.66286/</a></p><p></p><p>Been driving around for a few month now with no pas - pumped biceps but MOT is looming so need to fix it now <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite13" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Kevin Meneely, post: 741133, member: 25996"] Hi Datman, Hi Plmval, I have just been asking myself the same question. The PS light came on yesterday on my 2004 K12 for the first time. I drove it to work with no PS, but restarted it when I got there and the fault cleared itself and has been OK today, but I fear it will be back eventually. My Wife and I have owned it from new and its done 55K. There is much written on the web about this subject, but I haven't found anything yet to say EXACTLY what goes wrong. If I knew this I recon I could repair these all day long :) I'm an electronic engineer with some experience with designing switches and electronics for cars (Lotus, Morgan, Elemental) and some CAN bus controls for Plant machinery (Niftylift). From what I can tell, a brand new column from Nissan will fit straight on any car. Once it has been fitted it becomes coded to that car so you cannot just buy one from a scrap yard and swap it. It is possible to reprogram the EEPROM in a secondhand unit to make it 'virgin' again, provided you can find and download the program from somewhere. But what actually goes wrong with the unit? If its a problem with the electronics I would suspect it is a problem with a failed solder joint somewhere, possibly on the MOSFET transistors that drive the motor. Otherwise I would suspect it is a problem with the actual motor. I'm hoping it would be a case of re-soldering some components in the electronics then resetting the fault code(s). I'm not going to take my unit apart yet as it has not failed permanently. If it starts to fail more frequently I will take a look. If anyone has any new information on this subject it would be much appreciated. Obviously is IS possible to repair this common fault as there are a couple of companies out there doing it already (for a price). Update 03/11/16 - just bought an N607 fault code reader as recommended be member 'superben' [URL]https://www.micra.org.uk/threads/nissan-micra-eps-issue.66286/[/URL] Been driving around for a few month now with no pas - pumped biceps but MOT is looming so need to fix it now :) [/QUOTE]
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EPS Power steering column, what ACTUALLY goes wrong?
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