Speedo Prob on 89 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

89Rebel · 04-14-2002, 08:55 PM

Okay here it is...i had my 89 240SX about 2 years ago and gave it to my sister to drive for a bit...now she is outta school and buying her own vehicle and i am getting the 240 back...but while she had it the digital speedometer stopped working and she just went by the RPMs <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/lookaround.gif" border="0" valign="absmiddle" alt=':look:'> now i took it out for a drive the other day and it seems if though the computer is the core of this problem because the car will also shut itself off anywhere between 3500 and 5000 RPMs while shifting...but it is at a different spot in each gear and everytime you shift (ex could shut down at 3500 in 3rd gear so put the clutch in and let it back out and it will go and then shut off at 4500 or it will go clear up to 5500 without shutting off at all) and when it shuts off it is like it is hittin' the govenor.  Does anyone know any possible problems here or has anyone had this happen to them?  Thanks.

jmancini · 04-14-2002, 11:23 PM

Well, here we go again!  Such a common problem...

OK, its my experience that the culprit is the digital speedometer controller - its a sub-component of the whole cluster and can be removed independently.  It also controls the HUD and the odometer.  I'm not certain about the specifics, but it appears to give feedback to the ECU and causes the RPM cut-off if no speed is registering, ie. speedo failing.  Some people claim that by re-soldering the multitude of joints on the speedo board, the problem will be fixed.  My experience is that won't fix it.  I tinkered with mine for a couple months, tried lots of stuff, but nothing seemed to work.  There are just TOO many things it could be and I couldn't isolate the problem.  I think you can by the speedometer controller unit separately, 'bout $275 from Courtesy Nissan.  I just went to the analog cluster and bagged the HUD and digital display.  Good luck!

04-14-2002, 08:55 PM	#1
89Rebel Join Date: Apr 2002 Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	Okay here it is...i had my 89 240SX about 2 years ago and gave it to my sister to drive for a bit...now she is outta school and buying her own vehicle and i am getting the 240 back...but while she had it the digital speedometer stopped working and she just went by the RPMs <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/lookaround.gif" border="0" valign="absmiddle" alt=':look:'> now i took it out for a drive the other day and it seems if though the computer is the core of this problem because the car will also shut itself off anywhere between 3500 and 5000 RPMs while shifting...but it is at a different spot in each gear and everytime you shift (ex could shut down at 3500 in 3rd gear so put the clutch in and let it back out and it will go and then shut off at 4500 or it will go clear up to 5500 without shutting off at all) and when it shuts off it is like it is hittin' the govenor.  Does anyone know any possible problems here or has anyone had this happen to them?  Thanks.

04-14-2002, 11:23 PM	#2
jmancini Join Date: Mar 2002 Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	Well, here we go again!  Such a common problem... OK, its my experience that the culprit is the digital speedometer controller - its a sub-component of the whole cluster and can be removed independently.  It also controls the HUD and the odometer.  I'm not certain about the specifics, but it appears to give feedback to the ECU and causes the RPM cut-off if no speed is registering, ie. speedo failing.  Some people claim that by re-soldering the multitude of joints on the speedo board, the problem will be fixed.  My experience is that won't fix it.  I tinkered with mine for a couple months, tried lots of stuff, but nothing seemed to work.  There are just TOO many things it could be and I couldn't isolate the problem.  I think you can by the speedometer controller unit separately, 'bout $275 from Courtesy Nissan.  I just went to the analog cluster and bagged the HUD and digital display.  Good luck!