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

Rittmeister · 10-25-2003, 11:32 AM

OK guys, I've got a problem. 1990 Ka24E.

I have the infamous non-functioning HUD problem, HOWEVER I also had NO lights in the dash cluster. The lights in the radio/HVAC controls worked, but the only thing working in the gauge cluster was the tach. The odometer didn't work either.

Fast forward to today. I got a spare cluster and HUD from another S13. I put it in before realizing that it was from a DOHC car, so the tach doesn't work. My own fault, however the HUD and speedo on the new cluster also aren't working. My question is this: are the speedometers also different between SOHC and DOHC cars? Or is there a speed sensor or something that is either bad or is different between the engines? The backlighting is working now, so that's OK. Don't know if the new odo works, I don't want to drive it until it's put back together.

To sum up: neither HUD nor speedo are working. Everything else is, except for the tach, which I know how to deal with.

I really need help. My dash is all over the passenger floor right now until I get this resolved.

Rittmeister · 10-25-2003, 10:54 PM

OK seriously, what do I have to do to get someone to look at this post? My car is in pieces, I have a simple question that searching has not answered, and I need help. Basic question: is there a difference between SOHC and DOHC speedometers, OR will the speedometer simply not light up if the speed sensor is bad?

TIA

nrcooled · 10-26-2003, 07:32 AM

You need the speed sensor for the DOHC.

Rittmeister · 10-26-2003, 07:37 AM

So you're telling me the speed sensors are different? If the sensor was bad, would the speedo just read zero, and since it's the wrong sensor it's blank?

Rittmeister · 10-26-2003, 08:11 PM

Does anyone have any more info for me, suggestions or opinions, before I start buying parts at random to see what happens?

nrcooled · 10-28-2003, 07:59 AM

Do you have any friends with 240s. Grab a DOHC speed sensor and do a swap to see if it works.

I understand your position considering that electrical items can't be returned but I am almost positive that the SOHC speed sensor will not work with a DOHC cluster.

Edit: After reading your post again what about the HUD wasn't working? Just the HUD or the speedo on the cluster also? The tach on the DOHC cluster won't read a SOHC signal and the speed sensor won't show without the DOHC speed sensor.

My suggestion: Get a FSM and a voltometer and get to work!

sorry I can't be more help but that is exactly what I would do in your positon

10-25-2003, 11:32 AM	#1
Rittmeister Zilvia FREAK! Join Date: Jan 2003 Location: Cincinnati OH Age: 48 Posts: 1,033 Trader Rating: (9) Feedback Score: 9 reviews	Speedo question OK guys, I've got a problem. 1990 Ka24E. I have the infamous non-functioning HUD problem, HOWEVER I also had NO lights in the dash cluster. The lights in the radio/HVAC controls worked, but the only thing working in the gauge cluster was the tach. The odometer didn't work either. Fast forward to today. I got a spare cluster and HUD from another S13. I put it in before realizing that it was from a DOHC car, so the tach doesn't work. My own fault, however the HUD and speedo on the new cluster also aren't working. My question is this: are the speedometers also different between SOHC and DOHC cars? Or is there a speed sensor or something that is either bad or is different between the engines? The backlighting is working now, so that's OK. Don't know if the new odo works, I don't want to drive it until it's put back together. To sum up: neither HUD nor speedo are working. Everything else is, except for the tach, which I know how to deal with. I really need help. My dash is all over the passenger floor right now until I get this resolved. __________________ E36 M3 - new project 1990 240SR - screamed down the road

10-26-2003, 07:32 AM	#3
nrcooled Nissanaholic! Join Date: Mar 2002 Location: Turn 8 'bout to get rolled by a SC'd ITR Age: 46 Posts: 1,849 Trader Rating: (0) Feedback Score: 0 reviews	You need the speed sensor for the DOHC. __________________ '91 hatch w/ SR Sold; '03 Evo Sold 401 HP; '03 MS Protege sold; '00 Evo 6.5 TME Sold 300HP

10-26-2003, 08:11 PM	#5
Rittmeister Zilvia FREAK! Join Date: Jan 2003 Location: Cincinnati OH Age: 48 Posts: 1,033 Trader Rating: (9) Feedback Score: 9 reviews	One more try... Does anyone have any more info for me, suggestions or opinions, before I start buying parts at random to see what happens?

10-28-2003, 07:59 AM	#6
nrcooled Nissanaholic! Join Date: Mar 2002 Location: Turn 8 'bout to get rolled by a SC'd ITR Age: 46 Posts: 1,849 Trader Rating: (0) Feedback Score: 0 reviews	Do you have any friends with 240s. Grab a DOHC speed sensor and do a swap to see if it works. I understand your position considering that electrical items can't be returned but I am almost positive that the SOHC speed sensor will not work with a DOHC cluster. Edit: After reading your post again what about the HUD wasn't working? Just the HUD or the speedo on the cluster also? The tach on the DOHC cluster won't read a SOHC signal and the speed sensor won't show without the DOHC speed sensor. My suggestion: Get a FSM and a voltometer and get to work! sorry I can't be more help but that is exactly what I would do in your positon __________________ '91 hatch w/ SR Sold; '03 Evo Sold 401 HP; '03 MS Protege sold; '00 Evo 6.5 TME Sold 300HP

10-25-2003, 10:54 PM	#2
Rittmeister Zilvia FREAK! Join Date: Jan 2003 Location: Cincinnati OH Age: 48 Posts: 1,033 Trader Rating: (9) Feedback Score: 9 reviews	OK seriously, what do I have to do to get someone to look at this post? My car is in pieces, I have a simple question that searching has not answered, and I need help. Basic question: is there a difference between SOHC and DOHC speedometers, OR will the speedometer simply not light up if the speed sensor is bad? TIA

10-26-2003, 07:37 AM	#4
Rittmeister Zilvia FREAK! Join Date: Jan 2003 Location: Cincinnati OH Age: 48 Posts: 1,033 Trader Rating: (9) Feedback Score: 9 reviews	So you're telling me the speed sensors are different? If the sensor was bad, would the speedo just read zero, and since it's the wrong sensor it's blank?