code 34 again - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

quorton · 08-30-2006, 02:35 PM

I know it has been asked before and I did do a search, but I'm not really sure what to do anymore.

I get a code 34, knock sensor circuit error. I have a 1995 240sx (s14) with an sr20det (european model, but I guess they're not much different).

I did do the following tests and they same fine

The 1st test gives me value of 900+ and the 2nd gives a value of 0, which, I am told, is correct.

A voltage test on the plug (not the ecu side) gives me value of around 3,3v.
I did read this thread and charlie2020 comments http://www.zilvia.net/f/showthread.p...t=knock+sensor where he says it should 5v at the ecu. Would it then also be 5v at the plug ?

If so, could the error be caused because of the 3,3v ? and why ?

ESone3 · 08-31-2006, 08:46 AM

I have also heard that if tighen the KS too tight, it will retard timing. Is should be something like 6 ft lbs er something like that.

quorton · 08-31-2006, 09:39 AM

Never touched it (you cant even see it from the top) since I bought the car 4 years ago.
So I don't think the problem lies with tightening

08-30-2006, 02:35 PM	#1
quorton Join Date: Dec 2004 Location: Netherlands Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	code 34 again I know it has been asked before and I did do a search, but I'm not really sure what to do anymore. I get a code 34, knock sensor circuit error. I have a 1995 240sx (s14) with an sr20det (european model, but I guess they're not much different). I did do the following tests and they same fine The 1st test gives me value of 900+ and the 2nd gives a value of 0, which, I am told, is correct. A voltage test on the plug (not the ecu side) gives me value of around 3,3v. I did read this thread and charlie2020 comments http://www.zilvia.net/f/showthread.p...t=knock+sensor where he says it should 5v at the ecu. Would it then also be 5v at the plug ? If so, could the error be caused because of the 3,3v ? and why ? __________________ http://www.cardomain.com/id/quorton

08-31-2006, 08:46 AM	#2
ESone3 Zilvia.net Advertiser Join Date: Oct 2005 Location: Chicago Posts: 1,376 Trader Rating: (15) Feedback Score: 15 reviews	I have also heard that if tighen the KS too tight, it will retard timing. Is should be something like 6 ft lbs er something like that. __________________ www.illgarage.com

08-31-2006, 09:39 AM	#3
quorton Join Date: Dec 2004 Location: Netherlands Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	Never touched it (you cant even see it from the top) since I bought the car 4 years ago. So I don't think the problem lies with tightening __________________ http://www.cardomain.com/id/quorton