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V6 Terrano rev counter issue
Posted: Tue Sep 11, 2012 6:16 pm
by hamboy
Hey guys my old mans V6 terrano ha picked up a bit of an electical gremlin. The rev counter swings wildly, stops compleatly then starts working fine. Does anyone know where the problem would be?
Any ideas are much appreciated
Cheers
Re: V6 Terrano rev counter issue
Posted: Tue Sep 11, 2012 6:31 pm
by slide
Might be easiest to try a S/h cluster and see if that fixes problem. Much easier than tracing circuits and checking voltages/pulses...
Re: V6 Terrano rev counter issue
Posted: Tue Sep 11, 2012 8:44 pm
by icekayak
Haven't working it out yet but my td27 does the same thing...
Re: V6 Terrano rev counter issue
Posted: Tue Sep 11, 2012 8:49 pm
by DEATH_INC
icekayak wrote:Haven't working it out yet but my td27 does the same thing...
Yep, mine too.
Re: V6 Terrano rev counter issue
Posted: Fri Sep 14, 2012 9:04 pm
by wax
Bent needle does it.
Re: V6 Terrano rev counter issue
Posted: Mon Sep 17, 2012 4:33 pm
by hamboy
wax wrote:Bent needle does it.
Nah its not bent needle syndrome this time
Re: V6 Terrano rev counter issue
Posted: Sun Oct 14, 2012 7:05 pm
by icekayak
Have talked to a few people and did a bit of research and found out these suffer from dry joints in the solder.
Found this site
http://www.gtr.co.uk/forum/151359-crazy-rev-counter-fixed-guide.html, mine was quite different in construction, but gives an idea of what you are looking for. (I only resoldered the big joints, 1 of the legs of the ic, and one of the legs of the resistor, basically anything that looked possibly slightly dodgy)
Put it back in and it works perfectly (for now anyway).
The one catch is I had to pull the needle off to get to the circuit board with the soldering iron so now its out of calibration...
Re: V6 Terrano rev counter issue
Posted: Sun Oct 14, 2012 7:53 pm
by slide
Easy way (rough way
) to recalibrate is to leave plastic trim off, remove needle, then refit needle carefully while engine is idling. Put needle to point to what rpm it used to idle at (eg put at 800, if it idles at 800 rpm)
Gets it close enough that no-one else would know the difference.
Cheers for the link, could well come in handy
Re: V6 Terrano rev counter issue
Posted: Sun Oct 14, 2012 9:10 pm
by hamboy
slide wrote:Easy way (rough way
) to recalibrate is to leave plastic trim off, remove needle, then refit needle carefully while engine is idling. Put needle to point to what rpm it used to idle at (eg put at 800, if it idles at 800 rpm)
Gets it close enough that no-one else would know the difference.
Cheers for the link, could well come in handy
Been there, done that, but with the speedo and a navman. Cheers icekayak for the link sounds like a rainy day job
Re: V6 Terrano rev counter issue
Posted: Mon Oct 15, 2012 6:30 am
by icekayak
slide wrote:Easy way (rough way
) to recalibrate is to leave plastic trim off, remove needle, then refit needle carefully while engine is idling. Put needle to point to what rpm it used to idle at (eg put at 800, if it idles at 800 rpm)
Gets it close enough that no-one else would know the difference.
Cheers for the link, could well come in handy
Yep thats what I did, though it hasn't been working that long I have no idea what it is idling at but just put it back on at 750rpm which should be around there somewhere (diesel).
Whole thing was under an hour from start to finish, but maybe I just got lucky picking the correct pins to resolder.