lsvtec

iTrader: (7)

My 2007 gs350 is acting up lately, I was on freeway doing around 70mph but speed needle only pointed at 40mph on the gause. Could it be speed sensor?

isfdude

iTrader: (11)

A bad speed sensor would give you an engine light. It might be the gauge cluster itself. When you first turn the car on and it does the self test does it go all the was to max speed then go down to normal?

gvu20

i dont think 3GS does a test, it just goes to whatever speed/rpm the car is at.

isfdude

iTrader: (11)

Ok I see what you mean after watching a video. If you have access to a good scanner you can see if the car will read past 40 mph. I did some research and it could be either output speed sensor, abs sensors one or more or the cluster itself.

lsvtec

iTrader: (7)

No, the self test doesn't go all the way.

TRD_Power

Sounds like a good excuse out of a ticket to me

isfdude

iTrader: (11)

The police don't care these days. Lol

TaninAuto

Hi, Tanin Auto here. If you would like to send the cluster in to us, we can run a diagnostic on it to see if it is repairable. If it is not, we do also help locate a new cluster and program the correct miles for you. The link to the Gauge cluster and speedometer diagnostics service is here:

http://www.taninautoelectronix.com/G...uster_diag.htm

Let us know if you have any other questions at all. We are always happy to help in any way we can!

isfdude

iTrader: (11)

Do you guys also fix the led on the needle problem with the ISF clusters?

TaninAuto

Yes, we can repair the lighting in the needles for you. Let us know if we can help you out at all.

Thanks,