[Bender Rodríguez]

So does anyone know what sensor the ecu uses to determine the vehicles speed. Looking at the diagram at first I though it was the ABS wheel speed sensors but that doesn't appear to be the case. Currently I think I have whatever sensor it is unplugged and the tach now cuts out the second I go above 2500rpm. Any help would be awesome.

 

[apk919]

I'm confused by your problem... if it's a tach problem the ECU get it's RPM information from the crank sensor, so speed sensors have nothing to do with it.

 

[MaineLotus]

Speedo uses the wheel speed sensors, also shared by ABS.

 

[Bender Rodríguez]

Ok it wheel speed sensor unplugged. Fixed both issues.

Thanks for the help

 

[Bender Rodríguez]

Ok so the tach is still cutting out the second I go above 3k rpm's. and when I did back below it kicks back in immediately. Any ideas???

 

[speedycar]

Warranty?

The same thing happened to mine within the first year. The dealer replaced the whole instrument cluster. Problem solved.

 

[Bender Rodríguez]

The same thing happened to mine within the first year. The dealer replaced the whole instrument cluster. Problem solved.

Sadly no, outside of the ecu I'm not sure what it could be.

Any ideas?

 

[Bender Rodríguez]

Ok so I'm still having an issue with the Tach cutting out. Anyone have any ideas???

 

[Bender Rodríguez]

So the spedo is fixed but I'm really stumped on the tach issue. :sad:

Basically anything over 3100rpms and the the gage drops to 0. Under 3100 it reads accurate after that nothing when i speed up it stays at zero and then when i slow down where the rpm comes back into that range it starts working again. If I'm understanding it correctly it has to be the ECU or the cluster, any help would be greatly appreciated.
:ST:

 

[Shawn C]

Did you find a fix?

 

[JBH]

Tach dies at RPM

I've had my '08 Exige (1500 mi.) do this twice. Didn't seem to relate to anything else I was doing. Turned the car off and restarted and the tach worked fine. Dealer hasn't found a bug yet.

 

[SirLotus]

Possibly, not generally known, is that beyond the factory 3 year, 36,000 mile warranty, is the "Emissions" warranty.
If you are fortunate enough to have your car registered in either California, New Jersey, Connecticut, Oregon, Washington, Rhode Island, New York, Maine, Massachusetts, Pennsylvania, New Mexico, Florida or Colorado, there is a CARB, 7 year/70,000mile warranty on amongst other things the Instrument Pack.
Cheers,
Michael