Tire PSI Sensors

Jim, charge them up to 60psi for an hour. Then bring them back down to the correct PSI and drive for 20 minutes after hitting the TPMS button.

The reason is because the batteries charge on centrifugal force. I assume it was not moved in a while.

 

Batteries die on these things. I did not know that they "recharge", but even if they do, the batteries would not last for ever. Might be time for new batteries. Don't know about Enzo's, but many of these are simply replaced, as you cannot change the battery (great designed obsolesence).

 

Jim- There is a different part number for your tire pressure sensors than for my 575M, but I believe they are the same 433 Mhz, Beru RDE 001 sensors. The older Generation 1 sensors last about 5 years or so on Ferraris before the batteries give up the ghost. I have heard nothing about them recharging and am in the process of replacing mine right now. There are new Generation 1.5 sensors (orange vs the gray of the earlier ones) with longer life batteries. Ricambi has the original sensors for your car for about $235. The newer ones are actually cheaper if they work on your wheels. Best idea is probably to give Daniel a call at Ricambi and just change all four sensors. No shelf life issues because they do not activate until they see 25 psi.

http://www.ferrarichat.com/forum/showthread.php?t=225126&highlight=TPMS+sensors

http://www.ferrarichat.com/forum/showthread.php?t=229079&highlight=tpms



Taz
Terry Phillips

 

Jim, that is correct.

If these are your tires currently on the car(that were the spare set) The monitors were changed recently.
The spares came with the 315hZ, which were changed to the 433.So those are new.

Charge them up to 60 psi for an hour. Don't worry they wont pop. Then lower to correct psi and then drive for 20 minutes before it rains today.

 

Diablo- Do you have some tech data for what you are recommending? Tire pressures have nothing to do with centrifugal force or rotational force. Higher tire pressures will allow you to get the system to calibrate by lying to the sensor about tire pressure. If tire pressure should be 32 psi, set 35 psi and perform a calibration. The TPMS sensor will sometimes operate at the higher pressure, but all tire pressures will be three psi lower than the actual pressure once calibrated. This is a good way to check if your sensors are going and you do not have another problem and just need to change the sensors.

Taz
Terry Phillips

 

I don't know where the technical chart is.You could probably google it.
Just know I was told to charge to 60 psi. Some how this jumpstarts the batteries. The pressure difference is then converted and a signal can then be read.
If you use a TPMS reader like one from Tirerack you are told you can read the TPMS monitors when you relieve pressure.

 

Inflating the tires to 60PSI is not going to have any effect on the battery life of the sensors. The sensors do not have rechargeable batteries in them. They have a fixed life span, and start going bad once they are put into use. Look at the parameters page of the TPMS system on the SD2, it will show how much battery life is left in each of the sensors in months.

The latest version sensors from Ferrari/Beru showed a life span of 98 months on the last set that I replaced.

 

Brian- You are right. As I said earlier, raising the pressure will make the sensor work, but not at normal operating tire pressure. Once the pressure is lowered, battery life is unaffected and the sensor is again inoperative. The Gen 1 sensors had a life of 5-7 years and supposedly the Gen 1.5 7-10 years. Your 98 months is in the Gen 1.5 range, and about what I would have expected. Ferraris seem to be on the low end of battery longevity for TPMS sensors.

Taz
Terry Phillips

 

Jim- Glad to hear it worked. Ferrari went to a Generation 2 system during the 2007 model year and that one seems to be more reliable and the sensors last longer.

Taz
Terry Phillips

 

Also now you should be able to put the spare set on and not have to set the monitors up again.