A

ab16

New Member
I have just purchased a 4.6 Petrol Vogue, 2001, which I have had converted to LPG.
The battery keeps going flat. Obvious things have been checked - battery, alternator, lights / equipment on etc.

The battery, which was new on the vehicle, is 70 amp hr charge and correct spec for the petrol version but I noticed the handbook that the diesal has a 107 amp hr charge.

As the vehicle has now been converted to LPG, is this battery too small/low capacity for the LPG conversion and should I get a different battery?

Any advice, experiences etc appreciated.
 
i have a 4.0 96 and i use a 120 ah battery!!! and i'm thinking of putting a second on there, i would consider a 70 ah too small for primary cranking power, get a better one!!!

also read up about the alarm system and stray radio signals.

dunno if it affects the 2001 but it used to be a big problem!
 
if your doing lots of short trips, using lights,AC, tunes etc the poor ickle battery isn't going to be getting enough charge to recover
 
ah, the diode pack if it's ted, is another thing that robs ya battery.

Also, alternators never fully condition a battery, only proper way to bring battery upto full capacity is with a charger, battery will last a lot longer also. Seeing as your battery is borderline amperage you may have taken it past a point of no return too many times so it will never fully recover no matter what.
 
Hi

i was having this problem on my p38, i found out that one of the main ecu's operates on a particular frequency which i cannot find. well this frequency is used by some household items. if you sit in the vehicle wen it is locked with the key (superlocked) after a few minutes you will here the computer power down. when this computer is shut down it draws 0.2 amps. well if you stay in the vehicle long enough as boring as it seems. you can hear the computer power bak up. this only happens if it is ativated by something on the same frequency. if im not mistaken you can take it to land rover and have the computer set up differently so that this doesnt happen. as it is now mine will go 4 weeks without the battery losing its charge. i will try and find out wat ecu it is to look for and i will get bak... hope this helps

stu
 
I think you're talking about the RF receiver.

This was picked up by Land rover in 2002.

The old receiver operates on the 400mhz frequency. The same frequency as broadband, blue etc etc. In 1994 when these RF receivers were designed the wireless networks wasn't a problem then but in 2002 Landrover address the issue by updating the RF receiver to operate in the 800mhz frequency which addressed the problem.

The updated receiver number is 500170.
 
Rick-the-Pick said:
I think you're talking about the RF receiver.

This was picked up by Land rover in 2002.

The old receiver operates on the 400mhz frequency. The same frequency as broadband, blue etc etc. In 1994 when these RF receivers were designed the wireless networks wasn't a problem then but in 2002 Landrover address the issue by updating the RF receiver to operate in the 800mhz frequency which addressed the problem.

The updated receiver number is 500170.
Click to expand...

Just stumbled upon this while researching batteries...

If LR changed the frequency or the RF receiver, then how do the existing key fobs still work or am I just being dim?

Guy
 
Rick-the-Pick said:
You're just being Dim.
Click to expand...

A 400Mhz transmitter will not operate a 800Mhz receiver, if it did it would be illegal. If Land Rover changed the frequency of the receiver they would have had to issue new fobs with a replacement receiver. They may have changed the frequency on the production line, but I don't think so. I pretty sure what they did was make the receiver operate over a narower frequency range within the 400Mhz band and improve it's rejection of spurious signals. There are loads of 400Mhz transmitter receiver combo's for the developer that don't suffer the problems with spurious signals that the P38 receiver suffered from.
 
Datatek said:
A 400Mhz transmitter will not operate a 800Mhz receiver, if it did it would be illegal. If Land Rover changed the frequency of the receiver they would have had to issue new fobs with a replacement receiver. They may have changed the frequency on the production line, but I don't think so. I pretty sure what they did was make the receiver operate over a narower frequency range within the 400Mhz band and improve it's rejection of spurious signals. There are loads of 400Mhz transmitter receiver combo's for the developer that don't suffer the problems with spurious signals that the P38 receiver suffered from.
Click to expand...

That's what I thought when I asked in the first place. Can I pull the plug on my bath of dimness now?
 
The Receiver operates in the unlicenced 400mhz range.

The later receiver operates in the 800mhz frequency.

The reason why the fobs still work is because they operate a rolling code signal.
 
Yeah but....
A rolling code signal is not the same as changing the frequency. As Datatek says, a 400MHz fob would not operate a 800MHz receiver. They've basically tightened up the tolerances. They still operate in the 400MHz band.
 
As Derek Ward say's, the rolling code has nothing to do with transmission frequency. The rolling code is basically the digital signature of the FOB which has to match the BECM code. The rolling code is, like any transmission, superimposed on the transmission frequency either by frequency modulation or pulse code modulation.
The early receivers were crap design in that they received too many of the 400Mhz band frequencies. The newer receiver simply has a narrower band of frequencies to which it will respond.
 
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