Thread: Battery Charging voltage

Hi again Mark and just a tip.

Make sure nothing is connected to the NEGATIVE ( - ) terminal of your cranking battery, other than the D4's earth lead.

Doing so can cause all sorts of seemingly unrelated issues.

If you need to earth anything, there are two 6M studs in the inner guard, just in front of the cranking battery compartment.

Here is a picture of the studs, just ignore the EARTH PLATE info.

Originally Posted by PeterOZ

My d3 charges at over 14v @ about 2500RPM

What voltage is on battery with connectors removed?

What voltage at idle & at say 2500 RPM

a diode will not increase your charge voltage, that is not how they work. Diode will conduct current in one direction only, dropping around 0.6V in the process for a Si or 0.2v for a Ga diode. In AC circuits they can be used as a rectifier.

All do is drop 0.6v and isolate a 2nd battery if you have it wired that way.

By the sound of it the way you had it you would have drecreased voltage by 0.6V, not increased.

Peter, they use the diode for its voltage drop in a hilux prado circuit to confuse the ecm that the voltage is lower. so it compensates and charges the battery at 13.6 in stead of the 13.3 charge rate the factory has the ecm set at