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Hello! My name is Alberto Enrique, i´m interested about design and installation of additional electrical system in vehicles.

I have a Nissan Urvan and designed a Battery Isolator by programing a ATMEGA328P, the idea is to emulate de Battery Isolator function as the comercial solution (150 SUNFORCE BAttery Isolator). We have installed some equipments, and a 5 optima yellow top battery bank. To protect the batteries from a deep discharge operation, i desgined and built a deep discharge module, that opens the DC circuit when the voltaje falls under 10.5 V CD.

Now we have a new challenge, we need to install a second alternator in the vehicle to give 100 Amp @ 12 V CD to a additional system, but we have an 180 A FoMoCo Alternator, the problem is that in this point we have not been able to generate voltage with this alternator because we discovered that it operates with a Power Training Control Module (PCM), we want to emulate this last by programming a microcontroller but we unknow what kind of signal the 3 pin alternator must receive (PWM, serial protocol, levels, frecuency) from the PCM.

Please could anyone help me to find information about the signal that the PCM module gives to the FOMOCO Ford Edge alternator?

Thanks a lot!

Could it be high-side field wire control same as on my 2003 dodge neon?

See http://rusefi.com/forum/viewtopic.php?f=4&t=747
See http://rusefi.com/forum/viewtopic.php?f=4&t=892

Thanks for the information, we have been Reading your post.

In our case, we have a FORD EDGE FoMoCo 180 A Alternator.

http://s2.subirimagenes.com/otros/previo/thump_96418081.jpg


We think that the connections are the next:

http://www.idmsvcs.com/2vmod/alternator/wiring/diagrams/10crownviccharge.jpg


Do you know what kind of signals does the Power Training Control Module gives to the pins 1 (S) and 2 (I) of the regulator alternator?
Maybe some serial protocol? Or maybe some PWM signals? But what is the amplitude? The frecuency?

Our theory is that if we know this signals, we can generate them with a microcontroller, in this way we won´t need the PCM, thank you!

I really doubt it's any kind of digital control, it must be something analog, probably a PWM?

Power Training Control Module. Why Training?!

The term "Power Training Control Module" is defined by FORD, this is essentiall part of the new FORD vehicles.

For some reason google shows very few results for "power training control module" (with quotes) and most mention Jeep Patriot

Here there is more information:

https://en.wikipedia.org/wiki/Powertrain_control_module

PCM = Powertrain Control Module.

Meaning the ECU in Ford speak. Adding an "-ing" to the "train" changes the whole meaning. Similar to forgetting to put the "~" tilda over the "n" in the Spanish word for "years"

Sorry i had a mistake while writing, the correct term is "Power train control module".

Where can i find more information about the signals that the FoMoCo alternator must receive from the PCM?

We need to know about the kind of signal the 3 pin alternator must receive (PWM: amplitude and frecuency or serial protocol).

This alternator will be installed in a Nissan Urvan, so we won´t have the FORD PCM, for that is the reason we need to control the alternator with a microcontroller.
In order to program the microcontroller first we need to know abot this signals.

Next is the image of the 3 pin connnector:

Hi, we could acces in to a Ford Fussion 2010 Alternator, we measured 2 of the 3 pins connector (PCM - Alternator).

We share you the signals screen shoot:





The yellow signal is GEN-COM/GEN-RC (PCM sends it to the alternator to regulate the voltage and current output) (PIN 2)

The green signal is GEN-MON/GEN-LI (alternator sends it to the PCM the feedback the status of the electrical load output) (PIN 1)

We programmed this signals to control a FoMoCo FORD EDGE, but we had not succesful.

Please, could some one bring us information abouut this signals controls?

We figured out that maybe we are not sending an initialization signals
We found:

PIN 2 GEN-COM Signal (PCM to Alternator):
Must a PWM puls train at least every five seconds
PWM 125 HZ must generate 14.00 VCD
PWM 102 HZ must generate 14.70 VCD
PWM 250 HZ must generate 13.00 VCD
But what about the duty cycke?

PIN 3 GEN-MON (Alternator feedback to PCM):
It sends a PWM signal, the duty cycle if this signal is proportional to the elctrical load demand

Thanks!