PCM controlled charge voltage

[RD_Atlanta]

It appears the desired Commanded Duty Cycle PWM % is a tunable parameter on some PCMs while not on others. Does anyone know if there is a way to adjust the charge output voltage on the PCM OS's where this commanded duty cycle % is not accessible & adjustable?

Commanded Duty Cycle Generator Output Voltage:

10% 11.00 V
20% 11.56 V
30% 12.12 V
40% 12.68 V
50% 13.25 V
60% 13.81 V
70% 14.37 V
80% 14.94 V
90% 15.50 V

 

[ulycyc]

You need to check with companies that make reprogramming software but I doubt it will on a 2005 Lesabre. The Corvette and "V" option Caddie's pcm's have most if not all parameters adjustable.

 

[RD_Atlanta]

You need to check with companies that make reprogramming software but I doubt it will on a 2005 Lesabre. The Corvette and "V" option Caddie's pcm's have most if not all parameters adjustable.

I have several software packages but they are limited to what the PCM OS supports. I was hoping there might be an alternative method. It's a mystery why all of the PCM OSes do not support adjusting the alternator PWM.

 

[ulycyc]

They do make stand alone volt booster/trimmers that go inline at the alternator and controlled by the TPS. I know Caspers electronics make a few.

 

[RD_Atlanta]

They do make stand alone volt booster/trimmers that go inline at the alternator and controlled by the TPS. I know Caspers electronics make a few.

Thanks.