PWM Control of GM Alternators

[Tre-Cool]

my c6 tends always run at 14.5v, very rarely see it under 13v.

[MPC001]

my c6 tends always run at 14.5v, very rarely see it under 13v.

Thanks for the feedback. Interesting & appreciated.

[Knackersjewels]

I have a pwm alternator on one of my LS vehicles, using P59. Couldn't get it natively controlling it properly, so bought a cheap pulse width controller. 128hz, 92% duty gets around 14.8v from the scanner, and on the gauge, if unplugged, it defaults to 13.5v

[MPC001]

I have a pwm alternator on one of my LS vehicles, using P59. Couldn't get it natively controlling it properly, so bought a cheap pulse width controller. 128hz, 92% duty gets around 14.8v from the scanner, and on the gauge, if unplugged, it defaults to 13.5v

Great feedback thankyou. Is the alternator a regular Holden Mitsubishi unit? (140A IIRC?)

[Knackersjewels]

I believe so, genuine Mitsubishi part to suit VZ 6 litre

[MPC001]

same. Thank you

I believe so, genuine Mitsubishi part to suit VZ 6 litre

[V8fan]

I have a pwm alternator on one of my LS vehicles, using P59. Couldn't get it natively controlling it properly, so bought a cheap pulse width controller. 128hz, 92% duty gets around 14.8v from the scanner, and on the gauge, if unplugged, it defaults to 13.5v

I use DR44 from escalade 2011 with 2 pins voltage reg originally
Without signal it produce 13.6 and as I read -its failsafe voltage
Because I havent wires in my wiring harness from PCM to alternator - I simply change voltage regulator to older model (-2007 4 pins) that can work without any signal and can light warning lamp directly into cluster
It will be interesting to make custom controller to control not only voltage but enable current protection (I have OEM current sensor that has output as frequency)
My plan is to use LTO battery but I wanna add overload protection to alt

[Tre-Cool]

not sure if you find this helpful or not.

Just converted a vz 6lt crewman to a 2010 6l80e. Both following combo's require EVC generator options to be turned off otherwise voltage sits at 11.5v. (I just used the same parameters from the 2006 ecu into the newer units)

VF-Alternator-Charging.png

2011 VE ecu os 12659270 & tcm-24256125, then went to VF-OS - 12656930 & TCM-24267577

I can mix-match tcm os with the either ecu code.

[MPC001]

not sure if you find this helpful or not.

Just converted a vz 6lt crewman to a 2010 6l80e. Both following combo's require EVC generator options to be turned off otherwise voltage sits at 11.5v. (I just used the same parameters from the 2006 ecu into the newer units)
VF-Alternator-Charging.png

2011 VE ecu os 12659270 & tcm-24256125, then went to VF-OS - 12656930 & TCM-24267577

I can mix-match tcm os with the either ecu code.

Thanks for the share Tre-Cool! Did the last two items need changing as well to disable RVC? G1006/7?

On the ECM TCM OS interworking, I must put some effort into getting C6 12628990 or 12635863 or 12639270 running properly with 24243170 when i get a chance.
Have had 12628990 running but shifts & idle a bit off. I have a gold blade TB to go in now, maybe that was why >> more playing.

[MPC001]

Very cool !

Just converted a vz 6lt crewman to a 2010 6l80e.