Deleting factory fan?
- Thread starter DetailsUnlimited
- Start date
then whats this table for? just wondering it seems like it applies progressive voltage to slowly engage the clutch.
The LBZ's and LMM's have the exact same viscous clutch as the LB7's and LLY's. Its not electronically controlled or electronically monitored.
HP Tuners has a lot left to be desired with duramax tuning. Who knows what that fan control table "actually" does, but I can tell you it doesnt control any fans.
The LBZ's and LMM's have the exact same viscous clutch as the LB7's and LLY's. Its not electronically controlled or electronically monitored.
HP Tuners has a lot left to be desired with duramax tuning. Who knows what that fan control table "actually" does, but I can tell you it doesnt control any fans.
ok from reading around, it looks like it may have suppose to have been there but gm didn't go through with it. so my next question is, does anybody know what pin in the pcm that table controls. if so and if its active then you can use that to control electric fans. like my tahoe, it didn't come with electric fans. but the pcm has the ability to control them. so you pin the correct spots and activate it in the tune and voila you have electric fan control. no need for controller that stick in the radiator.
but you are right the fan itself is not electric in any way.
Just because HPT has it in there doesnt mean its "right". They also have stuff in the TCM tunes labeled "line pressure", even though the allison doesnt have any form of electronically controlled line pressure.
Unlike the LS1 ECM in your tahoe, the bosch EDC16 on the LBZ wasnt used in any other applications, so there is no way to find out what pins would control an electric fan, if they even exist at all.
ben
05 trailerblazers use a thermo-electric fan as well but no dmax uses them. I see no provisions in efi live for the electric fan on a lbz.
oh you mean it doesnt go WHOOOOAAHHHHHHHHHHHHHHHHHHHHUUUHHHHHHHHHHHHHHHHH for the first 2 minutes of driving when you start it up cold in the morning?
No, it's all new. I do seem to remember there being a fan control table in EFILive when it first came out, but I can't find it now. I wouldn't be surprised if the ECM has the capability to control an electronic fan clutch.
oh you mean it doesnt go WHOOOOAAHHHHHHHHHHHHHHHHHHHHUUUHHHHHHHHHHHHHHHHH for the first 2 minutes of driving when you start it up cold in the morning?
And what causes it to do that anway? I've always wondered why mine is engaged in the mornings even when its 20 deg outside?
Mine does the same thing. I figured that the fluid was just to thick in that cold of weather to let the fan spin freely. But, as General said, it doesn't ALWAYS do it.
EFI Live has Fan control in the DVT controls as well. However it is not able to control a mechanically, non electronic fan we have in the dmax
LBZ/LMM uses a Bosch EDC-16c controller. LML uses a Bosch EDC-17
They are quite different unfortunately.
A bit late to the discussion...
Still goining strong. And, still hauling my 37' toyhauler.
thats good to know i found: Engine Control Module (ECM): LMM 6.6L Diesel – Connector X-1 (continued)
Pin Wire Color Circuit No. Function
28 0.5 WH/BK 2366 Cooling Fan Clutch Control
i couldn't find a lbz pinout.
IIRC the medium-duty-only LMM's had an electronically controlled clutch. It was a PWM signal, not an "on/off" signal.