M-Drive and MDM in non M cars

RSL

Lieutenant
Aug 11, 2017
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@aus335iguy sport button should do everything without fail, just limits to 2 states/modes.

@Olza definitely grandma or race car when I had the button and P5 set for sport. Everyone is different, but I think P2 or 3 for sport off and 5-6 for sport on would've been fine with me. Sport off was just way too dull for normal daily and sport on was too much.

I was surprised to see it active too. No indicators for it, but if there's even a small difference between high/low request tables, it's obvious just driving. The logs just confirmed what I was feeling. I did a quick CAN log in the garage this afternoon to see if I can spot anything.
 
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RSL

Lieutenant
Aug 11, 2017
695
377
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Manual mode from shifter or paddle activates RNG_L on M3 GWS/bin. Still not sure exactly what triggers it, but so far, 0x1A2 B6 and either low 4 or b2-3 specifically, seem a possible source (0hC1 = D, 0hC5 = M). Other option may be the actual ETCU program itself, but I still haven't quite got the gist of how M3 bin translates it.

Green is RNG_L (0/1), red is gear (0/1/2), purple is ETCU_prog (8 = D, 2 = M). Just start->shifter right for D 1st from P->shifter right again for M 1st (low on)->shifter right for back to D1 (low off), paddle up for M 2nd (low on)->back to D 1st-N->car off.

gws_rng_l.png
 

RSL

Lieutenant
Aug 11, 2017
695
377
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One more small note on the D versus M toggling RNG_L with the M3 shifter: with SZL disabled in the DME, it toggles RNG_L and B_sport. With the SZL enabled in the DME (but M Drive not on), it only toggles RNG_L, not B_sport.

I got spirited on in all D levels and noticed no changes. If it's related to accel position or gradient, MSD81 requests may make it too low to activate anything related unless you're really flogging it.
 

amg6975

Corporal
Oct 27, 2019
235
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Ride
2012 135, 2005 ZHP, 2009 fJCW
The N55 M2 didnt have drivelogic and only had driving “modes” similar to the z4is



View attachment 48786

The new BMW M2 can be ordered as an option with the latest generation of the seven-speed M Double Clutch Transmissions (M DCT with Drivelogic). This system, which effectively combines two gearboxes, each with its own clutch, is specially designed to work with the customary engine dynamics of M cars and the engine’s high torque and output. Depending on the driving mode activated, it enables either extremely fast gear changes with no interruption in the flow of power or ultra-smooth shifts. The extra gear of the M DCT transmission over the six-speed manual gearbox allows very small increases in rpm between gear changes when accelerating and reduces fuel consumption thanks to its longer gear ratios.
Moving between the transmission’s manual modes alters the shift dynamics, but it is the driver who determines the timing of a gear change. The system detects which gear the driver will choose next on the basis of the engine’s revs, the accelerator position, the level of acceleration and the driving mode, and engages it before the driver has actually moved the shift paddle. As a result, the clutches now only need to open or close for the gear-change process to be completed. The change of gear is therefore executed in fractions of a second and enhances the dynamic driving experience in a very palpable way.
This will use 0x315 like the Z4. This is not useful for this conversation.
 
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