This guide covers the factory launch control. For information on the RaceROM Launch Control refer to GT-R RaceROM Launch Control, Rolling Launch and BOTL |
When the Engine and Gearbox oils are up to temperature, the vehicle is stationary and the correct settings are applied to the 4WD and VDC switches along with Manual Gear Selection (not in Auto) then the factory Launch Control can be used (assuming the factory TCM ROM has it enabled by Nissan, see NOTE below!).
With your left foot on the brake and quickly pressing the Accel pedal to the floor, the engine RPM will rise very quickly to around 3300rpm or 4500rpm (depending on the exact LC version installed), this RPM will be held for around 5 seconds until the ECU will force release of the LC mode to prevent strain and heat on the clutches and gearbox.
If the 4WD switch is simply moved out of RACE mode and the test repeated then LC mode will not enable and the difference is clearly felt.
LC2 and some LC3 ROMs have the factory LC mode disabled in the TCM ROM, this can be enabled using ProECU. |
On later JF cars Nissan simply disabled the launch control in the TCM ROM, this was sometimes applied during servicing at Nissan dealerships and it’s claimed that the launch control functionality was removed to maintain manufactures warranty.
You can see below the LC2 TCM ROM called JF09DBA has the factory Launch Control disabled by Nissan, to re-enable simply check the box, save the ROM and program into the TCM ECU. This will enable the LC1 Launch Control code again in the LC2 ROM
LC1 and LC2 can only be used with VDC OFF and in Manual – R mode and conditions must be met as described above. |
2010-2011 Gen 1 GTR models have a revised Factory Launch Control system which is enabled on all JW models. LC3 is a less aggressive Launch Control strategy that is easier on the transmission and drivetrain. LC3 works with VDC ON (Traction Control working).
If you wish to allow LC to work in other conditions (like Auto or without VDC etc) then simply enable the condition in the TCM ROM (though the associated risks must be accepted).
LC should be enabled in BOTH Mode A and Mode B if used with any Gen 1 GTR models. |
2011 Gen 2 GTR models have more refined gearbox control code, along with more advanced Launch Control strategy with improved clutch control, faster gear selection and much smoother gear changes compared to earlier TCM code versions.
If you wish to allow LC to work in other conditions (like Auto or without VDC etc) then simply enable the condition in the TCM ROM (though the associated risks must be accepted).
: LC should be enabled in BOTH Mode A and Mode B if used with any Gen 1 GTR models. |
Map List
JF Series TCM (LC1)
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JW Series TCM (LC3)
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KB, KJ, 38 Series TCM (LC4 - 5)
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EcuTek ProECU Nissan GTR TCM software allows the tuner to modify the LC setting conditions so that launch control can be activated without R-mode, or with VDC off or however you want. |
EcuTek ProECU tuning tools tools should only be used by experienced tuners who understand the product and engine calibration.
Retail customers ** If you have any doubt that you do NOT have the experienced required to use this product then you should NOT USE IT, you should simply contact your EcuTek Master Tuner shown clearly on the top of your Programming Kit or visit your preferred tuning shop to have a professional tuner to use it for you ** |