gf2760p2002p

Function of transmission control

Type gf · topic 27.60 · version 0103 · 2003-08-26

Applies to: TRANSMISSION 722.6 in MODELS 170, 202, 208, 210 with touch shift TRANSMISSION 722.6 in MODEL 203, 209 (except , 209.376) up to 31.5.03, 211 (except 211.076) up to 31.8.03, 215, 220 up to 31.8.02, 230 (except 230.474) up to 31.8.03

Where it sits

Function group 2 Chassis › 27 Automatic transmission › 27.60 Gearshift, control — Series 170 · Series 202 · Series 203 · Series 208 · Series 209 (models 308, 316, 320, 341, 342, 343, 354, 356, 361, 365, 372, 375, 377, 420, 441, 442, 454, 456, 461, 465, 472, 475, 476, 477) · Series 210 · Series 211 (models 004, 006, 007, 008, 016, 020, 022, 023, 024, 026, 028, 029, 041, 042, 052, 054, 056, 057, 061, 065, 070, 072, 077, 080, 082, 083, 084, 087, 089, 090, 092, 206, 207, 208, 216, 220, 222, 223, 226, 241, 242, 252, 254, 256, 257, 261, 265, 270, 272, 276, 277, 280, 282, 283, 284, 287, 289, 290, 292, 606, 608, 616, 620) · Series 215 · Series 220 · Series 230 (models 454, 456, 458, 467, 470, 471, 472, 475, 476, 477, 479)

Also applies to engines/gearboxes: 722 6**

GF27.60-P-2002P

Function of transmission control

12.11.99

TRANSMISSION 722.6 in MODELS 170, 202, 208, 210
with touch shift

TRANSMISSION 722.6
in MODEL 203, 209 (except , 209.376) up to 31.5.03,
211 (except 211.076) up to 31.8.03,
215, 220 up to 31.8.02,
230 (except 230.474) up to 31.8.03

Transmission control is divided into the electronic and hydraulic transmission control functions.

Whilst the electronic transmission control (ETC) takes over gear selection and the adaptation of pressures to the moment to be transmitted, the power supply control of the transmission takes place via the hydraulic elements of the electrohydraulic control unit. The oil supply to the hydraulic elements, such as the hydrodynamic torque converter, the shift elements and the hydraulic transmission control, is provided by way of an oil pump connected with the torque converter.

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The electronic transmission control (ETC) makes possible precise adaptation of the pressures to the respective operating conditions and to the engine output during the shift phase which leads to a significant increase in shift quality. It is possible to reach the rpm limit in the individual gears at full throttle and using kick-down.

While driving, the shift range can be changed in the forwards gears, however the electronic transmission control (ETC) prevents an unacceptably high engine rpm by means of downshift protection.

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Furthermore, electronic transmission control (ETC) offers the advantage of flexible adaptation to various vehicle and engine versions. The driver can choose between the two transmission mode "S" (standard program) and "W" (winter program). These also provide different gear ratios for reverse gear.

The ETC [ETC] control unit (N15/3) monitors and shifts depending on:

The vehicle speed

The position of the selector lever

Accelerator pedal position

Program selection ("W/S")

The state of the transmission

CAN signals

ETC control module, location/task

GF27.19-P-4012G

Electric control unit, location/task/design/function

GF27.19-P-5104G

Starter lockout contact, location/task/design/function

GF27.19-P-5106G

Temperature sensor, location/task/design/function

GF27.19-P-5108G

Speed sensor, location/task/function

GF27.19-P-5127G

Oil pump, location / task / design / function

GF27.10-P-5103G

Referenced documents