Page 1233 of 4133
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:26 PMPage 64 © 2006 Mitchell Repair Information Company, LLC.
Page 1234 of 4133
Fig. 31: Torque Converter, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Wheel Speed Sensor, Location/Task/Function
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:26 PMPage 65 © 2006 Mitchell Repair Information Company, LLC.
Page 1235 of 4133
Fig. 32: Wheel Speed Sensor , Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:26 PMPage 66 © 2006 Mitchell Repair Information Company, LLC.
Page 1236 of 4133
Wheel Speed Sensor, Location
RPM sensors 2 and 3 (Y3/6n2 and Y3/6n3) are permanently connected with the supporting body of the
electrical control unit (Y3/6) via contact tongues. See Fig. 32
.
Wheel Speed Sensor,
The signals from the RPM sensors 2 3 (Y3/6n2, Y3/6n3) are recorded in the ETC control module (N15/3)
together with the wheel and engine speeds and other information, and are the input signals for the
electronic control system.
Wheel Speed Sensor, Function
See SPEED SENSOR, FUNCTION
.
Speed Sensor, Function
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Page 1237 of 4133
Fig. 33: Speed Sensor, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation
The RPM sensors are pressed against the transmission housing (51) by a spring (49) which is held against the
valve housing of the shift plate (2a). See Fig. 33
. This ensures a defined distance between the RPM sensors and
the exciter ring (50). RPM sensor 2 (Y3/6yn2) records the speed of the front sun gear via the outer multiple-disc
carrier of the front multiple-disc clutch (K1b) and RPM sensor 3 (Y3/6yn3) records the speed of the front
planetary gear carrier via the inner multiple-disc carrier of the front multiple-disc clutch (K1c).
Electronic Control Module, Location/Task/Design/Function
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:26 PMPage 68 © 2006 Mitchell Repair Information Company, LLC.
Page 1238 of 4133
Fig. 34: Electronic Control Module, Location/Task/Design/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:26 PMPage 69 © 2006 Mitchell Repair Information Company, LLC.
Page 1239 of 4133
Electronic Control Module, Location
Bolted onto the valve housing of shift plate (2a). See Fig. 34
.
Electronic Control Module, Task
To receive various input signals and to convert the control module information into hydraulic functions.
Electronic Control Module, Design
See ELECTRONIC CONTROL MODULE, DESIGN
.
Electronic Control Module, Function
See ELECTRONIC CONTROL MODULE, FUNCTION
.
Electronic Control Module, Design
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Page 1240 of 4133
Fig. 35: Electronic Control Module, Design
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Structure
The electrical control unit (Y3/6) consists of a supporting body made from plastic, in which the electrical
components, RPM sensors 2 and 3 (Y3/6n2, Y3/6n3), the regulating solenoid valves (Y3/6y1, Y3/6y2), the shift
solenoid valves (Y3/6y6), the starter lockout contact (Y3/6s1) and transmission oil temperature sensor (Y3/6b1)
are combined. See Fig. 35
. Conductor tracks integrated into the shell connect the electric components to a plug
connection (11).
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:26 PMPage 71 © 2006 Mitchell Repair Information Company, LLC.