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  
me  
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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