Page 1281 of 4133
Fig. 62: Torque Converter Lockup PWM Solenoid Valve  
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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        Page 1282 of 4133
Torque Converter Lockup PWM Solenoid Valve, Location 
 
In the supporting body of the electrical control unit (Y3/6) and pressed against the valve housing of the 
shift plate (2a) by means of a leaf spring (2c). See Fig. 62
. 
Torque Converter Lockup PWM Solenoid Valve, Task 
 
The PWM solenoid valve for the torque converter lockup (Y3/6y6) controls the pressure for the torque 
converter lockup clutch. 
Torque Converter Lockup PWM Solenoid Valve, Design 
 
See TORQUE CONVERTER LOCKUP PWM SOLENOID VALVE, DESIGN
. 
Torque Converter Lockup PWM Solenoid Valve, Function 
 
it converts a pulse-width-modulated current actuated by the ETC control module (N15/3) into the 
corresponding hydraulic pressure KUB (p-S/KUB).  
Torque Converter Lockup PWM Solenoid Valve, Design 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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Saturday, October 02, 2010 3:15:27 PMPage 113 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1283 of 4133
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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Saturday, October 02, 2010 3:15:27 PMPage 114 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1284 of 4133
Fig. 63: Torque Converter Lockup Clutch PWM Solenoid Valve, Design
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 
Structure - The torque converter lockup PWM solenoid valve (Y3/6y6) is sealed off to the valve body of the 
shift plate (2a) by an O-ring (34) and a seal (arrow). See Fig. 63
. The contact springs (32) on the PWM 
converter lockup solenoid valve (Y3/6y6) engage in a slot in the conductor tracks (33). The force of the contact 
spring (32) ensures safe contacts. 
Modulating Pressure Regulating Solenoid Valve, Location/Task/Design/Function 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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        Page 1285 of 4133
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662  
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Saturday, October 02, 2010 3:15:27 PMPage 116 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1286 of 4133

Fig. 64: Modulating Pressure Regulating Solenoid Valve, Location/Task/Design/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 
Modulating Pressure Regulating Solenoid Valve, Location 
 
In the supporting body of the electrical control unit (Y3/6) and pressed against the valve housing of the 
shift plate (2a) by means of a leaf spring. See Fig. 64
. 
Modulating Pressure Regulating Solenoid Valve, Task 
 
To control the modulating pressure depending on the constantly changing operating conditions such as 
load/gear changes. 
Modulating Pressure Regulating Solenoid Valve, Design 
 
See MODULATING PRESSURE REGULATING SOLENOID VALVE, DESIGN
. 
Modulating Pressure Regulating Solenoid Valve, Function 
 
The modulating pressure regulating solenoid valve (Y3/6y1) assigns a proportional pressure to the current 
which is controlled by the ETC control module (N15/3) according to the load.  
Modulating Pressure Regulating Solenoid Valve, Design 
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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Saturday, October 02, 2010 3:15:27 PMPage 117 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1287 of 4133
 
2001 Mercedes-Benz ML320 
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662  
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Saturday, October 02, 2010 3:15:27 PMPage 118 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1288 of 4133
Fig. 65: Modulating Pressure Regulating Solenoid Valve
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 
Structure - The modulating pressure regulating solenoid valve (Y3/6y1) had an interference fit and is sealed of 
to the valve body of the shift plate (2a) by a seal (arrow). See Fig. 65
. The contact springs (32) on the 
modulating pressure regulating solenoid valve (Y3/6y1) engage in a slot in the conductor tracks (33). The force 
of the contact spring (32) ensures safe contacts. 
Shift Pressure Regulating Solenoid Valve, 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 3:15:27 PMPage 119 © 2006 Mitchell Repair Information Company, LLC.