MERCEDES-BENZ ML430 1997 Complete Repair Manual

The connection to the wiring harness on the vehicle side and the ETC control module (N15/3) is made via this
13-pin connector (11) with a bayonet lock.
With the exception of the solenoid valves, all other electric components are fixed to the conductor tracks.
Electronic Control Module, 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 72 © 2006 Mitchell Repair Information Company, LLC.

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 73 © 2006 Mitchell Repair Information Company, LLC.

Fig. 36: Electronic Control Module, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation
Signals from the ETC control module (N15/3) are conve rted into hydraulic functions in the electric valve
control unit (Y3/6). The RPM sensors (Y3/6n2, Y3/6n3) , the starter lockout contact (Y3/6s1) and the
transmission oil temperature sensor (Y3/6b1) of the electrical cont rol unit (Y3/6) supply the ETC control
module (N15/3) with input signals. The solenoid valves are controlled by the ETC control module (N15/3) and
trigger the hydraulic functions. See Fig. 36
.
Location/Task/Design/Function Of Freewheel
Fig. 37: Function Of Freewheel
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Freewheel Location

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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In the front planetary gear set a freewheel (F1, F2) is installed between the front sun gear (V1) and the
stator shaft (8) and in the rear planetary gearset between the rear sun gear (H1) and the intermediate shaft
(3). See Fig. 37
.
Freewheel Task

Optimizes individual gearshifts. Support of the individual elements of a planetary gear set against each
other or against the transmission housing in one direction of rotation in order to permit torque
transmission.
Freewheel Design

The freewheels (F1, F2) consist of an outer race (12), an inner race (13), a number of clamping bodies
(14) and a clamping body cage (15).
Freewheel Function

See FREEWHEEL, FUNCTION
.
Freewheel, Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Fig. 38: Freewheel 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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Operation - If the inner race (13) of the freewheel is locked and the outer race (12) turns in direction "A" , the
locking elements (14) adopt a diagonal position on account of their special contours, allowing the freewheel
function. See Fig. 38
. The outer race (12) slides over the locking elements (14) with negligible friction. If the
rotation of the outer race (12) changes to direction "B", the locking elements (14) stand up and lock the outer
and inner races (12, 13) together.
Transmission Housing Breathing, Location/Task
Fig. 39: Transmission Housing Breather, Location/Task
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Transmission Housing Breather, Location

The inside of the transmission and the breather (72) are connected by a channel which is cast into the
torque converter casing. See Fig. 39
.
Transmission Housing Breather, Task

The transmission housing vent compensated the pressure in the transmission housing if temperature-
related volume changes in the transmission oil and air occur.
Kick-Down Switch, Location/Task/Design
Fig. 40: Kickdown Switch, Location/Task/Design
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Kick-Down Switch, Position


2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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The kickdown switch (S16/6) is located in the footwell, integrated into the electric accelerator pedal. See
Fig. 40
.
Kick-Down Switch, Task

Influencing the shift program of th e electronic transmission control.
Kick-Down Switch, Design

The kickdown switch (S16/6) cons ists of a spring-tensioned electrical switch contact.
Location/Task/Function Of Command Valve

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Fig. 41: Location/Task/Function of Command Valve
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Command Valve, Location

Each shift group possesses one command valve. The 1-2/4-5 command valves (31a) and 2-3 (31b) are
installed in the valve housing of the shift plate (2b), the 3-4 command valve (31c) is installed in the valve
housing of the shift plate (2a). See Fig. 41
.
Command Valve, Task

The command valves switch the shift groups from the stationary phase into the shift phase and back
again.
Command Valve, Function

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Command Valve, 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 80 © 2006 Mitchell Repair Information Company, LLC.

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 81 © 2006 Mitchell Repair Information Company, LLC.