1997 MERCEDES-BENZ ML320 automatic transmission

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 158 © 2006 Mitchell Repair Information Company, LLC.

Fig. 92: Shift Pressure Regulating Valve, Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Float, Location

In the electrical control unit (Y3/6). See Fig. 92
.
Float, Function

See FLOAT, FUNCTION
.
Float, Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 159 © 2006 Mitchell Repair Information Company, LLC.

Fig. 93: Float, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Function - With low oil levels, the lubrication oil which flows constantly out of the gearset, flows back to the
oil gallery (A) through the opening (46). If the oil level rises, the oil presses the float (45) against the housing.
See Fig. 93
.
The float (45) therefore separate the oil gallery (A) from the gearset chamber (B). The lubricating oil which
continues to flow out of the gearsets is thrown against the housing wall, incorporated by the rotating parts and
flows back into the oil
gallery (A) through the upper opening (arrow).

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 160 © 2006 Mitchell Repair Information Company, LLC.

ETC Control Unit, Location/Task
Fig. 94: ETC Control Unit, Location/Task
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
ETC Control Unit, Location

See ETC CONTROL UNIT, LOCATION
.
ETC Control Unit, Task

See ETC CONTROL UNIT, TASK (EXCEPT CODE (428A) STEERING WHEEL SWITCH
BUTTONS).
ETC Control Unit, Location

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 161 © 2006 Mitchell Repair Information Company, LLC.

Fig. 95: ETC Control Module, Location
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Location - The ETC control module (N15/3) is installed in the left footwell, on the heater/air conditioning
housing. See Fig. 95
.
ETC Control Unit, Task
Transmission 722.6 in model 163 with touch shift

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 162 © 2006 Mitchell Repair Information Company, LLC.

Fig. 96: ETC Control Module, Task With Touch Shift
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 3:15:27 PMPage 163 © 2006 Mitchell Repair Information Company, LLC.

Task - The ETC control module (N15/3) determines the instantaneous operating condition of the vehicle and
controls all gearshift sequences taking into account the ease of shifting and the driving situation. This involves
receiving, converting and transmitting various digital and analog signals. See Fig. 96
.
It receives operating data in the form of input signals from:
Starter Lock-Out Contact (Y3/6S1)
RPM Sensor 2 (Y3/6N2)
RPM Sensor 3 (Y3/6n3)
Transmission Oil Temperature Sensor (Y3/6B1)
In addition there is a connection via the engine compartment bus to the:
Instrument Cluster (A1)
ME-SFI Control Module (N3/10) or CDI Control Module (N3/9)
The solenoid valves for the modulating and shift pressure and for the gear changes are actuated by the ETC
control module (N15/3).
The pressure required is calculated from all input signals, adjusted to the torque to be transferred. The following
information from other systems is then processed.
ME-SFI Control Module (N3/10) or CDI Control Module (N3/9):
Engine Torque
Engine Speed
Accelerator Pedal Position
Gear Shift
Engine Status
Electronic Selector Lever Module Control Module (N15/5):
Kickdown Switch (S16/6)
Selector Lever Position P/N
Traction System Control Module (N47):
Transmission Ratio
Speeds
Instrument Cluster (A1):
Selector Lever Position/Shift Range

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 164 © 2006 Mitchell Repair Information Company, LLC.

ETC Control Unit, Task (Without Touch Shift)
Transmission 722.6 in Model 163 Without Touch Shift
Fig. 97: ETC Control Module without Touch Shift

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 165 © 2006 Mitchell Repair Information Company, LLC.