Mercedes-Benz ML320. Manual — part 204



Selector Lever Position/Shift Range

ETC Control Unit, Task

Transmission 722.6 in Model 163 Without Touch Shift

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

Fig. 158: ETC Control Module without Touch Shift
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Task

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

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. See Fig. 158. This
involves receiving , converting and transmitting various digital and analog signals.

Input Signals:



Starter Lock-Out Contact (Y3/6S1)



RPM Sensor 2 (Y3/6N2)



RPM Sensor 3 (Y3/6N3)



Transmission Oil Temperature Sensor (Y3/6B1)



Kickdown Switch (S16/6)



Gear Recognition Switch (S16/10)

Output signals:



Reverse/Parking Lock Valve

Input And Output Signals:



Datalink Connector (X11/4)

In addition there is a connection via the engine compartment bus to the:



ME-SFI Control Module (N3/10) or CDI Control Module (N3/9)



Traction System Control Module (N47)

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Transfer Case Control Module (N78)

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)



Reverse And Parking Lock Solenoids (Y66/1)



Selector Lever Position (P/N) to the Engine Control Module (ME-SFI) (N3/10) (only on detection of the
selector lever position "P" or "N" on the transmission range recognition switch (S16/10) and at the starter
interlock contact (Y3/6s1)).

Traction System Control Module (N47):



Wheel Speeds



Gear Shift



Traction Status

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

Transfer Case Control Module (N78):



Position of Transfer Case (off-road or on-road ratio)



Engine Torque



Engine Speed



Accelerator Pedal Position



Gear Soft



Engine Status

The following information is output to other systems:

ME-SFI Control Module (N3/10) or CDI Control Module (N3/9):



Kickdown Switch (S16/6)



Engage Drive Mode

Traction System Control Module (N47):



Transmission Ratio



Speeds

Oil Level Control, Function

Operation - The oil level control system seals the opening between the oil gallery and gearset chamber so that
the rotating gearsets do not splash about in oil as the oil level rises. The oil level control reduces power loss and
prevents oil from being thrown out of the transmission housing at high oil temperatures.

Float, Location/Function

See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION.

Transmission Housing Breathing, Location/Task

See TRANSMISSION HOUSING BREATHING, LOCATION/TASK.

Function Of Torque Converter Lockup Clutch Control

Operation

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me