Mercedes-Benz ML320. Service manual - part 204

 

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Mercedes-Benz ML320. Service 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)  

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 

 

 

 

 

 

 

 

 

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