Mercedes-Benz ML320. Manual — part 175

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

Fig. 96: ETC Control Module, Task With Touch Shift
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320

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

me

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

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 TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me