ETC Control Unit, Task (Without Touch Shift)
Transmission 722.6 in Model 163 Without Touch Shift
Task - The ETC control module (N15/3) determines the instantaneous operating condition for the vehicle and controls all gearshift sequences taking into account the ease of shifting and the driving situation. See Fig 1. 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)
- (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
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