ETC Control Unit, Task

Transmission 722.6 in model 163 with touch shift

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 1.

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

Transmission 722.6 in Model 163 Without Touch Shift

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. 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)
• 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

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