transmission oil MERCEDES-BENZ ML320 1997 Complete Manual PDF

(B3). The further sequence of the switch-on process is as when engaging the rear multi-disc brake.
Residual Pressure
To avoid air getting into the hydraulic system, which causes a deterioration in shift quality, the line system
remains filled with oil in steady-state operation of the automatic transmission.
Function Of Shift From 1 To 2

See SHIFT FROM 1 TO 2, FUNCTION
.
Shift From 1st To 2nd, Function
NOTE: No mating surface on the piston of the center multi-disc brake (B3).

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Holding Pressure Shift Valve, Location/Task/Design/Function

See HOLDING PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Shift Pressure Shift Valve, Location/Task/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Task/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Location/Task/Function Of Command Valve

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Lubricating Pressure, Function
Operation
The working pressure regulating valve diverts surplus oil to the lubrication pressure regulating valve, from
where it is controlled and used for lubricating and cooling the mechanical transmission and torque converter. In
addition the pressure in the torque converter is limited via the lubrication pressure.
Working Pressure Regulating Valve, Location/Task/Function

See WORKING PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Lubrication Pressure Regulating Valve, Location/Task/Function

See LUBRICATION PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Torque Converter Lockup Clutch Regulating Valve, Location/Task/Function

See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Upshift/Downshift Solenoid Valve, Location/Task/Design/Function

See UPSHIFT/DOWNSHIFT SOLENOID VALVE, LOCATION/TASK/DESIGN/FUNCTION
.

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Shift Pressure Control Solenoid Valve, Location/Task/Design/Function

See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Multiple-Disc Brake, Location/Task/Design/Function

See MULTIPLE
-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION.
Multiplate Clutch, Location/Task/Design/Function

See MULTI
-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION.
Holding Pressure Shift Valve, Location/Task/Function

See HOLDING PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Shift Pressure Shift Valve, Location/Task/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Task/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Location/Task/Function Of Command Valve

See ELOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Shift Pressure, Function
Operation
The shift pressure is determined by the shift pressure regulating solenoid valve (Y3/6y2) and the shift pressure
regulating valve.
The shift pressure:
Regulates the pressure in the activating shift element during the shift phase.
Determines together with the modulating pressure the pressure reduction at the deactivating shift element

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See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Modulating Pressure, Function
Operation
The modulating pressure influences the size of the working pressure and determines together with the shift
pressure the pressure regulated at the overlap regulating valve.
The modulating pressure is regulated at the modulating pressure regulating solenoid (Y3/6y1), which is under
regulating valve pressure. The modulating pressure via variable and relative to the engine load.
Modulating Pressure Regulating Solenoid Valve, Location/Task/Design/Function

See MODULATING PRESSURE REGULATING SOLENOID VALVE,
LOCATION/TASK/DESIGN/FUNCTION.
Working Pressure Regulating Valve, Location/Task/Function

See WORKING PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Task/Function

See NOVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Upshift/Downshift Solenoid Valve, Location/Task/Design/Function

See UPSHIFT/DOWNSHIFT SOLENOID VALVE, LOCATION/TASK/DESIGN/FUNCTION

Shift Pressure Control Solenoid Valve, Location/Task/Design/Function

See SHIFT PRESSURE REGULATING SOLENOID VALVE,
LOCATION/TASK/DESIGN/FUNCTION.
Location/Task/Design/Function Of PWM Solenoid Valve, Torque Converter Lockup Clutch

See LOCATION/TASK/DESIGN/FUNCTION OF PWM SOLENOID VALVE, TORQUE
CONVERTER LOCKUP CLUTCH.

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Multiple-Disc Brake, Location/Task/Design/Function

See MULTIPLE
-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION.
Multiplate Clutch, Location/Task/Design/Function

See MULTI
-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION.
Holding Pressure Shift Valve, Location/Design/Function

See HOLDING PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Shift Pressure Shift Valve, Location/Design/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Command Valve, Location/Design/Function

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Regulating Valve Pressure Regulating Valve, Location/Task/Function

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Shift Pressure Shift Valve, Location/Task/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Task/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Location/Task/Function Of Command Valve

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Shift Valve Pressure, Function
Operation
The shift valve pressure is derived from the regulating valve pressure, regulated at the shift valve pressure
regulating valve and is then present:
1-2 And 4-5 Shift Solenoid Valve (Y3/6Y3)
3-4 Shift Solenoid Valve (Y3/6Y4)
2-3 Shift Solenoid Valve (Y3/6Y5)
Torque Converter Lockup PWM Solenoid Valve (Y3/6Y6)
3-4 And 2-3 Shift Pressure Valve Shift Valve
The shift valve pressure controls the command valves via the upshift/downshift solenoid valves.
Upshift/Downshift Solenoid Valve, Location/Task/Design/Function

See UPSHIFT/DOWNSHIFT SOLENOID VALVE, LOCATION/TASK/DESIGN/FUNCTION
.
Location/Task/Design/Function Of PWM Solenoid Valve, Torque Converter Lockup Clutch

See LOCATION/TASK/DESIGN/FUNCTION OF PWM SOLENOID VALVE, TORQUE
CONVERTER LOCKUP CLUTCH.
Shift Pressure Regulating Valve, Location/Task/Function


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See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION.
Shift Pressure Shift Valve, Location/Design/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Shift Valve Pressure Regulating Valve, Location/Task/Function

See SHIFT VALVE PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Shift Pressure Regulating Solenoid Valve, Location/Task/Design/Function

See SHIFT PRESSURE REGULATING SOLENOID VALVE,
LOCATION/TASK/DESIGN/FUNCTION.
Multiple-Disc Brake, Location/Task/Design/Function

See MULTIPLE
-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION.
Multiplate Clutch, Location/Task/Design/Function

See MULTI
-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION.
Holding Pressure Shift Valve, Location/Design/Function

See HOLDING PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Design/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Location/Task/Function Of Command Valve

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Overlap Regulating Valve, Location/Task/Function

2001 Mercedes-Benz ML320
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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. 157
.
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):

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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

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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

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