REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz C-Class (W203, 2000 issue)

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Mercedes-Benz
	W203
		Introduction
		Instruction Manual
		Routine maintenance
		Engine
		Cooling and heating
		The power supply system and release
		Electric motor
		Manual gearbox
		Automatic Transmission
			Specifications
			Automated Manual gearshift 716.6
			Automatic Transmission 722.6
				Troubleshooting - General Information
				Objectives of the electronic control unit and the control signals
				Removing and installing AT torque converter
				The electrohydraulic control unit AT (AT is installed)
				Disassembly and assembly of electro-hydraulic control unit
				Disassembly and assembly of the plate gear
				Transmission and torque converter housing
				Multi-disc brake B2, B3 and gear lock in the "parking"
				Disassembly and assembly of the rear of the hollow shaft to the rear freewheel
				Removing and installing multi-disc brake B1 and the oil pump
				Dismantling and assemblage of the oil pump
				Disassembly and assembly of multi-disc brake B1
				Disassembly and assembly of multi-disc brake B2
				Disassembly and assembly of the output shaft to the central unit and the rear planetary gears
				Removing and installing multi-plate clutch K1, K2 and K3
				Dismantling and assembling clutch K1
				Disassembly and assembly of the drive shaft with the clutch K2 and the front planetary gears unit
				Dismantling and assembling clutch K3
				The locking mechanism in the "parking lot"
				Removing and installing selector lever gear
		Coupling and power shafts
		Brakes
		Suspension and steering
		Body
		Onboard electric

printable version

Objectives of the electronic control unit and the control signals

Control unit for automatic transmission


K38 - Lock the starter relay module N2 / 2 - Power management SRS N15 / 1 - Control unit 5-speed AT (TCM)	N15 / 3 - Control of transmission (TCM) N54 - The control unit RCL

Pin Assignments 13-pin connector Transmission


1 - 3 RPM sensor (Y3 / 6n3) 2 - E / magnetic modulating pressure control valve (Y3 / 6y1) 3 - 2 RPM sensor (Y3 / 6n2) 4 - Input temperature sensor (Y3 / 6b1) and lock the starter contact (Y3 / 6s1) 5 - 6 - Power supply e / solenoid valves 7 - Power supply sensor 8 - E / solenoid valve gear 2-3 (Y3 / 6y5)	9 - E / solenoid valve gear 3-4 (Y3 / 6y4) 10 - E / pressure control solenoid valve switch (Y3 / 6y2) 11 - E / solenoid valve (locking of the rotation) (Y3 / 6y6) 12 - Sensor housing 13 - E / shift solenoid valve 1-2 / 4-5 (Y3 / 6y3)

Input and output signals of the control unit AT 722.6 and CAN bus data exchange


N15 / 3 - Control ETC X11 / 4 - Connector DLC Y3 / 6b1 - ATF temperature sensor Y3 / 6n2 - speed sensor 2 Y3 / 6n3 - Speed sensor 3 Y3 / 6s3 - Contact lock starter Y3 / 6U1 - solenoid valve pressure modulation Y3 / 6u2 - shift solenoid Y3 / 6u3 - solenoid valve switches 1-2 and 4-5 Y3 / 6u4 - Shift solenoid valve 3-4 Y3 / 6u5 - Shift solenoid valve 2-3	Y3 / 6u6 - solenoid valve PWM converter lock A1 - Dashboard CAN - Bus engine compartment N3 / 10 - Control unit ME-SFI [ME] N15 / 3 - Control ETC N15 / 5 - The control unit is an electronic shift lever N47 - The control traction control N73 - The control unit EIS

Tasks

The control unit ETC (N15 / 3) determine the actual operating parameters of the vehicle and controls the sequential shift transmission, on the basis of ease of switching and driving parameters.

Activating the solenoid valve switching is carried out by command of the control unit ETC (N15 / 3). The desired pressure value is calculated based on incoming data and correction adjustment required transmitted torque.

Undergoes the following processing data coming from other systems:

The control unit ME-SFI (N3 / 10) / CDI (N3 / 9)

?� The engine torque;
?� Gear;
?� Emergency mode;
?� Operation Tempostat;
?� Activation of the speed limit;
?� The operation of the starter;
?� Activation mode kickdown (both models, 01.06.02)
?� The operating parameters of the engine.

The control unit of the electronic gear shift (N15 / 5)

?� The position of the lever;
?� The gauge-switch modes of transmission (S16 / 5);
?� The gauge-switch activate the kickdown (S16 / 6) (on 31.05.02)

Traction control system control unit (N47)

?� Speed of wheels;
?� The torque brake;
?� Fact squeezing the brake pedal;
?� Parking brake status.

The control unit EIS [EZS] (N73)

?� Status of contact terminals;
?� Option transmission.

Dashboard (A1)

?� Position selector lever / gear selected.

Traction control system control unit (N47)

?� Option transmission;
?� The information on the selected program.

The control unit ME-SFI (N3 / 10) / CDI (N3 / 9)

?� The engine torque;
?� Emergency mode;
?� Activation of the motion;
?� Selector lever position P / N;
?� The gauge-switch modes of transmission (S16 / 5)
?� Option transmission.

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