Double Clutch DSG 7 Gears

Typical Faults:
The vehicle does not move and the hydraulic pump continues to run
The engine does not start
The transmission cannot engage gears
The vehicle goes into recovery mode and the gear shifts to N (neutral)

Error Codes:
P017B - Transmission Locked
P072B - Transmission Locked
P073E - Unable to Engage Reverse Gear
P1735 - Gearbox Parameter Error
P173A - Stroke Sensor 1 for Gear Actuator
P173B - Control Sensor
P173C - Stroke Sensor 3 Not Plausible
P173E - Valve 1 in Transmission Block
P177B - Clutch 1 Transmission Fluid Pressure Switch Sensor
P17BF - Hydraulic Pump Play Protection Active
P17BF - Hydraulic Pump Play Protection Active
P1895 - Defective ECU and Interrupted CAN-Bus System
P1895 - Operation Limitation Due to Pressure Drop
P189A - Clutch 1 Clearance Too Small
P189C - Function Limitation, Insufficient Pressurization
P284F00 - Valve 2 in Block 1 of the Transmission
P2850 - Gear Actuator

The code 0AM325026E identifies a DSG 7-speed VAG transmission mechatronic unit for DQ200 transmissions, used on Volkswagen vehicles with a transverse engine and a dry dual-clutch.

The mechatronic unit is the electronic-hydraulic assembly that controls the transmission: it integrates the transmission control unit (TCU), the hydraulic module, the electric pump, the pressure circuit, the solenoid valves and several internal sensors. It is the component that manages gear engagement, the control of the two clutches, hydraulic pressure and transmission adaptation based on engine load, vehicle speed, throttle position and driver demand.

The associated transmission is the DSG 7-speed DQ200, known within the VAG group also under the code 0AM (later evolutions: 0CW). It is a dry dual-clutch transmission designed for low-to-medium torque vehicles, generally up to about 250 Nm.

Technical specifications

• Main spare part code: 0AM325026E.
• Transmission family: DSG 7-speed DQ200.
• Main transmission code: 0AM.
• Type: dry dual-clutch.
• Engine layout: transverse.
• Nominal transmission torque: about 250 Nm.
• Component: complete mechatronic unit with TCU electronic module and electro-hydraulic assembly.
• Control unit: J743 DSG Transmission Mechatronic.
• Mechatronic hydraulic circuit: separate from the mechanical transmission oil circuit.
• Mechatronic fluid: specific hydraulic oil type G 004 000 M2, with indicative quantity around 1.0–1.1 liters.
• Mechanical transmission oil circuit: separate from the mechatronic circuit, with indicative quantity around 1.6–1.7 liters when servicing.

DIPA can intervene to overhaul these components thanks to its experience and expertise.

Functions

• Controls engagement of the seven forward gears and reverse.
• Manages the two dry clutches of the DQ200 transmission.
• Coordinates the operation of the two internal sub-transmissions, one dedicated to even-numbered gears and the other to odd-numbered gears.
• Regulates the hydraulic pressure required to move the actuators.
• Activates the electric hydraulic pump when pressure drops below the required value.
• Deactivates the pump when hydraulic pressure reaches the expected value.
• Controls the solenoid valves for gear selection.
• Controls the solenoid valves for clutch control K1 and K2.
• Monitors circuit pressure via an integrated sensor.
• Monitors the internal temperature of the control unit and the hydraulic circuit.
• Receives data from the engine, ABS/ESP, shift lever, CAN network and instrument cluster.
• Performs adaptations of the clutches and gear selectors.
• Manages protection strategies in case of insufficient pressure, overheating, sensor error or solenoid valve malfunction.
• Can limit transmission operation to only one half of the gearbox in the presence of certain faults.

Model applications

• VOLKSWAGEN Golf VII

Common faults

• The car does not move and the hydraulic pump remains running
• The engine will not start
• The transmission cannot engage gears
• The vehicle goes into recovery mode and the gear goes to N

Error Codes

• P017B - Transmission locked
• P072B - Transmission locked
• P073E - Unable to engage reverse
• P1735 - Gearbox parameter error
• P173A - Travel sensor 1 for gear actuator
• P173B - Control sensor
• P173C - Travel sensor 3 not plausible
• P173E - Valve 1 in transmission lock
• P177B - Clutch 1 transmission fluid pressure switch sensor
• P17BF - Hydraulic pump play protection active
• P17BF - Hydraulic pump play protection active
• P1895 - Defective ECU and CAN-Bus interrupted
• P1895 - Operation limitation due to pressure drop
• P189A - Clutch 1 clearance too small
• P189C - Function limitation, insufficient pressurization
• P284F00 - Valve 2 in block 1 of the transmission
• P2850 - Gear actuator

Final conclusions

The VAG 0AM325026E mechatronic unit is a fundamental component of the DSG 7-speed DQ200 transmission, as it integrates electronic and hydraulic control of the transmission. It manages pressure, clutches, gear selection, sensors, solenoid valves and communication with the vehicle's other modules.

DIPA has a wide range of Automotive spare parts: from original parts to aftermarket items selected from the best manufacturers on the market. In addition, it offers remanufactured components with performance equivalent to new, allowing savings on replacement and contributing to environmental protection through the circular economy. If the part you need is not available, no problem: DIPA can remanufacture your part "on demand", restoring full functionality and safety in a short time.