Safety precautions when working in the power supply system
Caution: When carrying out any installation work, particularly in the engine compartment due to the tight layout, the following must be taken into account. Lines of all types (for example, fuel, hydraulic, activated carbon canister, cooling systems, refrigerant circuits, brake system lines and hoses, vacuum), and electrical wires must be laid as they were originally laid. To avoid damage, ensure sufficient free space to all moving and hot parts. When removing and installing the fuel level sensor "G" or fuel pump (fuel supply unit) from full or partially filled fuel tanks, please note the following: Remove the fuel pump fuse. The fuel system is under pressure!
Pressure relief
CAUTION: The injection system is divided into a high-pressure area (up to max 120 bar) and the low area (about 6 bar) pressure. Before opening the high-pressure circuit, for example to remove the high-pressure pump, fuel rail, injectors, fuel lines or fuel pressure sensor "G247", the fuel pressure in this circuit must be reduced in a certain way to a residual pressure of about 6 bar. Disconnect the electrical connector from the fuel pressure regulating valve "N₂76" "arrow".
Let the engine idle for about 10 seconds.
Instructions: When the connector is disconnected from the fuel pressure regulating valve -N₂76- with the engine idling, the pressure in the high-pressure area is reduced to approx. 6 bar. After the high pressure has been released, the high-pressure circuit must be opened immediately, as the pressure increases due to heat. Switch off the ignition. Now place clean rags around the connection and carefully open to release the residual pressure of approx. 6 bar. After completing the work, interrogate the fault memory of the engine control unit and delete any faults that may have been stored due to the disconnection of the connector.
(The information is presented on the website www.VWManual.ru)
Instructions: After clearing the fault memory, you need to create an OBD code.
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