General Repair Information
Vehicles With A High Voltage System (Hybrid Vehicles)
Observe all of the additional warnings for all work performed on vehicles with the high voltage system. Refer To HIGH VOLTAGE VEHICLES SAFETY PRECAUTIONS and WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM .
Risk Of Unintended Engine Start
The Ignition Must Be Turned Off And The Ignition Key Must Remain Outside Of The Vehicle When Working On Vehicles With A High Voltage System.
Handling High Voltage Cables:
- Do not stand on or place tools on high voltage cables and their components as it may damage the cable insulation.
- Never bend or kink high voltage cables forcefully as it may damage the cable insulation.
- The round high voltage connectors are color coded with an external color ring and are mechanically coded using the guide- or code tabs. Always make certain that the coding matches when connecting the round connector in order to avoid any mechanical damage the high voltage connector.
There Is A Risk Of Electrocution From Damaged High Voltage Components.
Observe The Following When Working Around High Voltage Components And High Voltage Wires:
- Never work around high voltage components and cables with cutting, deformed, or sharp edged tools, or heat sources such as welding or soldering tools, heated air, and thermal glue.
- Inspect the high voltage components visually before beginning.
- Perform a visual inspection of the Electric Drive Power and Control Electronics -JX1-, the Electro-Drive Drive Motor -V141-, the Electrical A/C Compressor -V470- and the high voltage lines when working in the engine compartment.
- Perform a visual inspection of the high voltage lines and covers when working on the underbody.
- Perform a visual inspection of the high voltage lines and the Electrobox with the High Voltage System Maintenance Connector -TW- when working in the luggage compartment.
- Perform a visual inspection on all of the potential equalization cables.
Observe The Following Items When Performing The Visual Inspection:
- The components do not display any signs of external damage.
- The high voltage cable insulation and the potential equalization cables are not damaged.
- The high voltage cables do not display any abnormal deformations.
- Every high voltage component is marked with a red warning label.
Vehicles With Start/Stop System
On Vehicles With The Start/Stop System, The Engine Could Start Automatically And Cause Serious Personal Injury.
- If the Start/Stop System is activated (recognizable by a message in the instrument cluster), it is possible to start the engine automatically.
- Make sure the Start/Stop System is deactivated when working on the vehicle (switch off ignition and turn on again as needed).
ALL VEHICLES
Before Working On Electrical System (Wiring), Remove Relevant Fuse(s).
Disconnect The Battery -A-, The Auxiliary Battery -A1- And The Traction Battery -A2- Before Starting Any Electric Welding On The Vehicle. Refer To BATTERY, DISCONNECTING AND CONNECTING .
The A/C refrigerant system may be discharged and opened only when it is for safety reasons or if components of the A/C refrigerant system must be replaced. Refer To SAFETY PRECAUTIONS and REFRIGERANT CIRCUIT, DISCHARGING .
When Performing All Other Usual Vehicle Repair Work, The Refrigerant Circuit Of The A/C System Should Remain Closed.
Repairs to the heating and A/C system without opening the refrigerant circuit are possible and are described in these Service Information. Refer To REFRIGERANT CIRCUIT (Repairs on the refrigerant circuit), OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT (A/C system control and regulation components, not located in passenger compartment), and OVERVIEW - COMPONENTS INSIDE FRONT PASSENGER COMPARTMENT (Components for activation and regulation of A/C system, located in passenger compartment).
The Connections For The Sensors/Switches Described In This Service Information Are Fitted With A Valve Which Closes Automatically When The Switches Are Unscrewed. These switches can thus be replaced in any Audi and Volkswagen workshop even though the refrigerant circuit is fully charged.
Service work on the A/C system that require the refrigerant circuit to be discharged and thus cannot be performed in every Audi and Volkswagen workshop. Refer To REFRIGERANT CIRCUIT (Repairing Refrigerant Circuit). Certain tools are required to discharge the refrigerant circuit, these work procedures must only be performed by trained personnel as well. If necessary, bring the vehicle to a workshop that has the required tools and in which the work can be performed by qualified personnel. Refer To A/C SYSTEM, GENERAL INFORMATION R134a or WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM / WORKING WITH A/C SERVICE STATION 1234yf .