Additional Information For Vehicles With High Voltage System

Vehicles with a High-Voltage System (hybrid vehicles)

-- Perform a visual inspection of the high-voltage components and the high-voltage cables.

-- Never use tools that are for cutting, deformed, or sharp edged.

-- Never use welding, soldering, thermal adhesive or hot air.

-- Turn off the ignition.

-- Place the ignition key outside of the vehicle interior.

-- Never support objects on the high-voltage cables and the high-voltage connectors.

-- Never support tools on the high-voltage cables and the high-voltage connectors.

-- Never sharply bend or kink the high-voltage cables.

-- When connecting pay attention to the coding of the high-voltage connectors.

• For all procedures on vehicles with high-voltage system pay attention to the additional warning message for these vehicles. Refer to WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM .
• Procedures necessary near the components of the high-voltage system. Refer to PERFORMING A VISUAL INSPECTION OF DAMAGE TO HIGH VOLTAGE COMPONENTS AND CABLES  and SAFETY PRECAUTIONS or the appropriate service information. .
• Further information about the high-voltage system. Refer to SAFETY PRECAUTIONS or the appropriate service information. .
• If procedures on components of the high-voltage system are required, de-energize the high-voltage system. Refer to SAFETY PRECAUTIONS or the appropriate service information. .

• The engine may only be started if the refrigerant circuit is completely assembled.
• Hybrid drive on vehicles with battery cooling is only possible with a full A/C system in which there are no stored errors. Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function for the A/C system and the battery regulation.
• After the installation of the electrically-driven A/C compressor and the subsequent filling of the refrigerant circuit, start the A/C compressor for the first time using the "compressor intake" function for the basic setting. If the refrigerant oil was improperly stored before installation in the A/C compressor compression chamber, the A/C compressor may become damaged. Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function for the A/C system and the battery regulation.
• Only activate the electrically-driven A/C compressor when the refrigerant circuit is filled. The A/C compressor may become damaged if the A/C compressor is run when the refrigerant circuit is empty. Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function for the A/C system and the battery regulation.
• So that the refrigerant circuit can be emptied, evacuated and filled depending on the design of the refrigerant circuit different electric controlled valves must be opened (for example on the Audi Q7 e-tron). Refer to Refrigerant Circuit . Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function.
• For checking the A/C function specific electric controlled valves must be opened or closed (for example on the Audi Q7 e-tron). Refer to Refrigerant Circuit . Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function.
• The service connection on the high pressure side depends on the vehicle, not all operating conditions of the A/C system are on high pressure (for example on the Audi Q7 e-tron). For this reason to check the A/C function in these vehicles the sensor installed in the refrigerant circuit must be used. Refer to Refrigerant Circuit . Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function.

-- Charge the vehicle battery, for example, using the Battery Charger :VAS5904  in the battery support mode to minimize the number of automatic starts during the test- and measuring procedures while the ready mode is active. Refer to Battery, Charging and the appropriate service information. .

-- For testing and measurement procedures that require the ready mode to be active or the ignition to be switched on, the selector lever must be in the "P" position and the parking brake must be activated. The required tools must be placed so that they do not come into contact with any rotating components in the engine and they must also not go into the vicinity of the rotating components when the engine is running.