Procedure For First Starting Engine After Filling Refrigerant Circuit

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On Vehicles with A High Voltage System (hybrid vehicles)

Read and follow all of the supplemental warnings for all work performed on vehicles with the high voltage system. Refer to HIGH VOLTAGE VEHICLES SAFETY PRECAUTIONS .

If it is necessary for the following procedure to perform work in the vicinity of high voltage components, "perform a visual inspection of the high voltage components and cables for damages" (Refer to HIGH VOLTAGE VEHICLES SAFETY PRECAUTIONS .) and "always follow the warnings when working on the high voltage system". .

WARNING:

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.

WARNING:

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.

CAUTION:

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.

CAUTION:

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. The A/C compressor may otherwise become damaged if before installation, refrigerant oil was improperly stored in the A/C compressor compression chamber. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function for A/C system and battery regulator.
Only activate the electrically driven A/C compressor when the refrigerant circuits are filled. If the refrigerant circuit is empty and the A/C compressor is running, the A/C compressor may become damaged. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function for A/C system and battery regulator.

All removed parts are installed once again.
The refrigerant circuit is filled. .

-- Check the Diagnostic Trouble Code (DTC) memory and erase any displayed entries using the v in the "Guided Fault Finding" function.

-- For vehicles with a high-voltage system (hybrid vehicles), operate the Electrical A/C Compressor -V470- via the "compressor cut-in" function. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function for the A/C system and battery regulation.

-- Open all instrument panel vents and, if present, the vents in the B-pillar.

-- Switch the ignition on.

The indicator lamp in the AC -button -9- does not illuminate.

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-- Start the engine with the A/C compressor switched off and let the engine run for at least five minutes.

-- Select the "Auto" mode from the Climatronic Control Module -J255- control head (and also from the Rear A/C Display Control Head -E265- if equipped) to turn on the A/C compressor (the indicator lamp in the AUTO -button and the AC -button illuminate).

The indicator lamp in the buttons -2, 4 and 9- illuminates.
The indicator lamp in the buttons -3 and 6- illuminates.

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NOTE:

By pressing the SYNC -button -10- on the Climatronic Control Module -J255- (only on the "Comfort" version), the adjustment for the front driver side is overridden on the passenger side and on the Rear A/C Display Control Head -E265-.

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-- The temperature preselection is set to "cold", via the knob from the Climatronic Control Module -J255- (for the driver and front passenger side).

-- In vehicles with a Rear A/C Display Control Head -E265-, also set the temperature preselection for the rear to "cold" (for the left and right side).

NOTE:

By pressing the SYNC button beforehand, the settings for the front driver side are applied to the front passenger side and also on the Rear A/C Display Control Head -E265-.

-- Let the engine and A/C compressor idle for at least five minutes.

NOTE:

Note the information regarding operating the A/C system after filling. .