| This manual is intended to provide foremen and mechanics with the basic knowledge needed to ensure reliable and successful repairs. |
Note | This requires careful study of the manual, coupled with suitable training on automotive air conditioning systems (with a qualification test if applicable) and the ability to apply the acquired expertise in practice. |
| This document is a compact reference work which should be kept at the workplace. It should also be available for presentation to the responsible supervisory agency on request. |
| Vehicles with high-voltage system (hybrid vehicles) |
WARNING | Safety hazard: the engine can start unexpectedly. |
| Before carrying out general work on a vehicle with high-voltage electrical system, switch off the ignition and remove the ignition key from the vehicle. |
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WARNING | Working on vehicles with high-voltage wiring: |
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| Do not support yourself or tools on high-voltage wiring or associated components --> this can damage the insulation. |
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| High-voltage wiring must not be excessively bent or kinked --> this can damage the insulation. |
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| The round high-voltage connectors are colour-coded with an external coloured ring and are provided with mechanical coding or guide lugs. It is important to observe this coding when joining up the round high-voltage connectors, otherwise the connectors can be damaged. |
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DANGER! | Risk of fatal injury if high-voltage components are damaged. |
| Observe the following when working in the vicinity of high-voltage components or wiring: |
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| It is not permitted to use cutting or forming tools, other sharp-edged tools or heat sources such as welding, brazing, soldering, hot air or thermal bonding equipment. |
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| Before starting work, visually inspect the high-voltage components in the areas involved. |
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| Before working in the engine compartment, visually inspect the power electronics -JX1-, electric drive motor -V141-, air conditioner compressor -V470- and high-voltage wiring. |
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| Before working on the vehicle underbody, visually inspect the high-voltage wiring and covers. |
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| Before working on the rear section of the vehicle, visually inspect the high-voltage wiring and the electro-box with the maintenance connector for high-voltage system - TW -. |
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| Visually inspect all potential equalisation lines. |
| Check the following when making the visual inspection: |
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| There must be no external damage on any component. |
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| The insulation of the high-voltage wiring and potential equalisation lines must not be damaged. |
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| There must be no unusual deformation of the high-voltage wiring. |
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| All high-voltage components must be identified by a red warning sticker. |
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| Vehicles with start/stop system |
WARNING | Injury risk due to automatic engine start (vehicles with start/stop system). |
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| On vehicles with an activated start/stop system (indicated by a message in the instrument cluster display), the engine may start automatically on demand. |
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| Therefore, please make sure that the start/stop system is deactivated when performing repair work on the vehicle (switch off the ignition, and switch it on again if required). |
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Caution | Tools or materials (e.g. sealing additives) that have not been approved can damage or impair the system. |
| Use only tools and materials that have been approved by the manufacturer. |
| Warranty claims are not accepted if tools or materials that have not been approved are used. |
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