audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Principles of air conditioning systems > < Safety measures for vehicles with start/stop system

A4 Mk1

Other reference material
Other reference material
t  Workshop Manual for model-specific maintenance work → Heating, air conditioning; Rep. gr.87 or → Air conditioning; Rep. gr.87 (model-specific Workshop Manual) and → Current flow diagrams, Electrical fault finding and Fitting locations
t  Technical Service Handbook (TPI) outlining action to be taken to rectify current problems
t  Self-study programmes, e.g. → No.208
t  Video training courses for dealerships
t  List of special tools and workshop equipment required for repairing the air conditioner → Catalogue of workshop equipment
t  Service Organisation Handbook, Vol. 1 „Additional equipment“ → Audi ServiceNet, Handbooks
t  Workshop Manual: Air conditioner with refrigerant R12 (for vehicles built up to model year 1993; this Workshop Manual is available in hardcopy form only)
Vehicles with high-voltage system (hybrid vehicles)
For all work on vehicles with a high-voltage system, note the warning instructions for working on such vehicles → Chapter „Warning instructions when working on vehicles with high-voltage system“ and → Electrical system; Rep. gr.93.
  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.
  WARNING
Working on vehicles with high-voltage wiring:
l  Do not support yourself or tools on high-voltage wiring or associated components --> this can damage the insulation.
l  High-voltage wiring must not be excessively bent or kinked --> this can damage the insulation.
l  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.
  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:
t  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.
t  Before starting work, visually inspect the high-voltage components in the areas involved.
t  Before working in the engine compartment, visually inspect the power electronics -JX1-, electric drive motor -V141-, air conditioner compressor -V470- and high-voltage wiring.
t  Before working on the vehicle underbody, visually inspect the high-voltage wiring and covers.
t  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 -.
t  Visually inspect all potential equalisation lines.
Check the following when making the visual inspection:
t  There must be no external damage on any component.
t  The insulation of the high-voltage wiring and potential equalisation lines must not be damaged.
t  There must be no unusual deformation of the high-voltage wiring.
t  All high-voltage components must be identified by a red warning sticker.
   

Principles of air conditioning systems > < Safety measures for vehicles with start/stop system