Information on preventing damage to electronic components due to electrostatic discharge - AH54.00-P-0001-01A

All models 

Electrostatic charge 

The friction between two non-conducting materials causes the materials to be charged electrostatically. Plastics generally produce the highest electrostatic charge.

We come across electrostatic charge or discharge in lots of everyday situations, e.g. with:

• Combs
• Walking on carpets or plastic floors
• Putting on and taking off textiles
• Disembarking from the vehicle
• Contact between various electrostatically chargeable packaging materials in shelves or in the transport container

The following electrostatic discharge (E  lectro S  tatic D  ischarge (ESD)) can be so strong that a small electric shock is detected. Even the smallest discharges which people cannot detect can cause lasting damage to electronic components and control units.

Effects and consequences of ESD 

Electronic components and control units are very sensitive to ESD. The damage is often not immediately obvious, but becomes apparent some time later. In order to avoid failures and damage due to ESD in vehicle electronics, various procedures and safety precautions must be taken into account and followed.

Risks of damage occur during transport, handling, testing, removal and installation of electronic components in production as well as during repair work.

The following electronic components listed as an example can be damaged by ESD:

• Airbag components
• Control units, in particular their bus connections (Control Area Network (data bus/CAN bus) (CAN), local interconnect network (LIN) etc.)
• Sensors
• Mechatronic components (actuators etc.)
• Antenna amplifier
• Receivers and displays (Radio, TV, GPS, telephone etc.)

Modes of behavior and safety precautions 

• Electrostatic discharge from the fitter (e.g. due to brief contact with the vehicle body).
• Wear suitable clothing made of cotton.
• The ESD workplace must conform to the ESD guidelines.

ESD protection

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• Wear ESD safety shoes with conducting soles.

  ESD safety shoes can be ordered via the catalog of work protection range 2007-2009 under

• Special antistatic seat upholstery covers must be used for repair work on the vehicle.

  The antistatic seat upholstery covers are available from Datex Werkstatt Schutzbezuge GmbH

• Leave replacement parts in the original packaging for as long as possible, Do not cut open seals, but cut open carefully.
• Before unpacking, discharge ESD protective packaging at the ESD workplace.

ESD protection

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• Avoidance of contact with electrostatic chargeable materials such as PE, PVC, styrofoam.
• Use only original packaging or specially labeled and defined packaging and transport materials.
• Electronic components which have been removed must be put down on an ESD workplace.

ESD protection

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• Only take hold of electronic components by the housing, not by the pins or contacts.
• Electronic components must be installed before they are connected so that potential equalization with the body can take place.
• Shelves and worktables must stand directly on the floor, there must not be any insulating materials between the base of the shelves/feet and the floor. If the above mentioned insulators cannot be removed, the shelves and work tables must be grounded (e.g. low-resistance electrical connection/line from metal shelf to a heating pipe).
• Do not place a conductive transport container/box on an insulated surface (e.g. on a wooden pallet), otherwise potential equalization cannot take place.
• Do not place control units and electronic components removed from the vehicle on electrostatically chargeable materials, such as PE, PVC, styrofoam. The electrostatic charge is transferred to the control unit or electronic component. An ESD service kit or a connected ESD table mat must be used.

Returning electronic components in warranty and goodwill cases 

When returning electronic components it is absolutely essential to observe the procedure and safety precautions listed. Electrostatic charge or discharge mean the original fault can be falsified or overlaid.

This can lead to distorted fault symptoms in the case of the fault analysis of the component concerned.

ESD protection is only effective when the safety regulations and safety precautions are followed.