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Home >> BMW >> 2021 >> i3 Range Extender >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> General Electrical System -- Repair (I01) >> 61 35 Control Units, Modules >> Notes on ESD protection (Electro Static Discharge)

Notes on ESD protection (Electro Static Discharge)

Special tools required: 

NOTE: Electrical components which are particularly sensitive to electrostatic discharge (electronic control units, sensors, etc.) are marked with the ESD warning symbol.
-Electro
-Static
-Discharge

Statically charged persons can discharge themselves when they tap electrical components.

NOTE: Humans can only detect a discharge starting from a level of approx. 3000 V.
The danger threshold for electrical components already starts from a level of approx. 100 V.
G04727627Courtesy of BMW OF NORTH AMERICA, INC.

Example:

Mechatronic control unit.

G14552866Courtesy of BMW OF NORTH AMERICA, INC.
G14552867Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Do not tap pins and multi-pin connectors directly! 
Only tap the housings of electrical components.
IMPORTANT: To avoid damaging or destroying electrical components as a result of electrostatic discharge, it is absolutely essential to observe the following instructions:
  • When replacing electrical components, leave the replacement components in their original packaging until immediately before they are to be installed
  • If necessary, always return a removed component in its original packaging (always pack the component away immediately)
  • Read and comply with user information on using the associated special tool 12 7 060 

Personal protective equipment: 

Electrically conducting clothing (high wool content, antistatic shoes required).

These can primarily be identified by the logo on the side.

G14552868Courtesy of BMW OF NORTH AMERICA, INC.