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Home >> BMW >> 2011 >> 335i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 30 (General Electrical System - Repair - E90) >> Control Units, Modules, Sensors, Aerials >> 61 35... Notes on ESD protection (Electro Static Discharge)
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61 35... Notes on ESD protection (Electro Static Discharge)

WARNING: This page is about a different variant/trim than selected.

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

IMPORTANT: Read and comply without fail with the notes on this subject.

Statically charged persons can discharge themselves when they touch 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.

Fig 1: Caution For Checking Threshold For Electrical Components
G04727627Courtesy of BMW OF NORTH AMERICA, INC.

Example:

Mechatronic control unit.

Fig 2: Identifying Mechatronic Control Unit
G04727628Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Caution For Handling Mechatronic Control Unit
G04727629Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Do not touch pins and multi-pin connectors directly! 
Touch electrical components by their housings only.
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.

Fig 4: Identifying Electrically Conducting Clothing (High Wool Content, Antistatic Shoes Required)
G05780043Courtesy of BMW OF NORTH AMERICA, INC.