Checking EGM
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Status September 2003 (EvoBus-Service / AFT) Page: 79 of 83
5.5 Safety precautions when working on EGM
The following safety precautions must always be observed to prevent damage to the engine components
or wiring harness and to avoid endangering persons!
• Never start the engine without the battery being firmly connected (battery terminals firmly
connected).
• Do not disconnect batteries from the vehicle electrical system with the engine running.
• False polarity of the control unit supply (e.g. false polarity of the batteries) can lead to the control unit
being destroyed.
• Do not use quick chargers to start the engine. Only carry out auxiliary starting with separate
batteries.
• To quick-charge the batteries, they must be disconnected from the vehicle electrical system.
• The control unit connector may only be disconnected or connected with the electrical system
switched off (Ter. 15 OFF).
• The lambda probe connector may only be disconnected or connected with the electrical system
switched off (Ter. 15 OFF).