Group 30: Electrical system Repair instructions
19
General advice on working
with EMS engines
The following advice must be followed to avoid
damage to the engine control unit and other elec-
tronics.
IMPORTANT! The system must be disconnect-
ed from system voltage (by cutting the current
with the main switch) and the starter key(s) must
be in the 0 position when the engine control
module connectors are disconnected or connect-
ed.
● Never disconnect the current with the main
switches when an engine is running.
● Never undo a battery cable when the engine is
running.
● Turn the main switches off or disconnect the bat-
tery cables during quick charging of the batteries.
● NOTE! During normal trickle charging, it is not
necessary to turn the main switches off.
● Only batteries may be used for start help. A help
start device can produce a very high voltage and
damage the control unit and other electronics.
● If a connector is disconnected from a sensor, be
very careful to avoid allowing the contact pins to
come into contact with oil, water or dirt.
Repair instructions
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