Geely EC718 2009 Workshop Manual page 358

2-276 Engine Anti-theft System JL4G18-D Engine
2.5.3 System Working Principle
2.5.3.1 System Working Principle
When the ignition key is inserted into the ignition cylinder and
ignition switch is at ON position, the transponder will be excited
by electronic Anti-theft ignition cylinder coil. the transponder
will send a signal containing its own information. the signal is
received by the engine anti-theft system antenna and sent to
the engine control module Anti-theft system. Engine control
module Anti-theft system compares this value with the value
stored in memory. If the ignition key is recognized as valid, the
engine anti-theft system control module will send the enable
fuel instruction to the engine control module through the serial
data line; if the transponder information is not correct, the
engine anti-theft system control module will send the disable
fuel instruction to the engine control module.
Note
When the engine control module receives the instruction
to disable fuel, ECM will also send to the BCM disable
starter instruction through the CAN bus. So the starter
will also be locked to prevent the engine running; At the
same time, BCM will also activate alarm (if the remote
control anti-theft system is not in silent mode) and trigger
turning indicators start flashing.
Warning!
If use the invalid ignition key and if the ignition switch is
turned too fast, before the anti-theft engine control
module sends instruction to disable the fuel, the starter
is still possible to run even start. At this point, it is likely
to cause injury to engine repair personnel.
EC718/EC718RV EC715/EC715RV 10/2009