Full Product Manual

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has learnt the sensor identifications and positions.
For other services, please follow the on-screen instructions to operate.
On completion of the drive cycle, carry out the tire pressure monitor system
test application.
IMMO Service
An immobilizer is an anti-theft mechanism that prevents an automobile’s
engine from starting unless the correct ignition key or other device is present.
This device prevents thieves from starting the car by a method known as hot
wiring. Most new vehicles have an immobilizer as standard equipment. An
important advantage of this system is that it doesn’t require the car owner to
activate it; it operates automatically. An immobilizer is considered as
providing much more effective anti-theft protection than an audible alarm
alone; many auto insurance companies offer lower rates for vehicles that are
equipped with them.
As an anti-theft device, an immobilizer disables one of the systems needed
to start a car's engine, usually the fuel supply or the ignition. This is
accomplished by radio frequency identification between a transponder in the
ignition key and a device called a radio frequency reader in the steering
column. When the key is placed in the ignition, the transponder sends a signal
with a unique identification code to the reader, which relays it to a receiver in
the vehicle's computer control module. If the code is correct, the computer
allows the fuel supply and ignition systems to operate and start the car. If the
code is incorrect or absent, the computer disables the system, and the car
will be unable to start until the correct key is placed in the ignition.
The IMMO service of MX808 enables you to disable the lost vehicle keys and
program the replacement key fob. It could be one replacement key fob or
more, depending on your needs.
 To program the replacement key fob(s)
1. Tap IMMO KEYS after entering the Service function from the
MaxiCheck Job Menu.
2. Tap Automatic Selection or Manual Selection to acquire vehicle
VIN information and tap Yes to confirm.
3. Tap Erase/Program all key fobs in the IMMO function list after it is