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Immobilizer (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 an immobilizer.
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 MK906 can disable a lost vehicle keys and program the
replacement key fob. One or more replacement key fobs can be programmed.
To program the replacement key fob(s)
1. Tap IMMO KEYS after entering the Service function from the
MaxiCOM 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 once
displayed. The list may vary by test vehicle.
NOTE
1. To complete key fob programming, the Security Code will need to be
required. This can be done through the Security Code Read function in hot
functions.
2. Before programming, please check and erase the fault codes.
4. Read the on-screen information carefully and follow the instructions to
complete the operation.
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