Table of Contents
Advertisement
is present. 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 since it operates automatically. An
immobilizer is considered as providing much more effective anti-theft
protection than an audible alarm alone.
As an anti-theft device, an immobilizer disables one of the systems
needed to start a car's engine, usually the ignition or the fuel supply.
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.
To prevent the car being used by unauthorized keys, the anti-theft key
matching function must be performed so that the immobilizer control
system on the car identifies and authorizes remote control keys to
normally use the car.
When the ignition switch key, ignition switch, combined instrument
panel, ECU, BCM, or remote control battery is replaced, anti-theft key
matching must be performed.
5.4.8 Injector Coding
Write injector actual code or rewrite code in the ECU to the injector
code of the corresponding cylinder so as to more accurately control or
correct cylinder injection quantity.
After the ECU or injector is replaced, injector code of each cylinder
must be confirmed or re-coded so that the cylinder can better identify
injectors to accurately control fuel injection.
32
User Manual
5.4.9 Battery Maintenance System Reset
This function enables you to perform a resetting operation on the
monitoring unit of vehicle battery, in which the original low battery
fault information will be cleared and battery matching will be done.
Battery matching must be performed in the following cases:
a) Main battery is replaced. Battery matching must be performed
to clear original low battery information and prevent the related
control module from detecting false information. If the related
control module detects false information, it will invalidate some
electric auxiliary functions, such as automatic start & stop function,
sunroof without one-key trigger function, power window without
automatic function.
b) Battery monitoring sensor. Battery matching is performed to re-
match the control module and motoring sensor to detect battery
power usage more accurately, which can avoid an error message
displaying on the instrument panel.
5.4.10 Diesel Particulate Filter (DPF) Regeneration
DPF regeneration is used to clear PM (Particulate Matter) from the
DPF filter through continuous combustion oxidation mode (such as
high temperature heating combustion, fuel additive or catalyst reduce
PM ignition combustion) to stabilize the filter performance.
DPF regeneration may be performed in the following cases:
a) The exhaust back pressure sensor is replaced.
b) The PM trap is removed or replaced.
c) The fuel additive nozzle is removed or replaced.
d) The catalytic oxidizer is removed or replaced.
e) The DPF regeneration MIL is on and maintenance is performed.
f) The DPF regeneration control module is replaced.
MDMAXPROHD
www.matcotools.com
877-853-3738
Advertisement
Table of Contents
