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X-431 PRO5 User Manual
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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.
6.8 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.
6.9 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.
6.10 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.
6.11 Electronic Throttle Position Reset
This function enables you to make initial settings to throttle actuators and returns the “learned” values stored on
ECU to the default state. Doing so can accurately control the actions of regulating throttle (or idle engine) to adjust
the amount of air intake.
6.12 Gearbox Matching
1. This function can complete the gearbox self-learning to improve gear shifting quality.
2. When the gearbox is disassembled or repaired (after some of the car battery is powered off), it will lead to shift
delay or impact problem. In this case, this function needs to be done so that the gearbox can automatically
compensate according to the driving conditions so as to achieve more comfortable and better shift quality.
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