Safety
& Accessory
Initial Use
Diagnostics
FAQ & Care
Product Profile
35
www.x431.com +86 755 8455 7891
LAUNCH
PAD VII
User Manual
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.
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
