Application Guide

LAUNCH X431 PROS MINI Reset Service Functions:
Besides ECU coding, ALL systems’ diagnoses and bi-directional test, X-431 PROS MINI also
features various and helpful service functions. The most commonly performed service functions
contain:
1. Oil Reset Service
This function can be performed in the following cases:
i. If the service lamp is on, you must provide service for the car. After service,you need to
reset the driving mileage or driving time so that the service lamp turns off and the system
enables the new service cycle.
ii. After changing engine oil or electric appliances that monitor oil life, you need to reset the
service lamp.
2. Steering Angle Calibration
This function can be performed in the following cases:
i. To reset the steering angle, first find the relative zero point position for the car to drive in
straight line. Taking this position as reference, the ECU can calculate the accurate angle for
left and right steering.
ii. After replacing the steering angle position sensor, replacing steering mechanical parts (such
as steering gearbox, steering column, end tie rod, steering knuckle), performing four-wheel
alignment, or recovering car body, you must reset the steering angle.
3. Electronic Parking Brake Reset
i. If the brake pad wears the brake pad sense line, the brake pad sense linesends a signal sense
line to the on-board computer to replace the brake pad.After replacing the brake pad, you
must reset the brake pad. Otherwise, the car alarms.
ii. Reset must be performed in the following cases:
1) The brake pad and brake pad wear sensor are replaced.
2) The brake pad indicator lamp ison.
3) The brake pad sensor circuit is short, which is recovered. The servo motor is replaced.
4. ABS Bleeding
This function allows you to perform various bi-directional tests to check the operating conditions
of Anti- lock Braking System (ABS).
i. When the ABS contains air, the ABS bleeding function must be performed to bleed the
brake system to restore ABS brakesensitivity.
ii. If the ABS computer, ABS pump, brake master cylinder, brake cylinder, brake line, or
brake fluid is replaced, the ABS bleeding function must be performed to bleed the ABS.
5. Electronic Throttle Position Reset / Learn
This function enables you to initialize the throttle actuators so that the “learned” values stored on
ECU are returned to the default state. Doing so can accurately regulate throttle (or idle engine)
operations to control the amount of air intake. Throttle matching must be performed in the
following cases:
i. The ECU is replaced and the ECU does not yet store throttle working features.