LAUNCH    X-431 PRO Series User Manual 
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Figure 6-1 
6.1 Oil Reset Service 
This function allows you to perform reset for the engine oil life system, which 
calculates an optimal oil life change interval depending on the vehicle driving 
conditions and climate. 
This function can be performed in the following cases: 
1. 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. 
2. After changing engine oil or electric appliances that monitor oil life, you need 
to reset the service lamp. 
6.2 Electronic Parking Brake Reset 
1.  If the brake pad wears the brake pad sense line, the brake pad sense line 
sends 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. 
2.  Reset must be performed in the following cases: 
a) The brake pad and brake pad wear sensor are replaced. 
b) The brake pad indicator lamp is on. 
c) The brake pad sensor circuit is short, which is recovered. 
d) The servo motor is replaced. 
6.3 Steering Angle Calibration 
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. 
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. 
6.4 ABS Bleeding 
This  function  allows  you  to  perform  various  bi-directional  tests  to  check  the 
operating conditions of Anti-lock Braking System (ABS).