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THINKCAR
19
d) After replacing or disassembling the intake port, the controlling of the idle speed by the coordination
between the electronic control unit and the throttle body is aff ected.
e) Although the characteristics of the idle throttle potentiometer have not changed, the intake volume has
changed and the idle control characteristics have changed at the same throttle openings.
3.4.3 Steering Angle Reset
To reset the steering angle, fi rst fi nd 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.
3.4.4 Battery Matching
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.
3.4.5 ABS Bleeding
When the ABS contains air, the ABS bleeding function must be performed to bleed the brake system to
restore ABS brake sensitivity. If the ABS computer, ABS pump, brake master cylinder, brake cylinder, brake
line, or brake fl uid is replaced, the ABS bleeding function must be performed to bleed the ABS.
3.4.6 Break-pad Reset
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.
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
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