LAUNCH X-431 PAD III User Manual
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The operating time required for charging system and actuation system test
varies from person to person. If the engine does not start or accelerate within 30
seconds, the system will prompt you “receiving timeout” and return to the initial
status.
Whether Engine is off or not has no influence on charging and actuation test
result after increased speed is detected, but other loads need to be powered off.
The accuracy of battery voltage, charging voltage, start voltage is 0.01V in test
results; CCA (Cold Cranking Amps) precision is 5CCA.
Generally, charging voltage value is greater than starting voltage.
Charging voltage range is as follows: 13.8--14.5V for domestic vehicle;
13.3--15.5V for imported vehicles. The voltage varies with different car models,
so you have to judge based on related vehicle models. In general, the DC
voltage is stable, but it also varies with different revolution speed.
Starting voltage range: The value higher than 9.6V is regular, otherwise it is too
low. Due to different situations, whether the starting voltage is higher or not does
not mean the vehicles or batteries are faulty. For detailed faults, other special
equipments are needed. To validate the accuracy of the value, the best method
is to collect the signals of starting and charging voltage and observe it on an
oscillometer.
Generally, the voltage is lower than 11V for the bad cell battery, but it is possible
that the battery is completely exhausted or has a serious low capacity. In this
case, just recharge your battery. Bad cell always happens when the loads on a
stopping vehicle are turned on for a long time.
Please note that it is normal for quick detecting of “Increase speed” because it
follows the theory of detecting “Increase speed”: If the detected voltage is higher
than the previous battery test voltage, the system will prompt you a message of
“Engine has been speeded”
It has no influence on test result in the event that engine’s output voltage or
engine revolution is not very stable. No matter whether the vehicle is accelerated
or not, the output voltage only differs within 0.2V.
While doing inside the vehicle test, Kelvin clip is always found to be in poor
contact. To remain it in good contact, please shake it several times before
testing. Take down the battery connector, and test it again, the value probably
varies. The deviation may arise from battery connector.
Pay more attention to connect the clip. The battery poles connect with conductor,
which makes the clip has a poor connection when testing battery. A tolerance of
dozens of CCA occurs if the clip is out of position, or oil, dust attaches on the
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