LAUNCH X-431 GDS Batterybox Manual
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4. Precaution items on battery test
1. For the purpose of getting accurate test results, unless otherwise special
required, all loads need to be power off such as headlamp, engine etc.
before testing battery.
2. 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.
3. 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.
4. The accuracy of battery voltage, charging voltage, start voltage is 0.01V in
test results; CCA (Cold Cranking Amps) precision is 5CCA.
5. 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.
6. 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
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