User's Manual

iSmartTool Series User Manual

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. 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.

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 In-car inspection, battery cable clamps are 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

pole. The gear and main body of clip should be fully matched with battery poles.

Note: Battery poles inside the vehicle are enveloped by connectors, which may

produce some errors for test results. The tolerance results from the resistance of

connectors. The greater the resistance value is, the greater the tolerance becomes. But

generally, the tolerance does not affect the test conclusion.

4.2 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.

It needs to be performed in the following cases:

1. The main battery is replaced.

2. The battery monitoring sensor is replaced.