Vehicles have many control units that use more electricity.
These units control their own system based on information from diverse
sensors. It is important to have a stable power supply as there diverse
sensors giving a variety of information. Battery sensor is mounted on
battery (-) terminal. It transmits battery voltage, current, temperature
information to ECM. ECM controls generating voltage by duty cycle based
on these signals.
When battery sensor signal fault occurs, inspect the vehicle
parasitic draw in advance after inspecting the sensor because the sensor
will behave abnormally when the parasitic draw is more than 100mA.
(Refer to vehicle parasitic current inspection)
Perform the following process after replacing the battery sensor.
1)
Ignition switch ON/OFF.
2)
Park the vehicle about 4 hours.
3)
After 4 hours later, check the SOC (State of charge) of battery using GDS.
For the vehicle equipped with a battery sensor, be careful
not to damage the battery sensor when the battery is replaced or
recharged.
1)
When replacing the battery, it should be same one (type,
capacity and brand) that is originally installed on your vehicle. If a
battery of a different type is replaced, the battery sensor may
recognize the battery to be abnormal.
2)
When installing the ground cable on the negative post of
battery, tighten the clamp with specified torque of 4.0~6.0N.m
(0.4~0.6kgf.m, 3.0~4.4lb-ft). An excessive tightening torque can damage
the PCB internal circuit and the battery terminal.
3)
When recharging the battery, ground the negative terminal of
the booster battery to the vehicle body. If the negative cable from a
battery charger is connected to the negative terminal of the battery,
the battery sensor can make an error. In this case, repeat the above
process for battery sensor replacement (1~3) after disconnecting and
reconnecting the battery connector.
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Kia Sportage: Battery Sensor: Description and Operation
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