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 replace
the battery sensor.
-
|
Ignition switch
ON/OFF. |
-
|
Park the vehicle about 4
hours. |
-
|
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. | |