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.
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the battery sensor connector (A).
3.
Remove the battery negative (-) cable after removing the bolt (B).
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Recover the refrigerant with a recovery/ recycling/ charging station.
3.
When the engine is cool, drain the engine coolant from the radiator.
4.
Remove the expansion valve cover (A).