Description and Operation: Description
Vehicles have many control units that consume electricity. These units control their own system based on information from a variety of sensors. It is important to have a stable power supply to assure the various sensors provide accurate information. Battery sensor (A) 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.
CAUTION:
When battery sensor signal fault occurs, inspect that the parasitic draw is not abnormal more than 100mA as it will cause the sensor voltage to be abnormal. (Refer to VEHICLE PARASITIC CURRENT INSPECTION )
NOTE:
It takes a few hours for a new battery sensor to detect the battery state correctly.
Perform the following process after replacing the battery sensor.
Perform the following process after replacing the battery sensor.
- Ignition switch ON/OFF.
- Park the vehicle about 4 hours.
- After 4 hours later, check that the SOC (State of charge) of battery is displayed on GDS properly.
CAUTION:
For the vehicle equipped with a battery sensor, be careful not to damage the battery sensor when the battery is replaced or recharged.
- When replacing the battery, it should be same (type, capacity and brand) as originally installed on your vehicle. If a battery of a different type is installed, the battery sensor may recognize the battery to be abnormal.
- When installing the ground cable on the negative post of battery, tighten the clamp with specified torque of 3.9~5.9 N.m (0.4~0.6 kgf.m, 3.0~4.4 lb-ft). An excessive tightening torque can damage the PCB internal circuit and the battery terminal.
- When recharging the battery, ground the negative terminal of the booster battery to the vehicle body.