Kia Rio: Charging System / Battery Sensor

Description and Operation

Description

Vehicles have many control units that consume more electrical power. These units control their own systems based on information from various sensors. It is important to have a stable power supply because different sensors provide different information. The battery sensor (A) is installed on the battery negative (-) terminal. It transmits battery voltage and current and temperature information to the ECM. The ECM controls the charging voltage duty cycle based on these signals.

Repair Procedures

Removal

1
Turn the ignition off.
2
Disconnect the negative (-) terminal (A) from the battery.
3
Disconnect the battery sensor connector (B).
4
Remove the battery sensor by loosening the mounting bolts (C).

Negative (-) battery terminal nut tightening torque:

4,0–6 N·m

Battery sensor cable mounting bolt (chassis ground):

10,8–13.7 N·m

Installation

Install in the reverse order of removal.
NOTE
- After reconnecting the negative battery cable, the AMS and ISG function do not operate until the system stabilizes, approximately 4 hours.
  
  When disconnecting the negative (-) battery cable during repair work on a vehicle equipped with the ISG function, the battery sensor recalibration procedure must be performed after the repair work is completed. (Refer to Battery Sensor Recalibration Procedure)
NOTE
- On a vehicle equipped with a battery sensor, be careful not to damage the battery sensor when replacing or recharging the battery.
1. When replacing the battery, use one of the same type, capacity and brand as originally installed on your vehicle. Installing a different type of battery may cause the battery sensor to detect a battery fault.
2. When installing the ground cable to the battery negative terminal, tighten the clamp to the specified torque. Excessive tightening torque may damage the internal printed circuit and battery terminals.
3. When charging the battery, ground the negative terminal of the auxiliary battery to the vehicle body.

Battery Sensor Recalibration Procedure

After reconnecting the battery negative cable, the AMS function does not operate until the system stabilizes, approximately 4 hours. When disconnecting the negative (-) battery cable from the battery during repair work on a vehicle equipped with the AMS function, the battery sensor recalibration procedure must be performed after the repair work is completed.

1
Turn the ignition switch ON and OFF.
2
Park the vehicle for approximately 4 hours with the hood closed and all doors closed.