Hyundai Elantra: Charging System / Battery Sensor
Description and operation
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.

Repair procedures
1. | Turn the ignition switch OFF. |
2. | Disconnect the battery (-) terminal (A). Battery (-)terminal installation : 4.0 - 6.0 N.m (0.4 - 0.6 kgf.m, 3.0 - 4.4 lb-ft) |

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3. | Remove the battery. (Refer to Engine Electrical System - "Battery") |
4. | Remove the battery negative (-) cable after removing the bolts (A). Battery sensor cable installation bolt : 10.8 - 13.7 N.m (1.1 - 1.4 kgf.m, 8.0 -10.1 lb-ft) |

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1. | Install in the reverse order of removal. |
Description and operation
Description1.The CMF (Closed Maintenance Free) battery is, as the name implies, totally maintenance free and has no removable battery cell caps...
Other information:
Components1. Front impact sensor (FIS)2. Supplemental Restraint System Control Module (SRSCM)3. Front impact sensor (FIS)4. Gravity side Impact Sensor (G-SIS)5. Pressure Side Impact Sensor (P-SIS)..
General Service Information Protection of the Vehicle Always be sure to cover fenders, seats, and floor areas prior to beginning work.
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The support rod must be inserted into the hole near the edge of the hood whenever you inspect the engine compartment to prevent the hood from falling and causing possible injury.•
Make s..