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Battery Charging Failure

WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
BATTERY CHARGING FAILURE REFERENCE CHART

Condition Possible Cause Action
Undercharged battery  Accessory drive belt loose or worn Replace accessory drive belt  . See Accessory Drive Belt Removal and Installation .
Battery terminals loose or corroded Tighten battery terminals or replace battery  .
Rectifier, rotor or IC regulator faulty Repair or replace generator  . See Generator Disassembly and Reassembly 
One way clutch pulley faulty Repair one way clutch pulley  . See Generator Disassembly and Reassembly 
Overcharged battery  IC regulator faulty Repair or replace generator  . See Generator Disassembly and Reassembly