2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 275Get this manual
1J-2 Charging System: Condition Battery overcharges Possible cause Faulty regulatorrectifierFaulty batteryPoor contact of generator lead wire couplerCracked battery caseBattery has been left in run-down condition for long timeCorrectionReference Item ReplaceReplaceRepairReplace the batteryReplace the battery "Sulfation", acidic white powdery substance or spots on surfaces of cell plates Battery runs down quickly Trouble in charging system
Battery discharged too rapidly Battery "sulfation"
Check the generator, regulatorrectifier and circuit connections and make necessary adjustments to obtain specified charging operationCell plates have lost much of their active Replace the battery and correct the charging materials result of overchargingsystemInternal short-circuit in the batteryReplace the batteryToo low battery voltageRecharge the battery fullyToo old batteryReplace the batteryDirty container top and sidesCleanOld battery ReplaceIncorrect charging rate(When not in Replace the batteryuse battery should be checked at least once month to avoid sulfation The battery was left unused in cold Replace the battery if badly sulfatedclimate for too long