Engine Electrical System

Repair Procedures

6steps
~36min
2/5difficulty
Done 0 of 6

Inspection on Vehicle

  • Make sure the 12 V auxiliary battery cables are connected to the correct terminals.
  • Disconnect the 12 V auxiliary battery cables when the battery is being quick-charged.
  • Never disconnect the 12 V auxiliary battery while the engine is running.
Check the terminals and fuses of the 12 V auxiliary battery.
  1. Make sure the 12 V auxiliary battery terminals are not loose or damaged by corrosion.
  2. Check the fuses for continuity.
  3. Warm up the engine, then turn it off.
  4. Turn off all accessories.
  5. Turn the ignition switch on. Make sure the charge indicator light is on.
  6. Start the engine and make sure the indicator light goes off. If the indicator light does not go off as specified, refer to the LDC Diagnosis section for further diagnosis of the 12 V auxiliary battery or charging system problem.
Check the charge warning lamp circuit.

Test yourself

A quick Kia Optima Hybrid Owner's Manual quiz: every answer comes with an explanation and a link to the manual page.