Kia Optima: Troubleshooting - General Information - Engine Electrical System - Kia Optima TF 2011-2018 Service ManualKia Optima: Troubleshooting

Trouble Shooting

Ignition System
Symptom
Suspect area
Remedy
Engine will not start or is hard to start (Cranks OK)
Ignition lock switch
Inspect ignition lock switch, or replace as required
Ignition coil
Inspect ignition coil, or replace as required
Spark plugs
Inspect spark plugs, or replace as required
Ignition wiring disconnected or broken
Repair wiring, or replace as required
Rough idle or stalls
Ignition wiring
Repair wiring, or replace as required
Ignition coil
Inspect ignition coil, or replace as required
Engine hesitates/poor acceleration
Spark plugs and spark plug cables
Inspect spark plugs / cable, or replace as required
Ignition wiring
Repair wiring, or replace as required
Poor mileage
Spark plugs and spark plug cables
Inspect spark plugs / cable, or replace as required

Charging System

Symptom
Suspect area
Remedy
Charging warning indicator does not light with ignition switch "ON" and engine off.
Fuse blown
Check fuses
Light burned out
Replace light
Wiring connection loose
Tighten loose connection
Electronic voltage regulator
Replace voltage regulator
Charging warning indicator does not go out with engine running. (Battery requires frequent recharging)
Drive belt loose or worn
Adjust belt tension or replace belt
Battery cable loose, corroded or worn
Inspect cable connection, repair or replace cable
Electronic voltage regulator or alternator
Replace voltage regulator or alternator
Wiring
Repair or replace wiring
Overcharge
Electronic voltage regulator
Replace voltage regulator
Voltage sensing wire
Repair or replace wiring
Discharge
Drive belt loose or worn
Adjust belt tension or replace belt
Wiring connection loose or short circuit
Inspect wiring connection, repair or replace wiring
Electronic voltage regulator or alternator
Replace voltage regulator or alternator
Poor grounding
Inspect ground or repair
Worn battery
Replace battery

Starting System

Symptom
Suspect area
Remedy
Engine will not crank
Battery charge low
Charge or replace battery
Battery cables loose, corroded or worn out
Repair or replace cables
Transaxle range switch (Vehicle with automatic transaxle only)
Refer to AT group-automatic transaxle
Fuse blown
Replace fuse
Starter faulty
Replace
Ignition switch faulty
Replace
Engine cranks slowly
Battery charge low
Charge or replace battery
Battery cables loose, corroded or worn out
Repair or replace cables
Starter faulty
Replace
Starter keeps running
Starter
Replace
Ignition switch
Replace
Starter spins but engine will not crank
Short in wiring
Repair wiring
Pinion gear teeth broken or Starter
Replace
Ring gear teeth broken
Replace fly wheel or torque converter


Specifications
Specifications Ignition System Items Specifications Ignition coil Primary resistance 0.62 ± 10 % (Ω) Secondary resis ...

Special Service Tools
Special Service Tools Tool (Number and name) Illustration Use Alternator pulley remover wrench (09373-27000) Removal ...

See also:

Variable Intermittent Wipers
Set the lever to the INT position and choose the desired wiper interval by turning the ring. ...

Seatback angle
To recline the seatback: 1. Lean forward slightly and lift up the seatback recline lever. 2. Carefully lean back on the seat and adjust the seatback of the seat to the position you desire. 3. R ...

Inside rearview mirror
Adjust the rearview mirror so that the center view through the rear window is seen. Make this adjustment before you start driving. WARNING - Rear visibility Do not place objects in the rear seat ...

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