| TUCSON(LM) >2011 > G 2.4 DOHC > Engine Electrical System > General Information>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 | Disconnect the voltage regulator to see if light turns off. If light turns off, 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 | Disconnect the voltage regulator or alternator to see if light turns off. If light turns off, replace voltage regulator.
Wiring | Repair or replace wiring
Overcharge | Electronic voltage regulator | Disconnect the voltage regulator to see if light turns off. If light turns off, 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 | Disconnect the voltage regulator or alternator to see if light turns off. If light turns off, replace voltage regulator.
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