Charging System: Troubleshooting
NOTE:
- Be careful not to short-circuit the wiring by the body or other wirings.
- In case of discharging problem, measure dark current at all times.
(Charging System - "Dark Current Inspection").
- When checking the alternator main fuse, perform continuity test and voltage test between terminals as well as visual check to confirm normal operation.
- When checking the ground, repair or replace after inspecting for defective ground cable, defective installation or defective contact due to foreign object.
- It is not recommended to use non-authentic parts as installing non-authentic parts may cause malfunction of charging system.
- Be careful as misassembly may cause short-circuit of wiring, which may result in battery discharge.
- As it will reset and appear as normal if the battery negative (-) terminal is disconnected while measuring dark current, measure by using a hook meter without disconnecting the negative (-) terminal.
- Note that there may be various phenomenons / possible causes / repair measures apart from above.
- For more effective repairs, refer to DTC guide and ETM.
| Symptom | Suspected Area | Remedy |
|---|---|---|
| Charging warning lamp does not turn on during IG ON. | Broken alternator main fuse | Inspect / Repair / Replace fuse. |
| Broken instrument cluster fuse | Inspect / Repair / Replace fuse. | |
| Broken instrument cluster internal bulb | Inspect / Repair / Replace instrument cluster. | |
| Defective connection of wiring connector | Inspect / Repair / Replace wiring connection. | |
| Defective voltage regulator or alternator | Inspect / Repair / Replace voltage regulator or alternator. | |
| Defective connection of battery terminal | Inspect tightening of (+) and (-) battery terminals to specified torque. | |
| Communication error | Inspect wiring between regulator and ECM. | |
| Inspect transmission signal of ECM. | ||
| Inspect / Repair / Replace alternator if the wiring and ECM are normal. | ||
| Charging warning lamp does not turn off during engine running. | Worn drive belt or lack of tension | Inspect / Repair / Replace drive belt. |
| Defective connection, corroded or worn battery cable | Inspect connection of battery cable and Inspect / Repair / Replace cable. | |
| Broken alternator main fuse | Inspect / Replace alternator main fuse or battery cable. | |
| Defective voltage regulator or alternator | Inspect / Replace voltage regulator or alternator. | |
| Defective wiring | Inspect / Replace wiring. | |
| Defective instrument cluster | Inspect / Replace instrument cluster | |
| Slip in alternator pulley | Inspect / Replace alternator pulley. | |
| Adjust tension / Replace drive belt. | ||
| Defective connection of battery terminal | Inspect tightening of (+) and (-) battery terminals to specified torque. | |
| Charging warning lamp turns on. | Slip, worn or lack of tension in drive belt | Adjust tension / Replace drive belt. |
| Inspect / Replace auto tensioner (only for auto tensioner type). | ||
| Error in Alternator Management System (AMS) voltage | Inspect battery sensor connecting harness and connection with body. | |
| Error in battery sensor | Inspect / Repair / Replace battery sensor. | |
| Short between battery sensor wiring and body | Inspect / Repair / Replace battery sensor. | |
| Defective alternator L terminal output power | Inspect / Repair / Replace alternator or regulator. | |
| Degradation due to defective contact of battery (+) terminal | Check tightening to specified torque / Inspect / Repair / Replace battery wiring. | |
| Short in alternator connecting extension connector internal pin | Inspect / Repair / Replace wiring. | |
| Short circuit between body and mission ground | Inspect / Repair / Replace ground. | |
| Communication error | Inspect / Repair / Replace wiring between regulator and ECM. | |
| Inspect transmission signal of ECM. | ||
| Inspect / Repair / Replace alternator if wiring and ECM are normal. | ||
| Short in the middle of connection to alternator L terminal (L terminal applied vehicle model) |
Inspect / Repair / Replace wiring. | |
| Drive belt rotation stops due to slip in crankshaft damper pulley or defective pulley. | Inspect or replace crankshaft damper pulley / Inspect, repair or replace drive belt tensioner bearing. | |
| Slip, worn or lack of tension in drive belt | Adjust tension / Inspect / Repair / Replace drive belt. | |
| Defective voltage regulator | Inspect / Repair / Replace voltage regulator. | |
| Defective alternator | Inspect / Repair / Replace alternator. | |
| Broken alternator main fuse | Inspect / Repair / Replace alternator main fuse or battery wiring cable. | |
| Defective ground | Inspect / Repair / Replace ground. | |
| Discharged battery | Adjust tension / Inspect / Repair / Replace drive belt. | |
| Inspect / Repair / Replace wiring connection. | ||
| Inspect / Repair / Replace alternator main fuse. | ||
| Inspect / Repair / Replace alternator. | ||
| Inspect / Repair / Replace voltage regulator. | ||
| Inspect / Repair / Replace battery unit. | ||
| Inspect for dark current / Repair / Replace. | ||
| Learn / Inspect / Repair / Replace battery sensor. | ||
| Inspect for short / Repair / Replace battery cable. | ||
| Inspect / Repair / Replace ECM. | ||
| Inspect / Repair / Replace body electrical related parts. | ||
| Inspect / Repair / Replace installation status of alternator connector. | ||
| Inspect / Repair / Replace tightening of (+) and (-) battery terminals to specified torque. | ||
| Swollen battery | Defective battery | Inspect / Replace battery. |
| Defective voltage regulator or alternator | Inspect / Repair / Replace voltage regulator or alternator. | |
| Defective charging related parts or wiring | Inspect / Repair / Replace charging related parts and wiring. | |
| After inspection, repair or replace related parts in case of malfunction. | ||