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Hyundai Equus: Troubleshooting - General Information - Engine Electrical System - Hyundai Equus VI 2009-2020 Service ManualHyundai Equus: Troubleshooting

Troubleshooting
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
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
If light turns off, replace voltage regulator or alternator
Wiring
Repair or replace wiring
Overcharge
Electronic voltage regulator
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
If light turns off, 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 motor 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 motor faulty
Replace
Starter keeps running
Starter motor faulty
Replace
Ignition switch
Replace
Starter spins but engine will not crank
Short in wiring
Repair or replace wiring
Pinion gear teeth broken or starter motor
Replace
Ring gear teeth broken
Replace fly wheel or torque converter

    Specifications
    Specification Ignition System Ignition Coil ItemSpecification Primary Coil Resistance (x)0.62 10% [20C (68F)]Secondary Coil Resistance (kx)7.0 15% [20C (68F)] Spark Plug ItemS ...

    General Information
    The Micro 570 Analyzer The Micro 570 Analyzer provides the ability to test the charging and starting systems, including the battery, starter and alternator.     x Because of ...

    See also:

    DRIVE mode / SNOW mode
    The drive mode may be selected according to the drivers preference or road condition. The system initializes to the NORMAL mode when the Engine Start/Stop Button is turned off and on. It is d ...

    Trunk Lid Back Panel Repair procedures
    Replacement     Put on gloves to protect your hands.     When prying with a flat-tip screwdriver, wrap it with protective tape, and apply prote ...

    Trip Computer Mode
    This mode displays driving information like the tripmeter, fuel economy, and so on. ❈ For more details, refer to Trip Computer in this chapter. ...

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