KIA Niro: Ignition System
Description
Ignition timing is controlled by the electronic control ignition timing
system. The standard reference
ignition timing data for the engine operating conditions are preprogrammed in
the memory of the ECM
(Engine Control Module).
The engine operating conditions (speed, load, warm-up condition, etc.) are
detected by the various
sensors. Based on these sensor signals and the ignition timing data, signals to
interrupt the primary
current are sent to the ECM. The ignition coil is activated, and timing is
controlled.
On-vehicle Inspection
Inspect ignition coil assembly and Perform spark test
- Check for DTCs.
Warning
If a DTC is present, perform Troubleshooting in accordance with the procedure for that DTC. (Refer to DTC guide)
- Check if sparks occur.
(1) Remove the engine cover.
(2) Remove the ignition coils.
(Refer to Ignition System - "Ignition Coil")
(3) Using a spark plug wrench, remove the spark plugs.
(4) Disconnect the injector extension connectors.
(5) Ground the spark plug to the engine.
(6) Check if sparks occur at each spark plug while engine is being cranked.
Warning
Do not crank the engine for more then 5 seonds.
- If sparks do not occur, perform the following test.
- Using a spark plug wrench, install spark plugs.
- Install the ignition coils.
- Install the engine cover.
Specification
Description
An ignition coil is an induction coil in an engine's ignition system which transforms the battery's low voltage to the high voltage needed to create an electric spark in the spark plugs to ignite the fuel. Coils have an internal resistor while others rely on a resistor wire or an external resistor to limit the current flowing into the coil from the battery 12 V supply.
Circuit Diagram
Ignition Coil Connector Terminal Function
Connector View
Ignition Coil Terminal Function
Ignition Coil (Cylinder #1)
Ignition Coil (Cylinder #2)
Ignition Coil (Cylinder #3)
Ignition Coil (Cylinder #4)
Troubleshooting
Connector assembly status test
- Remove the connector (A) and reinstall it.
Test for changing position of each ignition coil
- Ignition coil w/ misfire code
- Ignition coil w/o misfire code
Warning
Do not move with spark plug at the same time (move the ignition coil only)
READ NEXT:
Ignition Coil Repair procedures | Spark Plug Repair procedures
Removal
Turn ignition switch OFF and disconnect the battery negative (-) terminal.
Remove the engine cover.
Disconnect the ignition coil connector (A).
Remove the ignition coil (A) after loosening the mounting bolt.
I
Emission Control System
Components Location
PCV Valve
Canister
Purge Control Solenoid Valve (PCSV)
Fuel Tank Pressure Sensor (FTPS)
Fuel Level Sensor (FLS)
Fuel tank air Filter
Catalytic converter (WCC)
Gasoline Particulate Filter (GPF)
PCV Valve
SEE MORE:
Rear transverse trim | Luggage Side Trim Repair procedures
Rear transverse trim
Replacement
Remove the luggage board (A).
Disconnect the tailgate weatherstrip.
Remove the rear transverse trim (A).
Install in the reverse order of removal.
Warning
Make sure that
Engine Mechanical System / Troubleshooting
Symptoms :
Engine misfire with abnormal internal lower engine noises
Suspected area → Remedy
Worn crankshaft bearings → Replace the crankshaft and bearings as requ
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