Kia Picanto: Engine Electrical System / Ignition System

Kia Picanto JA 2017-2022 Service & Repair Manual / Engine Electrical System / Ignition System

Description and operation
Description
Ignition timing is controlled by the electronic control ignition timing system.
The standard reference ignition timing data for the engine operating conditions are pre-programmed in the memory of the ECM (Engine Control Module).
The engine operating conditions (speed, load, warm-up condition, etc.) are detected by 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.
Repair procedures
On-vehicle Inspection
Inspect ignition coil assembly and Perform spark test
1.
Check for DTCs.
   
If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC. (Refer to DTC guide)
2.
Check for sparks.
(1)
Remove the engine cover.
(2)
Remove the cylinder head center cover.
(3)
Remove the ignition coils.
(4)
Using a spark plug wrench, remove the spark plugs.
(5)
Disconnect the 3 injector connectors.
(6)
Ground the spark plug to the engine.

(7)
Check for sparks at each spark plug while the engine is being cranked.
   
Do not crank the engine for more than 5 seconds.
3.
If sparks do not occur, perform the following test.

4.
Using a spark plug wrench, install spark plugs.
5.
Install the ignition coils.
6.
Install the cylinder head center cover and the engine cover.
Troubleshooting
Troubleshooting
Symptom
Suspected 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 stalling
Ignition wiring
Repair wiring, or replace as required
Ignition coil
Inspect ignition coil, or replace as required
Engine hesitation/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

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