Kia Optima: Ignition System / Ignition Coil
Description and operation
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.
Specifications
Item
|
Specification
|
Primary Coil Resistance (Ω)
|
0.75 ± 15% [20°C (68°F)]
|
Secondary Coil Resistance (kΩ)
|
5.9 ± 15% [20°C (68°F)]
|
Schematic diagrams
Repair procedures
| 1. |
Disconnect the negative battery (-) terminal.
|
| 2. |
Remove the engine cover.
|
| 3. |
Disconnect the ignition coil connector (A).
| •
|
When removing the ignition coil connector, pull the lock
pin (A) and push the clip (B).
|
|
|
| 4. |
Remove the ignition coil (A).
|
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 Ib-ft)
|
|
| 1. |
Install in the reverse order of removal.
|
| 1. |
Measure the primary coil resistance between terminals 1 and 2.
|
Standard value : 0.75Ω ± 15%
|
|
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Turn the ignition switch ON.
2.
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Ignition System
Spark Plug