The ESC indicator will illuminate when the ignition switch is turned ON, but should go off after approximately 3 seconds. When the ESC is on, it monitors the driving conditions. Under normal driving conditions, the ESC indicator will remain off. When a slippery or low traction condition is encountered, the ESC will operate, and the ESC indicator will blink to indicate the ESC is operating.
But, if the ESC system malfunctions the indicator illuminates and stays on. We recommend that the system be checked by an authorized Kia dealer.
Kia Cee'd JD Service Manual: Curtain Airbag (CAB) Module Repair procedures
Removal
1.
Disconnect the battery negative cable and wait for at least thirty seconds
before beginning work.
2.
Remove the roof trim assembly.
(Refer to Body - "Roof trim assembly")
3.
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Kia Cee'd JD Service Manual: Ignition Coil Specifications
Specification
Item
Specification
Primary Coil Resistance (Ω)
0.75 ± 15% [20°C (68°F)]
Secondary Coil Resistance (kΩ)
5.9 [20°C (68°F)]
...