Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2015 Kia Optima SXFACTORY OEM SERVICE PROCEDURE

Measuring Resistance

Disconnect the cruise control switch connector from the control switch.

Fig 1: Cruise Control Switch With Connector End View
Courtesy of KIA MOTORS AMERICA, INC.

Measure resistance between terminals on the control switch when each function switch is ON (switch is depressed).

TERMINALS RESISTANCE REFERENCE CHART

Function switch	Terminal	Resistance
CANCEL	2 - 7	180Ω ± 5%
SET/-	2 - 7	330Ω ± 5%
RES/+	2 - 7	550Ω ± 5%
CRUISE	2 - 7	880Ω ± 5%

If not within specification, replace switch.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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