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.
2008 Kia Optima L4-2.4LFACTORY OEM SERVICE PROCEDURE
ICM (Integrated Circuit Module) Relay Box
INSPECTION
HAZARD LAMP RELAY
Check for continuity between the terminals.
1. There should be continuity between the No.14 and No.15 terminals when power and ground are connected to the No.5 and No.15 terminals in the ICM relay B connector.
2. There should be no continuity between the No14 and No.15 terminals when power is disconnected.
BURGLAR ALARM HORN
Check for continuity between the terminals.
1. There should be continuity between the No.11 and No.12 terminals when power and ground are connected to the No.4 and No.11 terminals in the ICM relay B connector.
2. There should be no continuity between the No.11 and No.12 terminals when power is disconnected.
BURGLAR ALARM
Check for continuity between the terminals.
1. There should be no continuity between the No.9 and No.10 terminals when power and ground are connected to the No.1 and No.9 terminals in the ICM relay B connector.
2. There should be continuity between the No.9 and No.10 terminals when power is disconnected.
RAIN SENSOR
Check for continuity between the terminals.
1. There should be continuity between the No.9 and No.10 terminals when power and ground are connected to the No.1 and No.4 terminals in the ICM relay A connector.
2. There should be continuity between the No.9 and No.10 terminals when power is disconnected.
ADJUST PEDAL
Check for continuity between the terminals.
1. There should be continuity between the No.5 and No.12 terminals when power and ground are connected to the No.6 and No.12 terminals in the ICM relay A connector.
2. There should be no continuity between the No.5 and No.12 terminals when power and ground are disconnected.
SEAT WARMER
Check for continuity between the terminals.
1. There should be continuity between the No.7 and No.17 terminals when power and ground are connected to the No.14 and No.15 terminals in the ICM relay A connector.
2. There should be no continuity between the No.7 and No.17 terminals when power and ground are disconnected.
WIPER DEICER RELAY
Check for continuity between the terminals.
1. There should be continuity between the No.8 and No.18 terminals when power and ground are connected to the No.8 and No.9 terminals in the ICM relay A connector.
2. There should be no continuity between the No.8 and No.18 terminals when power and ground are disconnected.
REAR FOG RELAY
Check for continuity between the terminals.
1. There should be continuity between the No.2 and No.18 terminals when power and ground are connected to the No.17 and No.18 terminals in the ICM relay A connector.
2. There should be no continuity between the No.2 and No.18 terminals when power and ground are disconnected.
Factory Service Tools
Use the Manual With the Right Hardware
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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.