Inspection Procedure

Visual inspection

1. Check the coolant level.

Electric thermostat (ECT) check

1. Immerse thermostat in water heated to over 95°C (203°F), then heat for at least 3 minutes to check valve lift.
2. Check the valve opening temperature.
   • Specification:  Valve opening temperature: 100 ± 2°C (212±3.6°F)

   Full opening temperature: 113°C (235°F)

3. Check the valve lift.

   Valve lift: 8 mm (0.3150 in.) or more at 113°C (235°F)

Courtesy of KIA MOTORS AMERICA, INC.

Good 

• Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace ECM as necessary and Go to "VERIFICATION OF REPAIR " procedure.

No Good 

• Carefully re-do this troubleshooting guide steps.
• Replace or repair the Electric Thermostat (ECT) and go to "VEHICLE S/W MANAGEMENT " procedure.
• After performing "Vehicle S/W Management", Go to "VERIFICATION OF REPAIR " procedure.