System Inspection

Coolant Level Inspection
1. Check the cooling system coolant level.
2. Is the coolant in the reservoir at the proper level?
  YES
  - Go to next step as below.
  NO
  - Repair or add engine coolant as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Thermostat Inspection
1. Check if the thermostat bypass valve is stuck in the open position or if the correct type of thermostat was installed. Replace thermostat as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
2. Check the valve opening temperature of the thermostat.
  Specification(Valve opening temperature) : 80~84°C(176~183°F)
3. If the opening temperature is not as specified, Replace thermostat as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  If OK, go to next step as below.

ECT Sensor Inspection

Ignition "OFF"
Disconnect ECTS connector.

Measure the resistance between signal terminal and ground terminal of ECTS connector. (Component side)

TERMINAL RESISTANCE SPECIFICATION

Temp.(°C)	Temp.(°F)	Resistance(kΩ)
-20	-4	14.1 ~ 16.8
0	32	Approx. 5.8
20	68	2.3 ~ 2.6
40	104	Approx. 1.2
60	140	Approx. 0.6
80	176	Approx. 0.3

Fig 1: Measuring Resistance Between ECTS Connector Signal And Ground Terminal

Courtesy of KIA MOTORS AMERICA, INC.

Is resistance within the specification?
YES
- Go to next step as below.
NO
- Check ECTS for contamination, deterioration, or damage. Substitute with a known-good ECTS and check for proper operation. If the problem is corrected, replace ECTS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.