Component Inspection

Check ECTS

Ignition "OFF"
Disconnet ECT sensor connector.

Measure resistance between terminals "1" and "3" of the ECT sensor connector.

Specification: (error range is 2~3%.)

RESISTANCE SPECIFICATION

Temperature (°C/°F)	-40 (-40°F)	-30 (-22 °F)	-20 (-4 °F)	0 (32 °F)	20 (68°F)	80 (176°F)	100 (212 °F)	110 (230 °F)	120 (248°F)
Resistance (kΩ)	26.74	15.48	5.79	2.45	1.148	0.587	0.322	0.188	0.147
Voltage (V)	4.39	4.17	3.48	2.46	1.68	1.04	0.63	0.39	0.31

Is the measured resistance within specifications ?
Yes
- Go to "Check PCM" as below.
NO
- Check ECT sensor for contamination, deterioration, or damage. Substitute with a known-good ECT sensor and check for proper operation. If the problem is corrected, replace ECT sensor and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check PCM
1. Ignition "OFF"
2. Connect scantool and Ignition "ON"
3. Select simulation function on scantool.
4. Simulate voltage at terminal "3" of ECT sensor signal connector.
  
  Fig 1: Simulate Voltage At Terminal "3" Of ECT Sensor Signal Connector
  Courtesy of KIA MOTORS AMERICA, INC.
5. Does the signal value of ECT sensor change according to simulation voltage ?
  Yes
  - Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known - good PCM and check for proper operation.
    If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.