Component Inspection

Check ECTS

Ignition "OFF".
Disconnect ECTS connector.

Measure resistance between terminals 1 and 3 of the ECT sensor (to ECT sensor side).

Specification: Error range is 2~3%

ECTS SPECIFICATIONS

Temperature (°C/°F)	-30 (-22°F)	-20 (-4°F)	0 (32°F)	20 (68°F)	40 (104°F)	60 (140°F)	80 (176°F)	100 (222°F)	110 (230°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	2.56	1.68	1.04	0.63	0.39	0.31

Is the measured resistance within specifications?
YES
- Go to " 2 Check PCM" as below.
NO
- Substitute with a known-good ECTS and check for proper operation.
  If the problem is corrected, replace ECTS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check PCM.
1. Ignition "OFF".
2. Connect Scantool and Ignition "ON" & Engine "OFF".
3. Select simulation function on scantool.
4. Simulate voltage at terminal "1" of ECT sensor signal connector.
  
  Fig 1: Simulating Voltage At Terminal 1 Of ECT Sensor Signal Connector
  Courtesy of KIA MOTORS AMERICA, INC.
5. Does the signal value of ECT sensor changes 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.