Component Inspection

Check ECTS

IG "OFF" and disconnect ECTS connector.

Measure resistance between terminals 1 and 3 of ECTS connector. (Component side)

SPECIFICATION :

TEMPERATURE AND RESISTANCE SPECIFICATION

Temp. (°C/°F)	Resistance (kΩ)	Temp. (°C/°F)	Resistance (kΩ)
-40 (-40)	48.14	40 (104)	1.15
-20 (-4)	14.13 ~ 16.83	60 (140)	0.59
0 (32)	5.79	80 (176)	0.32
20 (68)	2.31 ~ 2.59

Is the measured resistance within specification?

YES

Go to 2 "Check PCM" as follows.

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. IG "OFF" and connect scantool.
2. Connect probe to terminal 3 of ECTS harness connector.
3. IG "ON" and ENG "OFF" and simulation Function on scantool.
4. Simulate voltage at terminal 3 of ECTS harness connector.
  
  Fig 1: Diagnosis Function Screen Display - Coolant
  Courtesy of HYUNDAI MOTOR CO.
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.
NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.

NOTE: Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.