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Component Inspection

Check ECTS

IG "OFF" and disconnect ECTS connector.

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

SPECIFICATION:

RESISTANCE SPECIFICATION CHART

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 " 2Check 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: Scan Tool 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.
Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.