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%

TEMPERATURE AND RESISTANCE REFERENCE CHART

Temperature (°C/°F)	-40/40	-30/-22	-20/-4	0/32	20/68	80/176	100/212	110/230	120/248
Resistance (kΩ)	45.3	25.6	15.1	5.8	2.5	0.33	0.19	0.16	0.13
Voltage (V)	4.48	4.34	4.12	3.46	2.57	0.64	0.39	0.34	0.27

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".
3. Select simulation function on scantool.
4. Simulate voltage at terminal 3 of ECT sensor signal connector.
  
  Fig 1: Screen Display - ECTS Voltage Simulation
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 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.