Engine coolant temperature compensation inspection

Connect the M-MDS to the DLC-2.
Select the following PIDs: (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .)
- ECT
- IAT
- RPM
Verify that the engine is cold, then start the engine.
Verify that the engine speed decreases as the engine warms up.
- If the engine speed does not decrease or decreases slowly, inspect the following:
  - ECT sensor No. 1 and related wiring harness (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.5] .)
  - Throttle body and related wiring harness (See THROTTLE BODY INSPECTION [SKYACTIV-G 2.5] .)

RELATED PID SPECIFICATIONS

Item (definition)	Unit/Condition	Definition	Condition/Specification (Reference)
ECT	°C, °F	Engine coolant temperature (No. 1)	Displays ECT
ECT	V	Engine coolant temperature (No. 1)	ECT is 20 °C {68 °F}: Approx. 3.10 V ECT is 40 °C {104 °F}: Approx. 2.16 V ECT is 60 °C {140 °F}: Approx. 1.40 V ECT is 80 °C {176 °F}: Approx. 0.87 V ECT is 100 °C {212 °F}: Approx. 0.54 V
IAT	°C, °F	Intake air temperature (No. 1)	Displays IAT (No. 1)
IAT	V	Intake air temperature (No. 1)	IAT is 20 °C {68 °F}: Approx. 2.70 V IAT is 40 °C {104 °F}: Approx. 1.80 V IAT is 60 °C {140 °F}: Approx. 1.20 V
RPM	RPM	Engine speed	Displays engine speed