Engine coolant temperature compensation inspection

Connect the M-MDS or equivalent to the DLC-2.
Select the following PIDs:
- 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 and related wiring harness
    (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION )
  - Throttle body and related wiring harness
    (See THROTTLE BODY INSPECTION )