Engine coolant temperature compensation inspection

Connect the M-MDS to the DLC-2.
Access 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:
  - CHT sensor and related wiring harness
    (See CYLINDER HEAD TEMPERATURE (CHT) SENSOR INSPECTION article.)
  - Electronic throttle body and related wiring harness
    (See THROTTLE BODY INSPECTION article.)