Electronic Throttle Control System Inspection/Engine Coolant Temperature Compensation Inspection
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Connect the WDS or equivalent 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:
- ECT sensor and related wiring harness. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION .)
- Electronic throttle body and related wiring harness. (See THROTTLE BODY INSPECTION .)
- If the engine speed does not decrease or decreases slowly, inspect the following: