Idle Air Control Inspection

Engine coolant temperature compensation Inspection




1. Connect the SST (NGS tester) to DLC-2.
2. Select the PID/DATA MONITOR AND RECORD function on the NGS display.

3. Select the following PIDs.
- ECT
- IACV
- RPM

4. Verify that the engine is in cold condition, then start the engine.

5. Verify that the engine speed decreases as the engine warms up.
- If the engine speed does not decrease or decreases slowly, carry out the following:
- ECT sensor inspection
- IAC valve inspection