Idle Speed: Testing and Inspection

ENGINE TUNE-UP PREPARATION
1. Warm up the engine to normal operating temperature.
2. Shift the transaxle into neutral.
3. Turn off all electrical loads.
- Headlight switch
- Fan switch
- Rear window defroster switch
- A/C switch
4. Verify that the steering wheel is at straight ahead position.








5. Connect the Special Service Tool (SST) (NGS tester) to the DLC and select "PID DATA MONITOR AND RECORD".
6. Access RPM PID. Press the trigger key to enter this selection.
7. Wait until the electrical fan stops.


IDLE-UP SPEED INSPECTION
1. Perform "Engine Tune-up Preparation" above.
2. Connect the Special Service Tool (SST) (System selector) to the DLC.
3. Set switch A to position 1.
4. Set the test switch to SELF TEST.
5. Verify that the idle speed is normal.





6. Verify that the RPM PID is within the specification.
- If not as specified with all load conditions, inspect the IAC valve.
- If not as specified with some load condition, inspect the related input switches, harnesses, and connectors.