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Home >> Mazda >> 2000 >> Protege DX L4-1.6L DOHC >> Repair and Diagnosis >> Powertrain Management >> Tune-up and Engine Performance Checks >> Idle Speed >> Testing and Inspection
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Idle Speed: Testing and Inspection

ENGINE TUNE-UP [ZM]
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 SSTs (NGS tester) to the DLC-2 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 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.





Specification
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