Idle Speed Inspection
NOTE:
- Before checking the idle speed, check these items:
- The malfunction indicator lamp (MIL) has not been reported on, and there are no DTCs.
- Ignition timing
- Spark plugs
- Air cleaner
- PCV system
- Apply the parking brake, and make sure the headlights are off.
- Disconnect the evaporative emission (EVAP) canister purge valve connector.
- Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
- Make sure the HDS communicates with the ECM/PCM. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
- Start the engine. Hold the engine speed at 3, 000 RPM without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
- Check the idle speed without load conditions: headlights, blower fan, radiator fan, and air conditioner off.IDLE SPEED SHOULD BE
J35Z6 engine 680 ± 50 RPM (in P or N) J37A4 engine (M/T) 750 ± 50 RPM (in neutral) J37A4 engine (A/T) 700 ± 50 RPM (in P or N) - Let the engine idle for 1 minute with high electric load (the A/C on, the temperature set to max cool, the blower fan on high, the headlights on high beam).IDLE SPEED SHOULD BE
J35Z6 engine 680 ± 50 RPM (in P or N) J37A4 engine (M/T) 750 ± 50 RPM (in neutral) J37A4 engine (A/T) 700 ± 50 RPM (in P or N) NOTE: If the idle speed is not within specification, do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ). If the idle speed is still not within specification, go to the symptom troubleshooting. - Reconnect the EVAP canister purge valve connector.