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.
- 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.
- Turn the ignition switch ON (II).
- Make sure the HDS communicates with the ECM/PCM. If it does not, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING (PART 2) ).
- Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or 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: 750±50 rpm (in Park or neutral)
- Let the engine idle for 1 minute with high electric load (A/C switch ON, temperature set to MAX Cool, blower fan on High, rear window defogger ON, and headlights on high beam).
Idle speed should be: 750±50 rpm (in Park or neutral)
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 symptom troubleshooting. - Reconnect the EVAP canister purge valve connector.