Idle Speed: Adjustments

NOTE:
- Before the Idle Speed Setting, check the following items:
The Malfunction Indicator Lamp (MIL) has not been reported on.
Ignition Timing.
Spark Plugs.
Air Cleaner.
Positive Crankcase Ventilation (PCV) System.

- Canada: Pull the Parking Brake Lever up. Start the Engine, then check that the Headlights are off.

1. Connect a Tachometer.
2. Start the Engine. Hold the Engine at 3,000 rpm with no load (Automatic Transmission in N or P position, Manual Transmission in neutral) until the Radiator Fan comes on, then let it idle.

Idle Air Control Valve:

3. Disconnect the 2 P Connector from the Idle Air Control (IAC) Valve.
4. Start the Engine with the Accelerator Pedal slightly depressed. Stabilize the rpm at 1 000, then slowly release the Pedal until the Engine idles.
5. Check idling in no-load conditions: Headlights, Blower Fan, Rear Defogger, Radiator Fan, and Air Conditioner are not operating. Adjust the Idle Speed, if necessary, by turning the Idle Adjusting Screw.

Idle Speed:
M/T 420 ± 50 rpm.
A/T 420 ± 50 rpm. (in N or P position).

Idle Adjusting Screw:

NOTE: After adjusting the Idle Speed in this step, recheck the Ignition Timing. If it is out of specification, go back to step 4.

6. Turn the Ignition Switch "OFF".
7. Reconnect the 2 P connector on the IAC Valve, then remove the BACK-UP (7.5 A) fuse in the under-hood Fuse/Relay Box for 10 seconds to reset the Engine Control Module (ECM).
8. Restart and idle the Engine with no-load conditions for one minute, the check the Idle Speed.

Idle Speed: 700 ± 50 rpm.


9. Idle the Engine for one minute with Headlights (Low) "ON" and check the Idle Speed.

Idle Speed: 750 ± 50 rpm.

10. Turn the Headlights off. Idle the Engine for one minute with Heater Fan Switch at "HI" and Air Conditioner on, then check the Idle Speed.

Idle Speed: 810 ± 50 rpm.

NOTE: If the Idle Speed is not within specification, see Testing and Inspection/Idle Control System.