Base Idle Speed

NOTE:
1. The standard idle speed has been adjusted, by the engine speed adjusting screw (SAS), by the manufacturer, and there should usually be no need for readjustment.
2. In case the adjustment is disturbed or when the idle speed is too high or it drops owing to application of air conditioning load, make adjustment by the procedure described below.
3. The adjustment, if made, should be made after first confirming that the spark plugs, the injectors, the idle air control motor, the compression pressure, etc., are all normal.
(1) The vehicle should be prepared as follows before the inspection and adjustment.
- Engine coolant temperature: 80-95°C (176-203°F)
- Lights, cooling fan and accessories: OFF
- Transaxle: Neutral (A/T for P range)
(2) Connect the scan tool to the data link connector (white).

NOTE: When the scan tool is connected, the diagnostic test mode control terminal should be grounded.

If not using the scan tool, proceed as follows:




a. Insert a paper clip into the i-pin blue connector as shown in the illustration.




b. Connect a primary-voltage-detecting tachometer to the paper clip.




c. Use the special tool (diagnostic trouble code check harness) to connect the diagnostic test mode control terminal (terminal No. 1) of the 16-pin data link connector to ground.




(3) Remove the waterproof female connector from the ignition timing adjustment connector.
(4) Use a jumper wire to ground the ignition timing adjustment terminal.
(5) Start the engine and run at idle.
(6) Check the basic idle speed.

Standard value: 750 ± 50 r/min.

NOTE:
1. The engine speed may be 20 to 100 r/min. lower than indicated above for a new vehicle [driven approximately 500 km (300 miles) or less], but no adjustment is necessary.
2. If the engine stalls or the r/min. is low even though the vehicle has been driven approximately 500 km (300 miles) or more, it is probable that deposits are adhered to the throttle valve, so clean it.




(7) If not within the standard value range, turn the engine speed adjusting screw (SAS) to make the necessary adjustment.

NOTE: If the idling speed is higher than the standard value range even when the engine speed adjusting screw is fully closed, check whether or not there is any indication that the fixed SAS has been moved. If there is an indication that it has been moved, adjust the fixed SAS. If there are no indications that it has been moved, it is possible that there is leakage as a result of deterioration of the fast idle air valve (FIAV), and, if so the throttle body should be replaced.

(8) Switch OFF the ignition switch.
(9) If the scan tool was not used, disconnect the jumper wire from the diagnostic test mode control terminals.
(10) Disconnect the jumper wire from the ignition timing adjustment terminal and return the connector to its original condition.
(11) Start the engine again and let it run at idle speed for about ten minutes; check to be sure that the idling condition is normal.