Basic Idle Speed Adjustments

1. The vehicle should be prepared as follows before the inspection and adjustment.
- Engine coolant temperature: 85 - 95°C (185 - 205°F)
- Lights, electric cooling fan and accessdries: OFF
- Transaxle: Neutral (Park for vehicles with an automatic transaxle)





2. Slacken the accelerator cable enough.
3. Connect the scan tool to the data link connector.
4. If the scan tool is not used, follow the steps below.





- Insert a paper clip (from the harness side) into the 3-pin connector shown in the figure at the left. Take care not to disconnect the connector.





- Connect a primary-Voltage-detection type of tachometer to the paper clip.

5. Switch ON the ignition switch (but do not start the engine) and leave as if for 15 seconds or longer.





NOTE: When the ignition switch is switched ON, the idle speed control plunger extends to the fast-idle opening degree, and. after 15 seconds have passed, contracts to the initial position and stops there.

Initial position: the suitable idling position at which the idle speed control motor position sensor output Voltage is 0.9V.

6. Switch OFF the ignition switch.
7. Disconnect the connector of the Idle-Speed Control (ISC) Motor, and then secure the ISC motor at the initial position.
8. Sufficiently loosen the fixed Speed Adjusting Screw (SAS).
9. Start the engine and let it idle.
10. Check the basic idling speed.
If the scan tool is used, select No.22 and then read the idling speed.

Basic idling speed: 700 ± 50 rpm

NOTE: The engine speed may be 20 to 100 rpm lower than indicated above for a new vehicle [driven approximately 500 km (300 miles) or less], but no adjustment is necessary. If the engine stalls or the rpm 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, clean it.





11. If there is a deviation from the standard value, turn the engine speed adjusting screw to make the adjustment.

NOTE: When the engine speed adjusting screw is turned to make the adjustment, use a hexagonal wrench if possible, and, in order to prevent backlash of the screw, make the final adjustment at the tightening side.

12. Tighten the fixed SAS until the engine speed increases; then return the fixed SAS to find the point (the "touch point") at which the engine speed does not decrease. Then, from that point, return the fixed SAS and additional one-half turn.
13. Switch OFF the ignition switch.
14. Adjust the play of the accelerator cable.
15. Connect the idle-speed control motor's connector.
16. Adjust the throttle-position sensor.
17. 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.