Computers and Control Systems: Adjustments
Fixed SAS Adjustment:
FIXED SPEED ADJUSTING SCREW (SAS) ADJUSTMENT
NOTES:
1. The fixed Speed Adjusting Screw (SAS) should not be moved unnecessarily; it has been precisely adjusted by the manufacturer.
2. If the adjustment for any reason is disturbed, readjust as follows.
1. Loosen the tension of the accelerator cable sufficiently.
2. Back out the fixed SAS lock nut.
3. Turn the fixed SAS counterclockwise until it is sufficiently backed out, and fully close the throttle valve.
4. Turn the fixed SAS clockwise until the throttle lever is touched (i.e., the point at which the throttle valve begins to open) is found. From that point, turn the fixed SAS clockwise another 1 1/4 turn.
5. While holding the fixed SAS so that it doesn't move, tighten the lock nut securely.
6. Adjust the tension of the accelerator cable.
7. Adjust the basic idle speed as directed below.
8. Adjust the closed throttle position switch and throttle position sensor.
BASIC IDLE SPEED ADJUSTMENT
NOTES:
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 a scan tool is not used, follow steps a-c:
Basic Idle Speed Adjustment:
a. Insert a paper clip into the 1-pin blue connector as shown in the illustration.
Basic Idle Speed Adjustment:
b. Connect a primary-voltage-detecting tachometer to the paper clip.
Basic Idle Speed Adjustment:
c. Use a special tool (diagnostic trouble code check harness) to ground the diagnostic test mode control terminal (terminal %) of the data link connector.
3. Remove the waterproof female connector from the ignition timing adjustment connector.
Basic Idle Speed Adjustment:
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 RPM
NOTES
1. 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.
2. 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, so clean it.
Basic Idle Speed Adjustment:
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