|
|
MPI - On-vehicle Service 13A-127 4. If not within the standard value, loosen the throttle position sensor mounting bolts. Then rotate the sensor body to adjust. 5. Turn the ignition switch to “LOCK” (OFF) position. 6. Remove the MUT-II. If the MUT-II is not used, remove the special tool, and then connect the throttle position sensor connector. 7. If a diagnosis code is displayed, erase the diagnosis code by using the MUT-II or disconnect the negative battery cable from the battery terminal and then leave it for at least ten seconds. After that, reconnect the battery cable, and then let the engine run at idle for approximately 10 minutes. BASIC IDLE SPEED ADJUSTMENT NOTE (1) The basic idling speed has been adjusted by the speed adjusting screw by the manufacturer, and there should usually be no need for readjustment. (2) If the adjustment has been changed by mistake, the idle speed may become too high or the idle speed may drop too low when loads from components such as the A/C are placed on the engine. If this occurs, adjust by the following procedure. (3) The adjustment, if made, should be made after first confirming that the spark plugs, the injectors, the idle speed control servo, the compression pressure, etc., are all normal. 1. Before inspection and adjustment, set the vehicle to the pre-inspection condition. 2. Connect the MUT-II to the diagnosis connector (16-pin). NOTE When the MUT-II is connected, the diagnosis control terminal should be earthed. 3. Start the engine and run at idle. 4. Select the item No. 30 of the MUT-II Actuator test. NOTE This holds the idle speed control servo at the basic step to adjust the basic idle speed. 5. Check the basic idle speed. Standard value: 850 ± 100 r/min (1) The engine speed may be 20 to 100 r/min lower than indicated above for a new vehicle [driven approximately 500 km or less], but no adjustment is necessary. (2) If the engine stalls or the engine speed is low even though the vehicle has been driven approximately 500 km or more, it is probable that deposits are adhered to the throttle valve, so clean it. (Refer to P.13A-126.) |