Base Idle Speed
Basic System Adjustments/ Inspection Preparation1. Warm up the engine to normal operating temperature.
2. Turn all electric loads OFF.
3. Connect the special service tool, SST-49 B019 9A0 (System Selector), to the data link connector.
NOTE: If the SST is not used, ground the "TEN" terminal of the data link connector.
4. Connect a tachometer to the data link connector IG- terminal as shown.
Idle Speed Inspection/ Adjustment
Because the idle speed is controlled automatically by the powertrain control module engine (PCME), it is usually not necessary to check and adjust the idle speed control valve. However, if the engine is idling roughly, use the following procedure to make adjustments.
1. Perform "Preparation" steps 1 through 4.
2. Set SYSTEM SELECT to position 1
3. Set TEST SW to SELF TEST
4. With the coolant fan off, verify that the idle speed is within specification.
Idle speed: 700-750 rpm
5. If not within the specification, adjust the idle by turning the air-adjusting screw (AAS).
6. If not within the specification when air adjusting screw fully closed, loosen the locknut and turn the throttle adjusting screw to set the idle.
7. Tighten the locknut and put a paint mark on the nut and throttle body.
8. Disconnect the SST.