Idle Speed

NOTE: Because idle speed is ECU controlled through the idle speed control (ISC) valve, checking and adjustment is not normally required. If rough idling occurs, adjust with this procedure.

PREPARATION

Tach Connection:

1. Warm engine to operating temperature.
2. Run engine at idle. Place gear selector in "P" (A/T) or neutral (M/T). Set steering wheel straight ahead, turn off all electrical loads, and wait for electric cooling fan to stop.
3. Connect tachometer to diagnosis connector terminal EG-.

ADJUSTMENT

Throttle Adjusting Screw:

1. Connect SST's (System Selector 49 B019 9A0 and Self Diagnosis Checker 49 H018 9A1) to diagnosis connector. Set switch "A" to position "1" and Test Switch to "SELF TEST."

NOTE: If SST is not used, install jumper wire between TEN and GND terminals of diagnosis connector.

2. Verify idle speed:

Idle Speed: 700 - 750 rpm

3. If not within specification, adjust with air adjusting screw (AAS).
4. If not within specification when AAS is fully closed, loosen locknut and turn throttle adjusting screw (TAS) to set idle.
5. Tighten locknut and put paint mark on nut and throttle body.
6. Disconnect SST or remove jumper wire.