IDLE AIR CONTROL SYSTEM

F2-99prose procedure

Neutral (MTX) or P (ATX) for idle-speed check.

1
Warm up the engine to normal operating temperature.
2
Shift the selector lever to neutral (MTX) or P (ATX).
3
Turn all electric loads OFF.
4
Connect a tachometer to the data link connector terminal IG- as shown.
5
Verify that the coolant fan is turned off.
6
Verify that the idle speed is within the specification.
Idle speed (Neutral or P range): 640-700 rpm {670 ± 30 rpm}
7
If not within the specification, adjust the idle speed. (Refer to page F2-71.)
8
Verify that the idle speed is within the specification under the conditions below.
9
If not as specified, check the related wiring harness, switches and sensors.

Specification	Value
Idle speed (Neutral or P range)	640-700rpm {670 ± 30 rpm}

Idle speed (Neutral or P range)

640-700rpm {670 ± 30 rpm}

No load

Idle speed {rpm}640-700

Electrical load ON

Idle speed {rpm}640-700

Air Conditioner ON

Idle speed {rpm}720-780

P/S operating

Idle speed {rpm}640-700

BAC VALVE

1
Disconnect the idle air control valve connector.
2
Measure the resistance of the idle air control valve with an ohmmeter.
Resistance: 10.7-12.3 Ω (at 20°C {68°F})
3
If not as specified, replace the idle air control valve.

Specification	Value
Idle air control valve resistanceat 20°C {68°F}	10.7-12.3Ω

Idle air control valve resistanceat 20°C {68°F}

10.7-12.3Ω

(Refer to page F2-95.)