See Figure 1
The air bypass solenoid or idle air control valve is used to control the engine idle speed. This component is operated by the electronic control module. The valve allows air to pass around the throttle plates in order to control cold engine idle and promote easier starting and dashpot operation.
- With the ignition in the ON position, use a multimeter and check for current at the valve. The meter should register approximately one volt.
- Connect a tachometer using the manufactures's instructions.
- With the engine running at normal operating temperature, apply 12 volts to the valve and watch the tachometer.
- If the bypass valve is functioning correctly, the idle speed will increase 700-1000 rpm. If the idle speed does not change, or increases less than 500 rpm, replace the bypass valve.
REMOVAL & INSTALLATION
See Figures 2, 3, 4, 5, 6 and 7
When the battery cable has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 10 miles (16 km) or more to relearn the adaptive strategy.
- Disconnect the negative battery cable.
- Access the idle air control valve on the side of the throttle body, and disconnect the wire harness attached to it.
- Remove the two Torx® bolts securing the bypass valve into position. Lift the valve off and remove the gasket from the base of the bypass valve. Clean any excess gasket material from both mating surfaces.
- Position a new gasket on the base of the bypass valve and attach to the throttle body using the two Torx® bolts. Tighten the bolts to 8-10 ft.lbs. (10-13 Nm).
- Fasten the wire harness to the bypass valve.
- Connect the negative battery cable.