- Disconnect the negative battery cable. To remove the IAC valve, first disconnect
the negative battery cable, then the IAC wire harness plug
Next, remove the two IAC valve attaching bolts . . .
. . . and pull the valve from the intake manifold
- Disengage the wiring harness connector from the IAC valve.
- Remove the two retaining screws, then remove the IAC valve and discard the
old gasket.
To install: When installing the valve, always discard the
old gasket and install it using a new one
- Clean the IAC valve mounting surface on the throttle body of old gasket
material.
- Using a new gasket, position the IAC valve on the throttle body. Install
and tighten the retaining screws to 71–106 inch lbs. (8–12 Nm).
- Attach the wiring harness connector to the IAC valve.
- Connect the negative battery cable.
NOTE: The Idle Air Control (IAC) valve is an integral component
of the Bypass Air Control (BAC) valve.
- Disconnect the negative battery cable.
- Disconnect the water hoses (if equipped) and air hose from the BAC/IAC valve.
| Fig. 1: Removal of the BAC/IAC valve assembly — 3.0L
engine shown
|
- Disengage the wiring harness connector from the BAC/IAC valve.
- Remove the mounting fasteners from the valve assembly.
- Remove the BAC/IAC valve assembly, along with the mounting gasket and O-ring
from the vehicle.
To install:
- Remove any foreign material from the contact surface.
- Install the BAC/IAC valve assembly, with a new mounting gasket and O-ring,
onto the engine in correct position.
- Install and tighten the mounting fasteners to 14–18 ft. lbs. (19–25
Nm) on 3.0L engines, and 22–30 inch lbs. (2.5–3.4 Nm) on 2.6L
engines.
- Plug in the valve wiring harness connector.
- Connect the air hose and water hoses (if equipped) to the valve assembly.
- Connect the negative battery cable.
- If equipped with water hoses, verify that the valve assembly does not leak.
