Notice: If the IAC valve has been in service: DO NOT push or pull on the IAC
valve pintle. The force required to move the pintle may damage
the threads on the worm drive. Also, DO NOT soak the IAC valve in any liquid
cleaner or solvent, as damage may result.
- Clean
the IAC valve O-ring sealing surface, the pintle valve seat, and the air passage.
| • | Clean the IAC valve using GM cleaner P/N 1052626 or GM X 66A.
Use a shop towel or parts brush to remove heavy deposits. |
| • | If the air passage has heavy deposits, remove the throttle body
for complete cleaning. |
| • | Shiny spots on the pintle or seat are normal and do not indicate
misalignment or a bent pintle shaft. |
- Inspect the IAC valve O-ring for cuts, cracks, or distortion.
Replace the O-ring if the O-ring is damaged.
- Install the new idle air control valve O-ring.
Notice: The IAC valve may be damaged if installed with the cone (pintle) extended
more than 28 mm (1-1/8 in). Measure the distance that the valve
is extended before installing a new valve. The distance from the idle air
control valve motor housing to the end of the idle air control valve pintle
should be less than 28 mm (1-1/8 in). Manually compress the
pintle until the extension is less than 28 mm (1-1/8 in).
- Install the idle air control valve (1) into the throttle body.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the idle
air control valve attaching screws (2) into the IAC valve.
Tighten
Tighten the idle air control valve attaching screws to 3 N·m
(27 lb in).
- Install the electrical connector (1) into the idle air control valve
(4).
- The powertrain control module (PCM) will reset the idle air control
valve whenever the ignition switch is turned ON, then OFF.
- Turn the ignition switch ON.
- Turn the ignition switch OFF.
- Perform the IAC Valve learn procedure.
