Idle Speed/Throttle Actuator - Electronic: Service and Repair

REMOVAL PROCEDURE

IMPORTANT: The hardware used to attach the Throttle Position (TP) sensor and Idle Air Control (IAC) valve is coated with thread-locking adhesive. If these pants are removed for service, inspect the attaching screw threads. There should be enough thread-locking material (adhesive or compound) on the threads to insure proper re-locking. If not, clean the threads and apply Loctite(R) 262, GM Part No. 1052624, or equivalent, to the threads before re-assembly.

Description:

1. Disconnect the IAC electrical connector (1) from the IAC valve (8).

Description:

2. Remove the two IAC valve attaching screws (4) from the IAC valve (1).
3. Remove the IAC valve (1) from the throttle body.
4. Remove the IAC valve O-ring from the IAC valve.

INSTALLATION PROCEDURE

NOTE: 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 compressing the pintle until the extension is less than 28 mm (1-1/8 in).

Description:

1. Install the new IAC O-ring.

NOTE: Refer to the Fastener Notice in Service Precautions.

2. Install the IAC valve (1) to the throttle body and tighten the screws (4).

Tighten
Tighten the screws to 3 N.m (27 lb in).

Description:

3. Connect the IAC valve electrical connector (1) to the IAC valve (8).