G5 L4-2.2L (2007)
Throttle Body: Procedures
Throttle Learn
Throttle Learn
Description
The engine control module (ECM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced,
the ECM must learn the new throttle position. The idle may be unstable or a DTC may set if the throttle position is not learned.
Conditions for Running the Throttle Learn Procedure
*
DTCs P0101, P0102, P0103, P0107, P0108, P0111, P0112, P0113, P0506, and P0507 are not set.
*
The engine speed is between 450-4,000 RPM.
*
The manifold absolute pressure (MAP) is greater than 5 kPa.
*
The mass air flow (MAF) is greater than 2 g/s.
*
The ignition 1 voltage is greater than 10 volts.
Throttle Learn
Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle. See: Computers and
Control Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions
1. Start and idle the engine in PARK for 3 minutes.
2. With a scan tool, monitor desired and actual RPM.
3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease.
4. Ignition OFF for 60 seconds.
5. Start and idle the engine in PARK for 3 minutes.
6. After the 3 minute run time the engine should be idling normal.
Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM
can continue to learn.
^
If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations
and extended idles.
7. After the drive cycle, the engine should be idling normally.
^
If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds and repeat step 6.
8. Once the engine speed has returned to normal, clear DTCs.
Throttle Body Cleaning
Throttle Body Cleaning
1. Remove the air cleaner outlet duct.
2. Inspect the throttle body bore and the throttle valve plate for deposits. You must open the throttle valve in order to inspect all of the surfaces.
Notice: Do not subject a throttle body assembly which contains the following components to an immersion cleaner or a strong solvent:
*
Throttle position (TP) sensor
*
Idle air control (IAC) valve
*
Sealed throttle shaft bearings
The cleaners will damage the electric components or sensors.
The cleaners will damage some of these components that contain seals or O-rings.
Solvents can wash away or break down the grease used on non-serviceable throttle shaft bearings.
Never use a wire brush or scraper to clean the throttle body. A wire brush or sharp tools may damage the throttle body components.