FlashMan ECM

Throttle body cleaning and idle relearn procedure

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Came across this info and figured it would help some of those with throttle body and idle issues.

SUBJECT: GM Drive by Wire Throttle Body Cleaning Procedure and Relearn Procedures
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I have been receiving a lot of calls at the Tech Support Line about proper throttle body cleaning procedures on various vehicles. Please find the first in a series of Manufacturer’s Recommended Procedures.
For the model year 2007, GM has 66 named vehicles, not including Isuzu, Saab, and Suzuki im- ports. There is no wonder there is confusion out there. While the cleaning procedure is pretty normal across the board with GM, there are 6 different relearn procedures listed, and a lot that require no relearn at all. Below is the procedure for cleaning. The following pages include a list by name of which proce- dures to use. This is a comprehensive list for the model year 2007. Older or newer vehicles could differ.
Throttle Body Cleaning
Important: Over extended time and mileage, deposits may accumulate on the back of the throttle valve plate. The source of the deposit is exhaust gas recirculation (EGR) gas. Typically these depos- its pose no problem. Occasionally the deposit may accumulate to a point where perceived pedal ef- fort or throttle valve movement is effected. This procedure should not be performed on vehicles with mileage under 80 450 km (50,000 mi).
1. Remove the air intake duct. Refer to Air Cleaner Inlet Duct Replacement .
Caution: Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury.
Notice: Do not insert any tools into the throttle body bore in order to avoid damage to the throttle valve plate.
2. Inspect the throttle body bore and the throttle valve plate for deposits. You will need to open the throttle valve in order to inspect all surfaces.
Notice: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.
3. Clean the throttle body bore and the throttle valve plate using a clean shop towel with ETech Chemicals ET110 Throttle Body Cleaner.
4. Install the air intake duct. Refer to Air Cleaner Inlet Duct Replacement.
5. Perform the Throttle Learn Procedure. Refer to Throttle Learn.

Car Name: G6
Vin 4th digit: Z
Procedure: 4

Procedure 4 Throttle/Idle Learn
Description
The engine control module (ECM) learns the idle position of the throttle plate to ensure the cor- rect 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.
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.

What is an OEM computer reflash?

Your car's computer software needs upgrades just as your PC or Mac software needs regular upgrades.

What can a reflash do? Auto Computer Reprogramming can sometimes fix transmission problems, improve gas mileage, etc.

Reflashing can also be used for:

Theft Deterrent Relearns

Service Engine Soon

False Trouble Codes

and Similar Issues.

Even the newest cars can usually benefit from a computer reflash.

Auto manufacturers are coming out with automobile updates every day. There may be a reprogram available for your vehicle.

Definitions

OEM: Original Equipment Manufacturer.

Reflash: term used in industry for "flashing" in new information upgrades to the computer.

Reprogram: Basically the same as "Reflash".

Computer module: An actual controller for a given part of the vehicle (example: PCM,TCM, etc).

Calibration id: process of checking with the car's manufacturer to determine the latest upgrades on your individual vehicle. Upgrades are determined not only by make, but also by VIN #.

2004 Ford F150

Battery Relearn Procedure

Because your vehicle’s engine is electronically controlled by a computer,
some control conditions are maintained by power from the battery. When
the battery is disconnected or a new battery is installed, the engine must
relearn its idle and fuel trim strategy for optimum driveability and
performance. Flexible fuel vehicles (FFV) must also relearn the ethanol
content of the fuel for optimum driveability and performance. To begin
this process:
1. With the vehicle at a complete stop, set the parking brake.
2. Put the gearshift in P (Park), turn off all accessories and start the
engine.
3. Run the engine until it reaches normal operating temperature.
4. Allow the engine to idle for at least one minute.
5. Turn the A/C on and allow the engine to idle for at least one minute.
6. Release the parking brake. With your foot on the brake pedal and with
the A/C on, put the vehicle in D (Drive) and allow the engine to idle for
at least one minute.
7. Drive the vehicle to complete the relearning process.
• The vehicle may need to be driven 10 miles (16 km) or more to
relearn the idle and fuel trim strategy along with the ethanol content
for flexible fuel vehicles.
• If you do not allow the engine to relearn its idle trim, the idle quality
of your vehicle may be adversely affected until the idle trim is
eventually relearned.
• For flexible fuel vehicles, if you are operating on E85, you may
experience poor starts or an inability to start the engine and
driveability problems until the fuel trim and ethanol content have been
relearned.

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