G-scan 2 Learn Crankshaft Position Variation for Chevrolet Impala 2010

This article show you the guide on how to use G-Scan 2 diagnostic tool do crankshaft position variation learn for Chevrolet for Chevrolet Impala 2010.And if you want to know more G-scan 2 test report,check here:G-scan2 test projects.

 

Procedures:

Connect G-scan 2 diagnostic tool Chevrolet Impala by OBD port,then select [DIAGNOSIS]

Select [GM USA]

Select [Automatic selection]

After vehicle identification,it will show the information as below,if the VIN information is correct,select [OK] to continue

It will search system automatically,please wait

After then it will show you the system,and the star sign is mean special function

Here we select [Engine Control Module]

Select [Special Function]

Select [Crankshaft Pos. Variation Learn]

Accelerate to WOT.

Release throttle when fuel cutoff occurs

Refer to service manual for more information.

RPM value for fuel cutoff:

Psgr.Cars:

L4 3970 RPM

V6 5150 RPM

V8 4000 RPM

 

Lduty Trucks:

L4 3970 RPM

V6 4000 RPM

V8 4000 RPM

Press [Enter] to continue

Engine should not accelerate beyond calibrated RPM value.

Release throttle immediately if value is exceeded.

Refer to service manual for help

Press [ENTER] to continue

Block drive wheels

Set parking brake (Do not apply brake pedal)

Cycle ignition from off to on

Press [Enter] to continue

Apply and hold brake pedal

Start and idle engine.

Turn A/C off

Vehicle must remain in Park or Neutral

The ECT sensor must read Coolant Temperature 75℃ or higher

Press [Next] to continue

Let’s go back to data analysis to check the ECT value

Select [Data Analysis],and select [Engine data] and click OK

If you look at ECT sensor,it’s over 75 degree Clelsius.

So we back the crankshaft position variation learn

Press [Next]

Note:

-Slowly accelerate engine speed to 5150 RPM

Procedure successful

Press [OK] to next