Golf GL L4-2.0L (AZG) (2001)
Idling
Part throttle
Wide open throttle
Overrun
must be attained several times.
-
At wide open throttle the speed must exceed 3500 RPM.
Engine Operating Mode Check
Engine Operating Mode, Checking
NOTE: Checks whether engine control module recognizes the engine operating modes idling, overrun, part throttle, enrichment, full throttle.
Special tools and equipment
-
V.A.G 1551 scan tool or 1552 scan tool with cable VAG 1551/3
Test conditions
-
Coolant temperature must be at least 80°C, See display group 04, display zone 3.
Test sequence
-
Connect V.A.G 1551 scan tool ((VAG1552). Start engine and select "Address word" 01 of engine control module. When doing this the engine
must be running at idling speed. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing
Diagnostic Trouble Codes/Scan Tool Connecting
Indicated on display:
Rapid data transfer
HELP
Select function XX
-
Press keys 0 and 8 for the function "Read measuring value block" and confirm entry with Q key.
Indicated on display:
Read measuring value block
Input display group number XXX
-
Press keys 0, 0 and 5 for "Display group number 5" and confirm entry with Q key.
Indicated on display: (1 to 4 = Display zones)
Read measuring value block 5
->
1
2
3
4
-
Check whether the control module recognizes the operating mode (display zone 4):
Idling:
As long as the engine is running at idling speed idling must be displayed
Display: Idling
Overrun mode:
-
Increase engine speed to above 3000 RPM.
-
Quickly release accelerator pedal.
As long as the engine speed is above 1400 RPM overrun must be displayed
Display: Overrun
NOTE: Below 1400 RPM idling speed will be recognized.
Part throttle:
-
Rev up evenly.
As long as the engine is being revved up evenly, part throttle must be displayed
Display: Part throttle.
Enrichment and full throttle:
-
Depress accelerator pedal completely (throttle burst)