New Beetle L4-1.8L Turbo (AWP) (2003)
Idle Speed: Testing and Inspection
Idle Speed, Checking
NOTE:
-
Idle speed, ignition timing and CO content not adjustable.
-
The idle speed is regulated to specification by the throttle valve positioner in conjunction with the DIS function.
-
CO content regulated by oxygen sensor control. Malfunctions in oxygen sensor control are detected in On Board Diagnostic (OBD) and stored in
DTC memory.
Special tools, test equipment and auxiliary items
-
VAG 1551 scan tool or VAG 1552 mobile scan tool with VAG 1551/3B cable
Test conditions
-
Exhaust system between Three Way Catalytic Converter (TWC) and cylinder head must be free of leaks
-
All electrical accessories, e.g. lights and rear window defroster must be switched off
-
If the vehicle is equipped with air conditioning, it must be turned off
-
On vehicles with automatic transmission selector lever in "P" or "N" position
-
Engine Coolant Temperature (ECT) must be at least 80 °C, see display group 04, display zone 3
-
Intake air temperature less than 60 °C, see display group 04, display zone 4
Test sequence
-
Connect VAG 1551 scan tool ((VAG 1552). Start engine and select "Address word" 01 of Motronic Engine Control Module (ECM) -J220-.
Engine must be running at idle speed. Connecting scan tool and selecting Motronic Engine Control Module (ECM) -J220-. See: Computers and
Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan
Tool/Connecting VAG 1551 Scan Tool
-
Check DTC Memory, if necessary, repair any malfunctions and then Erase DTC Memory, Checking and Erasing DTC Memory. See: Computers
and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
-
Read readiness code. If DTC memory has been erased or Motronic Engine Control Module (ECM) -J220- was disconnected from battery positive,
readiness code must be generated again.
See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
-
Leave VAG 1551 scan tool connected.
-
Continue running engine at idle speed.
Indicated on display
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -4- for function "Basic Setting" and confirm entry with -Q- button.
Indicated on display
Basic setting
Input display group number XXX
-
Press buttons -0-, -0- and -1- for "Display group number 1" and confirm entry with -Q- button.
Indicated on display (1 to 4 = Display zones)
System in basic setting 1
->
1
2
3
4
-
Check adjustment conditions for basic setting in display zone 4.
Specification: 1x111111
Significance of the numbers
NOTE: In the "System in basic setting" function the EVAP canister purge regulator valve -N80- is closed and the air conditioner compressor
switched off.