Passat Wagon L4-1781cc 1.8L Turbo (AEB) (1998)
Idle Speed: Testing and Inspection
Idle Speed, Adaptation
NOTE: Under exceptional circumstances e.g. customer complaints such as droning noises, vibrations during idle, etc. it is permitted to slightly adjust
the idle speed. You must first ensure, however; that the idle speed is not outside of it's specified range. If it is outside the tolerance range, it is also
possible that the vehicle could fail the next emissions test.
Special tools, testers, measuring instruments and auxiliary items required:
-
VAG 1551/1552 Scan Tool with VAG 1551/3 adaptor cable
Test conditions:
-
No DTC's stored in DTC memory
-
Engine Coolant Temperature must be 85 °C minimum
See Display group 04, Display zone 3
Work sequence:
-
Connect VAG 1551/1552 Scan Tool
-
Start engine and let idle
-
Press 0 and 1 buttons to select "Address word" 01
"Engine electronics"
Display will appear as shown
Rapid data transfer
HELP
Select function XX
-
Press 1 and 1 buttons to select "Login procedure"
-
Press Q button to enter input
Display will appear as shown
Login procedure
HELP
Input code number XXXXX
-
Press 0, 1, 2, 8 and 3 buttons to select Login code 01283
-
Press Q button to enter input
Display will appear as shown
Data transfer fault
-
Switch OFF ignition and repeat procedure.
Display will appear as shown
Rapid data transfer
HELP
Select function XX
-
Press buttons 1 and 0 for the "Adaptation" function
-
Press Q button to enter input
Display will appear as shown
Adaptation
Feed in channel number XX
-
Press 0 and 1 buttons to select channel 1
-
Press Q button to enter input
Display will appear as shown
Channel 1
Adaptation xxx
->
xxx rpm
x.xx ms
x km/h
idling
-
Change the specified speed in steps of 10 rpm with the following buttons: