Idling Speed, Adaptation
In exceptional circumstances e.g. customer complaints concerning droning noises, vibrations at idling speeds, it is permitted to adjust the idling speed slightly. But ensure, that the idling speed is not outside the range printed in the Exhaust emissions test binder, (if the speed is outside the tolerance range it is possible that the vehicle will fail the next exhaust emissions test).
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
- VAG1551 scan tool or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3
Test conditions
- No fault stored in DTC memory
- Coolant temperature must be at least 80 °C, See display group 04, display zone 3.
Work sequence
- Connect VAG1551 scan tool (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit. When doing this the engine must be running at idling speed. (Connecting scan tool and selecting engine control unit.) Testing and Inspection
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press keys 1 and 0 for the "Adaptation" function and confirm input with the Q key.
Indicated on display:
Adaptation
Feed in channel number XX
- Press keys 0 and 1 for channel number 1 and confirm input with the Q key.
Indicated on display:
Channel 1 Adaptation xxx ->
xxx rpm xxx rpm Text Text
- Change the specified speed in display zone 2 in jumps of 10 rpm with the following keys: V.A.G 1551: keys 1 and 3 V.A.G 1552: keys up�arrow and down arrow
Indicated on display:
Channel 1 Adaptation xxx ->
xxx rpm xxx rpm Text Text
NOTES: The idling speed must not be adjusted to outside the permissible idling speed range.
- Confirm input by pressing Q
Indicated on display:
Channel 1 Adaptation xxx Q
Store amended figure?
- Confirm entry by pressing Q
Indicated on display:
Channel 1 Adaptation xxx ->
Amended figure is stored
- Conclude adaptation by pressing button.
- Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
- Switch off ignition.