Jetta L4-1.8L Turbo (AWD) (2000)
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Idle Speed: Adjustments
Idle 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 and equipment
-
Scan tool VAG 1551 or vehicle system tester VAG 1552 with cable VAG 1551/3
Test conditions
-
No DTC stored in DTC memory
-
Coolant temperature must be at least 80 °C, See display group 04, display zone 3.
Work sequence
-
Connect scan tool VAG 1551 (VAG 1552). Start engine and select "Address word" 01 of engine control module. When doing this the engine must
be running at idling speed.
(Connecting scan tool and selecting engine control module). Refer to "VAG 1551 Scan Tool" See: 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 1 and 0 for the "Adaption" function and confirm input with the Q key.
Indicated on display:
Adaption
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
Adaption xxx ->
xxx rpm
xxx rpm Text Text
-
Change the specified speed in display zone 2 in jumps of 10 RPM with the following keys:
VAG 1551: keys 1 and 3
VAG 1552: keys up arrow and down arrow
Indicated on display:
Channel 1
Adaption xxx ->
xxx rpm
xxx rpm Text Text
NOTE: The idling speed must not be adjusted to outside the permissible idling speed range. The up-to-date figures for the idling speed can be
found in:
-
Confirm input by pressing Q key.
Indicated on display:
Channel 1
Adaption xxx
Q
Stored amended figure?
Indicated on display:
Channel 1
Adaption xxx ->
Amended figure is stored
