TT Coupe L4-1.8L Turbo (ATC) (2001)
Basic Setting 56
->
1
2
3
4
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Check whether engine speed in display field 1 (actual engine speed) is within permitted tolerance range.
Display Group 56
NOTE:
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Engine speed in display field 1 (actual engine speed) is the current engine speed.
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Engine speed in display field 2 (specified engine speed) is a theoretical engine speed calculated by the ECM.
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At idle, the ECM always attempts to adapt the engine speed (actual) to the specified engine speed (specified).
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This means that the engine speed (actual) must always approximately match the engine speed (specified) at idle.
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Display fields 3 and 4 provide in formation, but are not relevant for checking idle speed.
If specified value is obtained:
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Press -> button.
Indicated on display (function selection):
Rapid data transfer
HELP
Select function XX
If specified value is not obtained:
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Check DTC memory again.
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If DTC memory was erased, readiness code must be re-generated.
If idle speed is too high or low and there are no DTCs in DTC memory, the following tests must be performed
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Un-metered air in intake air system, checking. Refer to "Intake Air System, Checking For Leaks (Un-Metered Air)", See: Powertrain
Management/Fuel Delivery and Air Induction/Testing and Inspection
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Check throttle valve control module.
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Evaporative Emission (EVAP) canister purge regulator valve always open, checking.
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Perform adaptation of throttle valve control module.
Significance of 5 digit display of display group 056