Cabrio L4-2.0L (ABA) (1996)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
NOTES
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Idle Speed, Ignition Timing And CO Content Not Adjustable.
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The Idle Speed Is Regulated By The Throttle Valve Control Module.
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The Position Of The Distributor Has No Influence On Ignition Timing.
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The CO Content Is Held To Specification By The Oxygen Sensor Control.
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Malfunctions In Oxygen Sensor Control Will Be Detected By On Board Diagnostic (OBD) And Stored In Diagnostic Trouble Code (DTC)
Memory.
Special Tools, Testers And Auxiliary Items
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VAG 1551 scan tool with VAG 1551/3 adapter cable
Test Conditions
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No malfunctions stored in DTC memory, see Function 02.
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Engine oil temperature minimum 80°C (176°F)
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Electrical consumers switched off (Radiator coolant fan must not run during the check).
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A/C switched off
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Exhaust system must be free of leaks.
Test Sequence
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Engine running at idle
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Connect VAG 1551/1552 scan tool and select "Engine Electronics" address word 01.
Indicated On Display
Rapid data transfer HELP
Select function XX
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Press buttons -0- and -4-to select "Basic Setting" function 04 and press -Q- button to confirm input.
Indicated on display
Basic Setting HELP
Input display group number XXX
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Press buttons -0-, -0- and -1- to input display group 001 and press -Q- button to confirm input.
Indicated on display (1-4 Display fields).
System in Basic Setting 1 -->
1 2 3 4
NOTE: In "Basic Setting" function O4 the Evaporative Emission canister purge regulator valve -N80- is closed.
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Do not continue with check until engine temperature exceeds 80°C (176°F) (display field 2).
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Briefly increase engine speed (rev-up) and then allow engine to run at idle speed for 2 minutes.
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Check specifications (display fields 1-4).