Passat Sedan V6-2792cc 2.8L DOHC (AAA) (1995)
Idle Speed: Testing and Inspection
REQUIREMENTS
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Engine Oil Temperature 80°C (176°) minimum.
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All electrical consumers switched OFF. Coolant Fan (radiator fan) must not run during check.
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Air conditioner switched OFF.
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Exhaust system must be free of leaks.
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VAG 1551 Scan Tool (ST) connected.
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No malfunctions stored in Diagnostic Trouble Code (DTC) Memory.
PROCEDURE
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Start engine and let idle.
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Operate Scan Tool while observing display.
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Press button -1- for "Rapid data transfer" operating mode.
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Press buttons -0- and -1- to enter address word 01 for "Engine Electronics."
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Press -Q- button to confirm input.
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Press --> button.
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Press buttons -0- and -4- to select the "Basic Setting" function.
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Press -Q- button to confirm input.
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Indicated on display
Start basic setting
HELP
Input display group number XX
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Press buttons -0- and -1- to select display group number 1.
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Press -Q- button to confirm input.
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Indicated on display (1 - 4 = display fields)
System in basic setting 2
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1 2 3 4
NOTE: In the "Basic Setting" function, the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) is closed.
CAUTION Do not continue until engine temperature exceeds 80°C (176°), read in display field 2.
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Briefly raise engine speed, then allow engine to run at idle for at least 2 minutes.
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Read engine speed and ignition timing data:
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Display field 1 = Engine speed
Specification: 650-750 RPM
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Display field 4 = Ignition timing
Specification: 6° BTDC (fluctuating)
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Press --> button.
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Press buttons -0- and -6- to select the "End Output" function.
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Press -Q- button to confirm input.
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If engine speed RPM specifications are not obtained:
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Switch ignition OFF.
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Check accelerator pedal mechanism for ease of operation.
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Check throttle closing damper and adjust if necessary.