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Fig. 95: Identifying Scan Tool Display - Checking For Unmetered Air Leaks (3 Of 3) z Check whether Engine Coolant Temperature (ECT) is above 80 °C in display zone 2. z Observe engine speed in display zone 1 and oxygen sensor control before Three Way Catalytic Converter DISPLAY GROUP 1: IDLING TEST z Systematically spray parts of intake system with engine leak detector spray. If the engine speed drops or the oxygen sensor control changes: z Press --> button. z Press buttons -0- and -6- for function "End output" and confirm entry with -Q- button.
Display zones 1 2 3 4 Display group 1: Idling test xxxx RPM xxx.x °C xx.x % xxxxxx Indicated Engine speed (in steps of 40) Engine Coolant Temperature (ECT) Oxygen sensor control before Three Way Catalytic Converter (TWC) Adjustment conditions for basic setting Working 0 to 6800 RPM -48.0 to 143.05C -10.0 to 10.0% - Specification 760 to 810 RPM (1)
700 to 750 RPM (2) 80.0 to 115.05C The value must fluctuate by at least 2% in the -10.0 to 10.0% range - (1) Engine idling at normal operating temperature for manual transmission (2) Engine idling at normal operating temperature for automatic transmission
2003 Volkswagen New Beetle GLS 1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle
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