A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
Air Flow Meter/Sensor: Testing and Inspection
With Generic Scan Tool
Mass Air Flow (MAF) Sensor -G70-, Checking
Recommended special tools and equipment
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V.A.G1526A hand multimeter
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V.A.G1594A connector test kit
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V.A.G1598/31 test box
Test requirements:
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Fuse for Mass Air Flow (MAF) sensor OK
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Ground (GND) connections at engine and transmission OK
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Fuel Pump (FP) Relay OK; checking. See: Fuel Delivery and Air Induction/Fuel Pump/Fuel Pump Relay/Testing and Inspection/With Generic
Scan Tool
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Parking brake engaged.
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Vehicles with automatic transmission: Selector lever in position "P" or "N".
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Electrical consumers switched off (radiator fan must NOT run during test).
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A/C switched off.
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Coolant temperature at least 80 degrees C see "Mode 1: Check measuring values "; "PID 05: Coolant temperature". See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Mode 1: Check Measured Values
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Ignition switched off.
NOTE:
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Voltage is supplied to Mass Air Flow (MAF) sensor from Fuel Pump (FP) relay.
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Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) sensor.
Checking function
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Connect diagnostic tester. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool
Testing/With Generic Scan Tool/Scan Tool Connecting/Connect Diagnostic Tester
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Start engine and let run at idle.