A6 Quattro Sedan V8-4.2L (ART) (2000)
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Connect multimeter (voltage measurement range) between sockets 3 and 4 of connector.
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Switch ignition on.
Specification: approx. 5 V
If the specification is not attained:
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Check wiring.
Checking wiring for Mass Air Flow (MAF) sensor
NOTE: The wiring test includes also testing the signal wire.
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Connect VAG 1598/31 test box to wiring harness for engine control module. DO NOT connect to the engine control module itself, Refer to "Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1598/31 Test Box" See: Powertrain Management/Computers and Control
Systems/Testing and Inspection
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Check for open circuit and short to B+ or Ground (GND) in the following wiring connections:
Connector for MAF
VAG 1598/31 test
sensor -G70, socket
box socket
3
27
4
53
5 (signal wire)
29
Resistance in wiring: max. 1.5 ohms
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Correct short circuit or open circuit if necessary.
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Also check for short circuits between all wires.
Connector for MAF
VAG 1598/31 test
sensor -G70, socket
box socket