RS 6 V8-4.2L Turbo (BCY) (2003)
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Specification: approx. battery voltage
NOTE: Engine control module Ground is applied to contact 3 of connector.
If reading does not match specification:
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Check wiring
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Connect multimeter for voltage measurement between contacts 4 and 3 of connector.
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Switch on ignition.
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Specification: approx. 5 V
If reading does not match specification:
Checking wiring for mass air flow sensor
NOTE: Signal wire is also checked as part of wiring test.
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Connect test box V.A.G 1598/31 at wiring harness to engine control module. Actual engine control module is not to be connected. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Connecting and Initial
Checks/Wiring And Component Check Using Test Box V.A.G 1598/31
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Check for open circuit and short to Ground/positive in the following wiring:
Connector
Test box V.A.G 1598/31
Contact
Socket
3
27
4
53
5(signal)
109
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Eliminate open circuit in wiring/short circuit if necessary.
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Also check all wires for mutual short circuit.
If no fault is found in wiring:
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Replace Mass Air Flow (MAF) sensor 2 - G246-.