A6 Quattro Sedan V6-3.0L (AVK) (2002)
If specified value is not obtained:
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Check wiring from terminal 2 on connector via fuse to fuel pump relay for open circuit or short to Ground:
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Repair any open/short circuit as necessary.
If specified value is obtained:
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Connect multimeter between terminals 2 and 3 to measure voltage.
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Operate starter briefly (engine may start).
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Specified value: approx. battery voltage
NOTE: Engine control module Ground is present at terminal 3 of the connector.
If specified value is not obtained:
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Check wiring connections.
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Connect multimeter between terminals 1 and 3 to measure voltage.
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Specified value: approx. 5 V
If specified value is not obtained:
Checking wiring to mass air flow (MAF) sensor
NOTE: The signal wire is also checked during the wiring check.
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Connect test box VAG 1598/31 to wiring harness for engine control module; do not connect engine control module. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring and
Component Testing Using VAG1598/31 Test Box
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Check for open circuit and short to positive or Ground in following wiring connections:
Connector
Test box VAG 1598/31
terminal
Socket
1
53
3
27
4
29
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Repair any open/short circuit as necessary.
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Check all wires for short to one another.
If no wiring malfunction is detected:
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Replace mass air flow (MAF) sensor -G70-.