A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Connect multimeter between terminal 1 and 3 of harness connector for voltage measurement.
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Switch ignition on.
Specified value: about 5 V
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Switch ignition off.
If specified value is not obtained:
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Connect test box to wiring harness of Engine Control Module (ECM). ECM is not connected. See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Scan Tool Connecting/Test Box, Connecting For
Wiring and Component Test
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Check the following wire connections for open circuit and short circuit to Ground (GND) and B+:
Harness connector Terminal
Test box Socket
1
108
3
98
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Repair open circuit in wiring or short circuit if necessary.
If specified value is obtained:
Checking signal wire
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Connect harness connector at charge air pressure sensor.
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Connect multimeter to socket 101 and socket 108 of test box for voltage measurement.
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Start engine and let run at idle.
Specified value: about 1.90 V
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Bring engine to RPM by depressing pedal suddenly.
Specified value: 2.00 to 3.00 V
If specified values are not obtained:
