A4 Sedan L4-1.8L Turbo (AWM) (2001)
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Read Diagnostic Trouble Code (DTC) memory of engine control module.
If a DTC relating to the Charge Air Pressure sensor -G31- is displayed:
Checking power supply
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Disconnect connector -arrow- on charge pressure sender.
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Connect multimeter between contacts 1 and 3 of connector to measure voltage.
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Switch ignition on.
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Specified value: approximately 5 Volts
If specified value is not attained:
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Connect VAG 1598/31 test box to wiring harness leading to engine control module; engine control module must also be connected.