A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Connect multimeter at valve for resistance measurement.
Specified value: 25 to 35 Ohms
If specified value is not obtained.
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Replace Wastegate Bypass Regulator Valve -N75-.
If specified value is obtained:
Checking voltage supply
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Connect multimeter between terminal 1 and 2 for voltage measurement.
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Operate starter briefly.
Specified value: approx. battery voltage
If there is no voltage:
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Connect multimeter for voltage measurement as follows:
Harness connector Terminal
Measure to
1
Engine Ground (GND)
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Operate starter briefly.
Specified value: approx. battery voltage
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Switch ignition off.
If there is no voltage again:
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Check wire connection from harness connector terminal 1 to Fuel Pump (FP) Relay -J17- via fuse for open circuit according to wiring diagram.
Specified value: Wire resistance max 1.5 Ohms
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If necessary, repair wire connection.
If voltage supply is OK:
Check Ground (GND) activation