A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
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Operate the starter briefly.
Specified value: battery voltage.
If the specified value was not obtained:
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Using a multimeter, check the electrical harness connector terminal 1 for voltage.
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Operate the starter briefly.
Specified value: battery voltage.
If the specified value is not obtained:
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Check the wiring connection from the electrical harness connector terminal 1 to the Engine Component Power Supply Relay ( J757) terminal 4 for
an open circuit.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the wiring connection.
If the specified value was obtained:
Check Ground (GND) activation