A4 Sedan L4-2.0L Turbo (BPG) (2005)
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Using the Multimeter V.A.G. 1526 A or equivalent, check the electrical harness connector for voltage.
Harness connector terminal
Measure to
- 3 -
Engine Ground (GND)
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Operate the starter briefly.
Specified value: aprox. battery voltage.
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Switch the ignition off.
If the specified value was not obtained:
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Using the Multimeter V.A.G. 1526 A or equivalent, check electrical harness connector terminal - 3 - via Fuel Metering Valve N290 to Engine
Control Module (ECM) J623 for open circuit.
Specified value: Wire resistance max 1.5 Ohms.
If the specification is not obtained:
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Check the wiring for a short circuit to Battery positive (+) or an open circuit.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply was OK:
Checking output wiring
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Connect the test box 1598/42 to the wiring harness of the Engine Control Module (ECM) J623. The ECM is not connected.
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Using the Multimeter V.A.G. 1526 A or equivalent, check the following wire connections for an open circuit.
Harness connector terminal
Test box Socket
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