RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Fuel Distributor: Testing and Inspection
Fuel Metering Valve 2, Checking
Fuel Metering Valve 2, Checking
Special tools, testers and auxiliary items required
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Multimeter.
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Wiring diagram.
Test requirements
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The Fuel Pump (FP) Control Module J538 OK.
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The Engine Component Power Supply Relay J757 OK.
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The Fuse S282 OK.
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The fuel filter OK.
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The parking brake engaged.
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The battery voltage at least 12.5 V.
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The selector lever of automatic transmission in position "P" or "N".
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All electrical consumers switched off (radiator fan must NOT run during test).
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A/C switched off.
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The fuel tank at least 1 / 4 filled.
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The ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Initial Inspection
and Diagnostic Overview/General Diagnosis
Start diagnosis
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Disconnect the Fuel Metering Valve 2 N402 electrical harness connector - arrow -.
Checking internal resistance
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Using a Multimeter , check the Fuel Metering Valve 2 N402 terminals for resistance
Specified value: 450 to 1000 Ohms.
If the specified value was not obtained:
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Replace the High Pressure Fuel Pump.
