A8 Quattro Sedan V8-4.2L (ABZ) (1998)
Air Control Valve For Injectors: Testing and Inspection
Air Control Valve For Fuel Injectors, Electrical Testing
Air Control Valve For Fuel Injectors, Electrical Testing
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Disconnect harness connector from air control valve for fuel injectors -N212-.
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Connect multimeter US 1119 (Fluke 83 or equivalent) and check resistance across valve terminals.
Specified value: 15 - 35 ohms
If resistance is not OK:
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Replace air control valve for fuel injectors -N212-.
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Check readiness code. If DTC memory has been erased, generate new readiness code.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Code)/Checking, Readiness Code" See: Testing and Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Code)/Generating, Readiness Code" See: Testing and Inspection
Checking voltage supply
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Fuse for air control valve for fuel injectors -N212- OK (E-box in plenum)
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Disconnect harness connector from air control valve for fuel injectors -N212-.
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Connect VAG1527B LED voltage tester between connector terminal 1 and Ground.
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Switch ignition on.
LED must light up
If LED does not light:
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Check wiring for open circuit between connector terminal 1, fuse for air control valve for fuel injectors -N212- (E-box in plenum), and Motronic
ECM power supply relay.