S4 V8-4.2L (BHF) (2004)
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Disconnect electrical harness connector -3- from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- (item -2-).
NOTE:
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Depicted in illustration with air filter cover removed.
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Disregard the other items.
Checking internal resistance
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Connect multimeter at valve for resistance measurement.
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Specified value: 22 to 30 ohm
If specified value is not obtained.
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Replace Evaporative Emission (EVAP) canister purge regulator valve -N80-.
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.
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Specified value: approx. battery voltage
If there is no voltage.
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Connect multimeter for voltage measurement as follows.
Harness connector
Measure to