Golf GL L4-2.0L (AEG) (2001)
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Connect multimeter to measure voltage on harness connector terminal -2- and engine Ground (GND).
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Start engine and run at idle.
Specified value: 11.0-15.0 V
If no voltage is present:
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Turn off ignition.
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Check wire between 5-pin harness connector terminal 2 and Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
If the voltage supply and wiring is OK:
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Connect multimeter to measure voltage on harness connector terminal -4- and engine Ground (GND).
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Turn on ignition.
Specified value: min. 4.5 V
If no voltage is present:
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Turn off ignition.
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Check signal and Ground (GND) wires.
Testing signal and Ground (GND) wires for Mass Air Flow (MAP) sensor
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Remove wiper arms and plenum chamber cover.