Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Pull 5 pin connector -1- off Mass Air Flow (MAF) sensor (G70) arrow.
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Connect multimeter to measure voltage on connector contact 2 and engine Ground.
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Start engine and run at idle speed.
Specification: 11.0 - 15.0 V
If no voltage is present:
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Switch off ignition.
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Check wire between 5-pin connector contact 2 and fuel pump relay (J17) for open circuit using wiring diagram.
Wire resistance: max. 1.5 Ohms
If the voltage supply and wiring is OK: