Golf GTI L4-2.0L (ABA) (1997)
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Checking Load Registration Specifications 2 (display Field 3):
Evaluating Display Group 016: Display Field 3
Checking Voltage Supply
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Disconnect 4-pin connector from Mass Air Flow sensor.
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Connect multimeter with test leads from VW 1594 to measure voltage at terminals 1 and 3.
Specification: 9.0-14.5 volts
If no voltage is present:
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Switch ignition off.
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Check wiring according to wiring diagram.
Checking wiring
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Switch ignition off.
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Connect VAG 1598/18 test box to ECM wiring harness.