Passat Sedan V6-2792cc 28L DOHC (AAA) SFI (1997) | Mass Air Flow Sensor Diagrams | Page 633
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Connect VAG 1598/18 test box to ECM wiring harness (arrow).
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Check wiring between test box and 4-pin connector for open circuit according to wiring diagram.
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Terminal 2 and test box socket 16.
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Terminal 4 and test box socket 17.
Resistance: max. 1.5 ohms.
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Additionally, check 4-pin connector terminals for short circuit to one another.
Terminal 4 and test box socket 16.
Specification: infinite ohms .
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Set multimeter to voltage measurement range.
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Check 4-pin connector terminals for short circuit to battery positive (B+) according to wiring diagram.
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Terminal 2 and vehicle Ground (GND).
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Terminal 4 and vehicle Ground (GND).
Specification: 0 volts.
If no wiring malfunction is detected:
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Replace Mass Air Flow (MAF) sensor -G70-.
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Read the readiness code. If DTC memory has been erased, verify repair via appropriate display group, See Readiness code, creating. See:
Powertrain Management/Computers and Control Systems/Testing and Inspection
