Checking Signal And Ground Wires Of Mass Air Flow (MAF) Sensor

-- Connect test box (VAG1598/42) to Engine Control Module 2 -J624- wiring harness using adapter cable (VAG1598/39-2), connecting test box for wiring test.

-- Check wires between test box and harness connector for open circuit in according to wiring diagram.

Fig 1: Identifying 5-Pin Electrical Harness Connector & Terminals

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Terminal 2+socket 18

Terminal 3 + socket 60

Terminal 4 + socket 40

Terminal 5 + socket 82

Wire resistance: max. 1.5Ω

-- Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.

Specified value: ∞ Ω

If no malfunctions are found in wires:

-- Replace Engine Control Module 2 -J624- ENGINE CONTROL MODULES, REPLACING .