Control Module Wires, Checking

-- Disconnect 4-pin connector from Charge Air Pressure Sensor -G31- with Intake Air Temperature (IAT) Sensor -G42- (-A-).

Fig 1: Identifying Connector For Intake Air Temperature (IAT) Sensor G42 And Mass Air Flow (MAF) Sensor G70

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect test box (VAG1598/42) to Engine Control Module (ECM) -J623- wiring harness using adapter cable (VAG1598/39-2), connecting test box for wiring test.

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

Fig 2: Identifying 4 Pin Harness Connector & Terminals

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Terminal 3 + socket 62

Terminal 4 + socket 78

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 Charge Air Pressure Sensor -G31- with Intake Air Temperature (IAT) Sensor -G42-.

-- Erase DTC memory of Engine Control Module (ECM) DIAGNOSTIC MODE 04 - ERASE DTC MEMORY , Diagnostic mode 4: Reset/erase diagnostic data.

-- Generate readiness code READINESS CODE .