Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK

Start diagnosis

-- Remove the engine cover with air filter. Refer to the Repair Information.

Checking internal resistance

-- Disconnect the Wastegate Bypass Regulator Valve -N75- electrical harness connector -1-.

Fig 1: Disconnecting Turbocharger Recirculating Valve N249 Electrical Harness Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Using a multimeter, check the Wastegate Bypass Regulator Valve -N75- terminals 1 to 2 for resistance.

Specified value: 20 to 30 Ω (at approx. 20°C)

If the specified value was Not obtained:

-- Replace the Wastegate Bypass Regulator Valve -N75-. Refer to the Repair Information.

If the specified value was obtained:

Checking Voltage supply

-- Start the engine.

-- Using a multimeter, check the Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal 1 to engine ground.

Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal:	Measure to:
1	Engine Ground

Specified value: Battery voltage.

-- Switch the ignition OFF.

If the specified value was Not obtained:

-- Check the wiring for a short circuit to ground, high resistance or an open circuit to Fuse (Refer to applicable wiring diagram for fuse positions).

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the wiring connection.

If the specified value was obtained:

-- Remove the Engine Control Module -J623-.

-- Using a multimeter, check the Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal to the Engine Control Module -J623- electrical harness connector T60 for an open circuit.

Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal:	Engine Control Module -J623- electrical connector T60 terminal:
2	3

Specified value: 1.5 Ω max.

If the specified value was Not obtained:

-- Check the wiring for an open or high resistance.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK:

-- Replace the Engine Control Module -J623-. Refer to the Repair Information.

-- Install the engine cover with air filter. Refer to the Repair Information.