Test Procedure

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

Start diagnosis

-- Remove the engine covers. Refer to the appropriate service information.

-- Disconnect the Fuel Pressure Regulator Valve -N276- -13- electrical harness connector.

Fig 1: Identifying Fuel Rail And Injector Overview

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Checking internal resistance

-- Using a multimeter, Check the Fuel Pressure Regulator Valve -N276- terminals 1 to 2 for resistance.

Specified value: Near 4.1 Ω (at approx. 20° C)

If the specified value was Not obtained:

-- Replace the Fuel Pressure Regulator Valve -N276-. Refer to the appropriate service information

-- Go to Final Procedures

If the specified value was obtained:

Checking voltage

-- Switch the ignition ON.

-- Using a Multimeter, Check the Fuel Pressure Regulator Valve -N276- electrical harness connector terminal 2 to Ground (GND) for voltage.

Specified value: Battery voltage.

-- Switch the ignition Off.

If the specified value was Not obtained:

-- Check for an open circuit or a short circuit to Ground (GND) in the wiring from the Fuel Pressure Regulator Valve -N276- electrical harness connector terminal 2 to the 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 faulty wiring connection.

-- Repair the circuit and replace any open fuses.

-- Go to Final Procedures

If the specified value was obtained:

Checking wiring connections

-- Remove the Engine Control Module (ECM) - J623 -. Refer to appropriate service information.

-- Using a multimeter, Check the Fuel Metering Valve -N290- electrical harness connector terminal to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminal for resistance.

Fuel Pressure Regulator Valve -N276- electrical harness connector terminal	Engine Control Module (ECM) -J623- electrical connector T60 terminal
1	45

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring for an open circuit, a short circuit to each other, Battery voltage or Ground (GND).

-- If necessary, repair the faulty wiring connection.

If the specified value was obtained:

-- Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

-- Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to READINESS CODE .

-- End diagnosis.

If the DTC returns and no malfunction is found in the wiring and voltage supply was OK:

-- Remove the Engine Control Module (ECM) - J623 -. Refer to appropriate service information.