Fuel Pressure Sensor -G247-, CHECKING

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Pressure Sensor Tester: VAS6394
Pressure Sensor Tester - Adapter 2: VAS6394/2
Vehicle Diagnostic Tester - Test Adapter - 3 Pin: VAS5570
Torque Wrench 1331 5-50Nm: VAG1331
Vehicle Diagnostic Tester

Procedure:

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

CAUTION:

The fuel system is under pressure.

Risk of injury from fuel spraying out.

- Wear protective eyewear.

- Wear safety gloves.

- Reduce the pressure: place clean cloths around the connection point and carefully open the connection point.

-- Remove the Fuel Pressure Sensor -G247-. Refer to Fuel Pressure Sensor -G247-, REMOVING AND INSTALLING .

-- Install the : VAS6394/2 instead of the Fuel Pressure Sensor -G247-. Tighten to the tightening specification for the Fuel Pressure Sensor -G247-.

Fig 1: Identifying Adapter VAS 6394/2

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Open the plug -2- of the : VAS6394/1 . Install the removed Fuel Pressure Sensor -G247- in the opening and tighten to the tightening specification.

Fig 2: Identifying Locking Bolt, Pressure Sensor Tester And Fuel Pressure Sensor

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Use the : VAS5570 in order establish the connection between the vehicle and the Fuel Pressure Sensor -G247-.

Fig 3: Identifying Pressure Sensor Tester VAS 6394/1, Adapter VAS 6394/2 & Test Instrument Adapter/DSO (3-Pin) VAS 5570

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

For further work the engine must be started. For this reason the intake hose and air filter housing must be reinstalled.

-- Connect the Vehicle Diagnostic Tester.

-- Switch the ignition on.

-- Select "engine electronics" in OBD.

-- Select "measured values"

-- Select "fuel pressure" from the list.

The current value is displayed in the display field, which the Fuel Pressure Sensor -G247- reports to the engine control module.

-- Briefly press the button -A- once to turn on the : VAS6394/1 .

Fig 4: Identifying Button -A- On Pressure Sensor Tester - VAS 6394/1-

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

Pressing the -A- button for two seconds causes it illuminate for 20 seconds.

The : VAS6394/1 must display 0 bar; if this is not the case, then press button -C- one time quickly to set it back to zero.

-- Connect the : VAS6394/1 to the : VAS6394/2 .

Fig 5: Identifying Pressure Sensor Tester VAS 6394/1, Adapter VAS 6394/2 & Test Instrument Adapter/DSO (3-Pin) VAS 5570

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Start the engine.

-- Compare the pressure shown in the : VAS6394/1 with the actual value in the vehicle diagnostic tester.

The pressures may have a maximum difference of 5 bar (72.51 psi).

-- If the difference is greater than 5 bar (72.51 psi), test a new Fuel Pressure Sensor -G247-.

CAUTION:

The fuel system is under pressure.

Risk of injury from fuel spraying out.

- Wear protective eyewear.

- Wear safety gloves.

- Reduce the pressure: place clean cloths around the connection point and carefully open the connection point.

-- Insert the new Fuel Pressure Sensor -G247- in the : VAS6394/1 .

-- Repeat the test with the new Fuel Pressure Sensor -G247- and compare both values.

If the measured values now do not match again:

-- Check the wire connection between the Fuel Pressure Sensor -G247- and the engine control module. Refer to the appropriate Wiring Diagram.

If the measured values now match:

-- Install a new Fuel Pressure Sensor -G247-. Refer to Fuel Pressure Sensor -G247-, REMOVING AND INSTALLING .

Tightening Specifications

Refer to OVERVIEW - FUEL RAIL WITH FUEL INJECTORS