Fuel Pressure Sensor G247 , Checking

Fuel Pressure Sensor G247, Checking

Special tools, testers and auxiliary items required
- Multimeter V.A.G 1526 or equivalent.
- Test Box 105 Pin VAG1598/42.
- Adapter Lead Vag1598/39 VAG1598/39.
- Adapter cable V.A.G 1598/39-1.

Test requirements
- Fuel Pump (FP) Control Module J538 OK.
- The fuses for the engine electronics OK.
- The fuel filter OK.
- The parking brake engaged.
- The battery voltage at least 12.5 V.
- The selector lever of automatic transmission in position "P" or "N".
- All electrical consumers switched off (radiator fan must NOT run during test).
- A/C switched off.
- The fuel tank at least 1 / 4 filled.
- The ignition switched off.

Procedure







- Remove engine cover - arrows -.

Checking voltage







- Disconnect the electrical harness connector - 3 - for the Fuel Pressure Sensor G247.
- Switch the ignition on.







- Using the Multimeter V.A.G. 1526 A or equivalent, check the Fuel Pressure Sensor G247 electrical harness connector for voltage.

Electrical harness connector Terminal Specified value
1 to Battery positive (+) Battery positive (+)
2 to Ground (GND) Battery positive (+)
3 to Ground (GND) about 5 V

- Switch the ignition off.

If specified value is obtained:

- Replace the Fuel Pressure Sensor G247

If the specified value was not obtained:

Checking wiring connections

- Connect the test box 1598/42 to the wiring harness of the Engine Control Module (ECM) J623 . The ECM is not connected.







- Using the Test Box 105 Pin VAG1598/42 and Multimeter V.A.G 1526 A or equivalent, check the following wiring connection for an open circuit.


Electrical harness connector Terminal Test box socket
1 14
2 25
3 26

Specified resistance 1.5 Ohms max.

If the specification is not obtained:
- Check the wiring for a short circuit to Battery positive (+) or an open circuit.
- If necessary, repair the wiring connection.

If no malfunctions are found in the wiring:
- Replace the Engine Control Module (ECM) J623.

Assembly is performed in the reverse order of removal.

Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory.
2. If necessary, erase the DTC memory.
3. If the DTC memory was erased, generate readiness code.

- End diagnosis and switch the ignition off.