Fuel Pressure Sensor G247 , Checking

Fuel Pressure Sensor G247, Checking

Special tools, testers and auxiliary items required
- Multimeter.
- Wiring diagram.

Test requirements
- The Fuel Pump (FP) Control Module J538 OK.
- The Engine Control Module (ECM) J623 fuses OK.
- The fuel filter OK.
- The battery voltage at least 12.5 V.
- 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 the rear engine cover - arrows -.

Checking voltage







- Disconnect the 14 pin electrical harness connector - 3 - on the left rear side of the engine.
- Switch the ignition on.
- Using a Multimeter, check the Fuel Pressure Sensor G247 for voltage at the 14 pin electrical harness connector.

Fuel Pressure Sensor G247 electrical Specified
harness connector terminals value
1 to Battery positive (+) Battery voltage (+)
2 to Ground (GND) Battery voltage (+)
3 to Ground (GND) about 5 V

- Switch the ignition off.

If the specified values are obtained:
- Replace the Fuel Pressure Sensor G247.

If the specified values are not obtained:

Checking wiring
If the manufacturers test box is being used. Perform the following step.
- Install the test box.

If the manufacturers test box is not being used. Perform the following step.
- Remove the Engine Control Module (ECM) J623.
- Using a Multimeter, check the Fuel Pressure Sensor G247 electrical harness connector terminals to the Engine Control Module (ECM) J623 electrical harness connector T60 terminals for an open circuit.

14 pin electrical harness Engine Control Module (ECM)
connector terminals J623 electrical connector T60 terminals or test box socket
1 40
2 59
3 29

Specified value: 1.5 Ohms Max.

If the specification is not obtained:
- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
- Check the electrical harness connector for damage, corrosion, lose or broken terminals.
- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:
- Replace the Engine Control Module (ECM) J623.







- Install the rear engine cover - arrows -.

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

- End of diagnosis.