Low Fuel Pressure Sensor, Checking: Notes

Observe all safety precautions: SAFETY PRECAUTIONS .

View clean working conditions: CLEAN WORKING CONDITIONS .

Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.

For wiring diagrams, component locations, and connector views, Refer to the appropriate System Wiring Diagram.

Special tools and workshop equipment required 

• multimeter.
• Wiring diagram.

Test requirements 

• The Fuel Pump (FP) Control Module -J538- OK.
• The Engine Control Module - 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.

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.

Checking voltage 

-- Disconnect the Low Fuel Pressure Sensor -G410- electrical harness connector -1-.

-- Switch the ignition ON.

-- Using a Multimeter, check the Low Fuel Pressure Sensor -G410- electrical harness connector for voltage, between terminals 1 and 3.

Specified value: About 5.0 V.

-- Switch the ignition OFF.

-- Continue test according to the following table:

Value	Cause	Test
If the specified value was not obtained:	Open or shorted circuit	LOW FUEL PRESSURE SENSOR, CHECKING => Checking wiring
If the specified value was obtained:	Check reference signal circuit	LOW FUEL PRESSURE SENSOR, CHECKING => Checking wiring