Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Delivery, Checking
Special tools and workshop equipment required
- Hand held remote control (jumper).
- Multimeter.
- Electrical connector test lead set.
- Measuring container, fuel-resistant.
Test Conditions
- Battery voltage 12.5 V
- Fuel filter OK
- Fuel tank at least 1 /4 filled.
- Fuel pressure regulator OK.
- Fuel Pump (FP) Control Module --J538-- OK
- Ignition switched off.
Test Procedure
-- Perform a preliminary check to verify the customer's complaint. Refer to PRELIMINARY CHECK
-- Remove rear seat bench. Refer to BENCH SEAT .
-- Remove bolts -arrows- and remove cover for right locking flange.
-- Disconnect the electrical connector -arrow- at locking flange.
-- Connect a hand held remote control (jumper) using an adapter cable from the connector test set to contact 5.
-- Using insulating tape, tape over second contact of the remote control (jumper) to prevent a short circuit.
-- Route switch of the remote control (jumper) forward into the engine compartment.
-- Connect alligator clip to ground (GND) point in engine compartment.
-- Connect contact 1 to battery positive terminal (B+) using a self-made jumper cable. For safety reasons, install a 10 A fuse in the wiring.
-- Remove fuel filler cap from fuel filler tube.
-- Pull rear engine cover off -arrows-.
-- Pull resonator upward and unclip it.
Fuel system is under pressure! Before opening system, place rags around the connection area. Then release pressure by carefully loosening the connection.
-- Disconnect fuel line -arrow-.
-- Connect a pressure gauge adapter to the fuel line using the necessary adapters.
-- Connect assisting hose to pressure gauge and hold it in a measuring container.
-- Open shut-off valve of pressure gauge. Lever points in direction of flow.
-- Generate pressure in fuel system by pressing switch of remote control and slowly closing shut-off valve of pressure gauge.
- Specification: 4 bar positive pressure.
From this point on do not move position of shut-off tap.
-- Empty measuring container.
-- Press switch on remote control for 15 Sec.
-- Compare quantity of fuel delivered with minimum delivery rate in diagram (cm3 /15s).
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.