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Home >> Porsche >> 2018 >> Macan Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 386 (Fuel Tank & Lines - INGENIUM I4 2.0L Petrol -- Discovery Sport/L550) >> Fuel Tank And Lines - INGENIUM I4 2.0L Petrol >> Diagnosis And Testing >> Fuel Tank And Lines >> Inspection And Verification

Inspection And Verification

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
  • Wait at least 30 seconds after the engine stops before commencing any repair to the high-pressure fuel injection system. Failure to follow this instruction may result in personal injury
  • Place the vehicle in a well ventilated, quarantined, area and arrange "No Smoking/Fuel Fumes" signs about the vehicle
  • Before any work is carried out on the fuel system, ground the vehicle to earth and maintain the ground connection until the work is complete
  • Do not perform any repairs to the high pressure fuel system while the engine is running. The fuel pressure can be extremely high. Failure to follow this instruction may result in personal injury.
  • Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable vapors are always present and may ignite. Failure to follow these instructions may result in personal injury
  • After carrying out repairs, the fuel system must be checked visually for leaks. Failure to follow these instructions may result in personal injury
  • If fuel is taken internally, DO NOT  induce vomiting. Seek immediate medical attention. Failure to follow this instruction may result in personal injury.
  • If fuel contacts the eyes, flush the eyes with cold water or eyewash solution and seek medical attention. Failure to follow this instruction may result in personal injury.
  • Wash hands thoroughly after handling, as prolonged contact may cause irritation. Should irritation develop, seek medical attention. Failure to follow this instruction may result in personal injury.
  • This procedure involves fuel handling. Be prepared for fuel spillage at all times and always observe fuel handling precautions. Failure to follow these instructions may result in personal injury.
CAUTION:
  • Diagnosis by substitution from a donor vehicle is NOT  acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.
  • It is essential that absolute cleanliness is observed when working with these components. Always install blanking plugs to any open orifices or lines. Failure to follow this instruction may result in damage to the vehicle.
  • Make sure that the workshop area in which the vehicle is being worked on is as clean and dust-free as possible. Areas in which work on clutches, brakes or where welding or machining are carried out are not suitable in view of the risk of contamination to the fuel system. Failure to follow this instruction may result in damage to the vehicle.
  • Make sure that any protective clothing worn is clean and made from lint-free non-flocking material. Failure to follow this instruction may result in damage to the vehicle.
  • Make sure that clean, non-plated tools are used. Clean tools using a new brush that will not lose it's bristles and fresh cleaning fluid prior to starting work on the vehicle. Failure to follow this instruction may result in damage to the vehicle.
  • Use a steel-topped work bench and cover it with clean, lint-free, non-flocking material. Failure to follow this instruction may result in damage to the vehicle.
  • Before disconnecting any part of the system, it is imperative that all dust, dirt and debris is removed from around components to prevent ingress of foreign matter into the fuel system. Failure to follow this instruction may result in damage to the vehicle.
NOTE:
  • If a control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual, or determine if any prior approval program is in operation, prior to the installation of a new module/component.
  • When performing voltage or resistance tests, always use a digital multimeter accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance always take the resistance of the digital multimeter leads into account.
  • Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
  • When measuring fuel sender resistance values with a multimeter, it is critical to use the correct multimeter setting. The multimeter should not be on the 'Auto' setting and must  be set to 'Manual'. This will help prevent incorrect diagnosis and unnecessary replacement of fuel senders. If the multimeter range is set at 'Auto' then, during a sweep of the sender from 50 Ohms to 998 Ohms, the multimeter has to change its measurement range. For approximately 1 second, during the range switch over point, the multimeter display indicates an open circuit. This can lead to a mis-diagnosis of a fuel sender fault.
  1. Verify the customer concern
  2. Visually inspect for obvious signs of damage and system integrity

    VISUAL INSPECTION CHART 

    MECHANICAL ELECTRICAL
    • Fuel level
    • Fuel leaks
    • Fuel pipes and hoses
    • Fuel contamination/grade/quality
    • Fuel tank filler pipe cap
    • Fuel tank filler pipe
    • Fuses
    • Wiring harnesses and connectors
    • Powertrain control module
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
  4. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index
  5. Check DDW for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and carry out the recommendations as required