| Vehicles with four-wheel drive: |
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| Unclip the retaining tabs -arrows- for the flange cover (left-side). |
| All vehicles (continued): |
Note | –
| Check that the seals under the fuel tank flanges are undamaged and that the locking rings on the flanges are properly tightened. Also check whether the fuel lines are connected properly. |
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| Perform a visual check on all pipe/hose connections of the fuel tank system and replace leaking pipes/hoses, e.g.: |
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| Line between activated charcoal filter and activated charcoal filter solenoid valve 1 -N80- |
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| Lines between activated charcoal filter and fuel system diagnostic pump -V144- |
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| Line between fuel tank and activated charcoal filter (below heat shield for activated charcoal filter). |
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| Fuel tank breather lines behind wheel housing liner (rear right). |
Note | Leaks in pipes and components of the fuel tank system can sometimes be detected by applying a non-flammable, environment-friendly leak detecting spray. Initiate a tank leak diagnosis repeatedly to build up pressure in the system. Bubbles will form at the leak. |
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| Perform a visual check on the components of the fuel tank system/fuel tank breather system: |
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| Activated charcoal filter |
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| Fuel system diagnostic pump -V144- |
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| Activated charcoal filter solenoid valve 1 -N80- |
Note | Due to the shape or function of these components it is not always possible to detect leaks by applying leak detecting spray. If this is the case, clamp off hoses going to the respective component using hose clamps up to Ø 25 mm -3094- and initiate tank leak diagnosis. If no leak is then found after clamping off the hoses, the corresponding component is defective. If the hoses are clamped off directly at the diagnostic pump and a leak is still indicated, there is a leak in the diagnostic pump itself. |
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