Checking residual pressure (B235R, B205L/R)
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Checking residual pressure (B235R, B205L/R)
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Warning
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This check involves partial dismantling of the car's fuel system. The following points must therefore be observed in connection with the work:
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Work only in a well-ventilated area! If approved equipment for the extraction of fuel vapours is available, be sure to use it.
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Wear suitable gloves! Prolonged contact with fuel can cause skin irritation or dermatitis.
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Keep a class BE fire extinguisher close at hand! Beware of sparks caused by short circuits and when connecting and disconnecting leads in electrical circuits.
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No smoking anywhere in the vicinity.
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1.
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Reduce the fuel pressure by removing the fuel pump fuse no. 32 while the engine is idling. Turn off the ignition once the engine has stopped.
Fit the fuel pump fuse no. 32.
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2.
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Remove the engine cover.
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4.
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Run the pump with the diagnostic tool until the pressure gauge no longer rises. The residual pressure after
20 minutes
should be at least
2.3 bar (33 psi)
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5.
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Take a pressure reading.
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6.
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“Safety on“ the adapter and remove the pressure gauge equipment from the fuel rail service nipple. Screw on the valve cap.
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