Checking Residual Pressure (9-3)

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. See Fig 1 .
Remove the engine cover.
Unscrew the valve cap from the fuel rail's service nipple. Connect Fuel and Oil Pressure Gauge Equipment (83 93 852) and Fuel Pressure Gauge Adapter (83 94 744). Connect with the adapter "safety on". Take off the "safety" from the adapter. See Fig 2 .
Run the pump with the diagnostic tool until the pressure gauge no longer rises. The residual pressure after 20 minutes should be at least 33 psi (2.3 bar).
Take a pressure reading.
"Safety on" the adapter and remove the pressure gauge equipment from the fuel rail service nipple. Screw on the valve cap. See Fig 3 .
Fit the engine cover.

Fig 1: Checking Residual Pressure (9-3 - 1 Of 3)

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Fig 2: Checking Residual Pressure (9-3 - 2 Of 3)

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Fig 3: Checking Residual Pressure (9-3 - 3 Of 3)

Courtesy of SAAB-SCANIA OF AMERICA, INC.