Checking Charge Pressure - BMW 745i Repair Instructions

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- Checking Charge Pressure
The control pressure is checked at full throttle, while driving car or on a dynamometer test stand.
Since checking this pressure while driving the car requires a road speed above 100 km/h (60 mph) , it
is important to employ two persons for this test for safety's sake.
Connect pressure gauge 13 5 000 between the air
valve and collector.
When testing on a dynamometer test stand, connect
the BMW service test unit (10 bar/142 psi pressure
sensor) according to operating instructions.
Pull off hose and plug secondary ventilation system.
Place pressure gauge 135 000 in passenger compart·
ment (passenger's side).
Make sure hose is not clamped.
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