Checking Air Valve; Checking Pressure Switch (Safety Switch) - BMW 745i Repair Instructions

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Checking Air Valve
Detach hose (1 ).
INSTALLATION: Check hose clamps and hose for
proper fit.
Check that piston moves easily.
1 Housing
2 Housing cover
3
Gasket
4 Spring
5
Piston
6 Seal
- Checking Pressure Switch (Safety Switch)
Disconnect wire (1).
Connect an ohmmeter between connection on pres-
sure switch and ground.
Reading:
00
ohms.
Supply pressure to pressure switch.
Reading:
<
0.08 ohms.
INSTALLATION: Check hose (1) and hose clamp
for proper fit.