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Home >> BMW >> 2013 >> Z4 28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1445 (Functional Description - F10 - Engine Performance) >> Engine Performance - Functional Description >> Electric changeover valve, bypass flap, exhaust-gas recirculation cooler >> Structure and inner electrical connection

Structure and inner electrical connection

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Vacuum and ambient pressure are both present at the electro-pneumatic changeover valve. The engine control determines whether to relay system vacuum to the vacuum unit. There are only two working positions, on and off.

Fig 1: Electric Changeover Valve Exhaust Flap (Bypass Flap) - Circuit Diagram
G09908348Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Electric changeover valve, bypass flap
PIN REFERENCE

Pin Explanation
Terminal 15N Switch off terminal 15N with after-run, voltage supply
SIG Activation of electric changeover valve
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