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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 >> Fuel tank leakage diagnosis module >> Structure and inner circuit

Structure and inner circuit

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The diagnosis module for tank leakage consists of an electrically driven overpressure pump (leakage diagnosis pump) as well as an electromagnetic changeover valve and reference bore hole. In addition, a heating element is integrated in the DMTL to remove any condensate that might be present.

Fig 1: DMTL Heater - Circuit Diagram
G09909671Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Changeover valve
2 Drive of the leak diagnosis pump
3 DMTL heater
PIN REFERENCE

Pin Explanation
Kl. 30B Terminal 30B, power supply
SIG1 Activation of changeover valve
SIG2 Actuation of leak diagnosis pump
SIG3 Activation of heater