5 Series E60 520d (N47) SAL
If the current for the reference leak measurement is outside a certain tolerance, the DMTL
will be detected as faulty and the fault memory entry shown in Table 3 will be stored in the
DME as an internal DMTL fault.
DME variant
Manufacturer
Fault in plain text
MS43
Siemens
142 "Module fault DMTL"
MS45
Siemens
27CD "Module fault DMTL"
MSV70
Siemens
2A17 "DMTL system fault"
MSV80
Siemens
2A17 "DMTL system fault"
MSD80
Siemens
2A17 "DMTL system fault"
ME9.2.2
Bosch
2A17 "DMTL system fault"
MED9.2.2
Bosch
2A17 "DMTL system fault"
ME9.2.3
Bosch
2A17 "DMTL system fault"
MSS65
Siemens / BMW
2776 "DMTL pump"
Table 3: Internal DMTL fault during reference leak measurement
2.1.2 Tank leak measurement
Fig. 1 shows the components of the fuel supply system, to which pressure is applied.
Pressure is applied to the components of the fuel supply system during the tank leak
measurement procedure.
•
The internal solenoid valve in the DMTL (14, Fig. 1) closes the line to the atmosphere
•
The DMTL pump is activated
As a result, the fuel supply system is now a closed system (from the DMTL valve up to the
fuel evaporation control valve) and the pressure is increased in the entire fuel system.
During the tank leak measurement,the pump's current draw is measured. An algorithm in
the DME control unit compares the power intake of the reference leak measurement and of
the tank leak measurement.
If the current draw during the tank leak measurement is lower that that recorded during the
reference leak measurement, the fuel supply system is detected as free of leaks. A leak of
> 0.5 mm must be present for the DME to store a fault.
DME variant
(engine)
Minor leak error
> 0.5 mm
(fault in plain text)
Major leak error
> 1,0 mm
(fault in plain text)
MS43
8F "Fuel tank leak diagnosis with DMTL"
MS45
27CC "DMTL: leak
MSV70
2A16 "Extremely minor leak"
2A15 "Minor leak"
MSV80
2A16 "Extremely minor leak"
2A15 "Minor leak"
MSD80
2A16 "Extremely minor leak"
2A15 "Minor leak"
ME9.2.2
2A16 "Extremely minor leak"
2A15 "Minor leak"
MED9.2.2
2A16 "Extremely minor leak"
2A15 "Minor leak"
ME9.2.3
2A16 "Extremely minor leak"
2A15 "Minor leak"
SI Diagnosis of fuel tank systems with fuel tank leak diagnosis module (DMTL) All U
BMW AG - TIS
23.01.2013 15:32
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 4 -
