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2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 1
Vehicle: All Technical Service Bulletins
Hot Film Air Flow Sensor Related Fault Codes
Functional description of the hot film air flow sensor (component B2/5):
Upon engine start, a current is passed through the hot film air flow sensor, heating the sensor element (Figure 12) to a certain constant temperature.
As air passes through the sensor, this film is cooled and the sensor determines how much electricity is required to keep the film up to temperature.
This enables the sensor to determine how much air (in weight) is passing through the sensor at any given moment. It also recognizes the direction in
which the air is flowing it is able to take pulsation and backflows into account. This means that the hot film air flow sensor is able to measure the
actual air mass independent of pulsation and backflows. This signal is then sent to the ME9.7 engine control unit which it compares to a
preprogrammed map to deliver fuel and ignition spark, taking into account other engine inputs such as engine rpm and temperature. The hot film air
flow sensor HFM 6 transmits a frequency (HFM 5 of engine management system ME2.8 transmitted a signal voltage) to the ME9.7 engine control
unit. The integrated deflection particulate contamination and reduce drift over lifetime.
The air intake temperature sensor is also mounted into the mass air flow sensor
Repair process for hot film air flow sensor (component B2/5) related fault codes:
Repair process for fault codes 1345, 1346, 1347:
The fault codes are stored in case of a problem with the cables or the connectors of the hot film mass air flow sensor (component B2/2) or the hot
film mass air flow sensor itself. Please use the symptom overview for components B2/5 (hot film mass air flow sensor) to locate the problem.
NOTE
Fault code 1347 is stored when the connector (5-pin) of the hot film mass air flow sensor (component B2/5) was unplugged during two key cycles.
To check the signals of component B2/5 (Hot film MAF sensor) on vehicles with ME 9.7 - Motor electronics 9.7 there are two guided test available
in DAS:
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 2
1.) Check signal of component B2/5 (Hot film MAF sensor) via actual value with engine OFF.
2.) check signal of component B2/5 (Hot film MAF sensor) via actual value with engine speed greater then 3500 rpm.
Repair process for fault codes 1349, 1350, 1351, 1352:
These fault codes are stored if the measured air mass is implausible compared to the position of the throttle valve actuator. in this case, please check
component m16/6 (throttle valve actuator) for proper operation.
Repair process for fault codes 1857, 1858:
These fault codes are stored if the ratio of the hot film mass air flow sensor signal to intake manifold pressure is out of range. In this case, please
check component B28 (pressure sensor) for proper operation.
Repair process for fault codes 2181, 2182:
Check for a proper connection of the connector (5-pin) on the hot film mass air flow sensor (component B2/5).
NOTE
Fault code 2182 is stored when the connector (5-pin) of the hot film mass air flow sensor (component B2/5) was unplugged during two key cycles.
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 3
Diagnostic Tree for Hot film air Flow Sensor
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 4
Symptom Overview for Hot Film Mass Air Flow Sensor
Note:
The HFM-SFI signal check of component B2/5 (Hot film mass air flow sensor) via actual value with engine OFF is to be done with ignition ON and
engine OFF. If the engine speed (also shown in the screen of the HFM-SFI signal test) is not 0 rpm, the specified value of the HFM-SFI signal can't
be used for this test.
If the status of the relevant actual value is out of range from the specified value and all test requirements were fulfilled, replace the hot film mass air
flow sensor (component B2/5) and send this part with the required DAS original printouts (see below) to our Quality Evaluation Center.
Note:
Before replacing the hot film air flow sensor, check for sand and dirt particles in the clean side (between air filter and engine) of the air intake system
and clean if necessary. Check complete air intake system with air cleaner and repair as necessary.
Required DAS-printouts for warranty returns:
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 5
^ Printout of all fault codes of the ME 9.7 - Motor electronics 9.7 (Quick test).
^ Freeze frame data of all fault codes stored in the ME 9.7 - Motor electronics 9.7.
^ Printouts (Figure 14, 15) of the HFM-SFI signal of component B2/5 (Hot film mass air flow sensor).
Returned hot film mass air flow sensors (component B2/5) without the required information will be debited back to the dealer as of repair date
February 20, 2006.
Note:
Only original, readable printouts with the VIN number (DAS-readout) of the vehicle are accepted. The required printouts can be made only with
DAS-Version starting 11/2005.
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 1
Vehicle: All Technical Service Bulletins
Hot Film Air Flow Sensor Related Fault Codes
Functional description of the hot film air flow sensor (component B2/5):
Upon engine start, a current is passed through the hot film air flow sensor, heating the sensor element (Figure 12) to a certain constant temperature.
As air passes through the sensor, this film is cooled and the sensor determines how much electricity is required to keep the film up to temperature.
This enables the sensor to determine how much air (in weight) is passing through the sensor at any given moment. It also recognizes the direction in
which the air is flowing it is able to take pulsation and backflows into account. This means that the hot film air flow sensor is able to measure the
actual air mass independent of pulsation and backflows. This signal is then sent to the ME9.7 engine control unit which it compares to a
preprogrammed map to deliver fuel and ignition spark, taking into account other engine inputs such as engine rpm and temperature. The hot film air
flow sensor HFM 6 transmits a frequency (HFM 5 of engine management system ME2.8 transmitted a signal voltage) to the ME9.7 engine control
unit. The integrated deflection particulate contamination and reduce drift over lifetime.
The air intake temperature sensor is also mounted into the mass air flow sensor
Repair process for hot film air flow sensor (component B2/5) related fault codes:
Repair process for fault codes 1345, 1346, 1347:
The fault codes are stored in case of a problem with the cables or the connectors of the hot film mass air flow sensor (component B2/2) or the hot
film mass air flow sensor itself. Please use the symptom overview for components B2/5 (hot film mass air flow sensor) to locate the problem.
NOTE
Fault code 1347 is stored when the connector (5-pin) of the hot film mass air flow sensor (component B2/5) was unplugged during two key cycles.
To check the signals of component B2/5 (Hot film MAF sensor) on vehicles with ME 9.7 - Motor electronics 9.7 there are two guided test available
in DAS:
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 2
1.) Check signal of component B2/5 (Hot film MAF sensor) via actual value with engine OFF.
2.) check signal of component B2/5 (Hot film MAF sensor) via actual value with engine speed greater then 3500 rpm.
Repair process for fault codes 1349, 1350, 1351, 1352:
These fault codes are stored if the measured air mass is implausible compared to the position of the throttle valve actuator. in this case, please check
component m16/6 (throttle valve actuator) for proper operation.
Repair process for fault codes 1857, 1858:
These fault codes are stored if the ratio of the hot film mass air flow sensor signal to intake manifold pressure is out of range. In this case, please
check component B28 (pressure sensor) for proper operation.
Repair process for fault codes 2181, 2182:
Check for a proper connection of the connector (5-pin) on the hot film mass air flow sensor (component B2/5).
NOTE
Fault code 2182 is stored when the connector (5-pin) of the hot film mass air flow sensor (component B2/5) was unplugged during two key cycles.
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 3
Diagnostic Tree for Hot film air Flow Sensor
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 4
Symptom Overview for Hot Film Mass Air Flow Sensor
Note:
The HFM-SFI signal check of component B2/5 (Hot film mass air flow sensor) via actual value with engine OFF is to be done with ignition ON and
engine OFF. If the engine speed (also shown in the screen of the HFM-SFI signal test) is not 0 rpm, the specified value of the HFM-SFI signal can't
be used for this test.
If the status of the relevant actual value is out of range from the specified value and all test requirements were fulfilled, replace the hot film mass air
flow sensor (component B2/5) and send this part with the required DAS original printouts (see below) to our Quality Evaluation Center.
Note:
Before replacing the hot film air flow sensor, check for sand and dirt particles in the clean side (between air filter and engine) of the air intake system
and clean if necessary. Check complete air intake system with air cleaner and repair as necessary.
Required DAS-printouts for warranty returns:
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 5
^ Printout of all fault codes of the ME 9.7 - Motor electronics 9.7 (Quick test).
^ Freeze frame data of all fault codes stored in the ME 9.7 - Motor electronics 9.7.
^ Printouts (Figure 14, 15) of the HFM-SFI signal of component B2/5 (Hot film mass air flow sensor).
Returned hot film mass air flow sensors (component B2/5) without the required information will be debited back to the dealer as of repair date
February 20, 2006.
Note:
Only original, readable printouts with the VIN number (DAS-readout) of the vehicle are accepted. The required printouts can be made only with
DAS-Version starting 11/2005.
