gf0761p2004v

Diagnosis fault memory, ME-SFI function

Type gf · topic 07.61 · version 0112 · 2008-04-04

Applies to: ENGINE 272.920 in MODEL 203 up to Model Year 8 ENGINE 272.922 in MODEL 211 ENGINE 272.940 in MODEL 203 up to Model Year 8 ENGINE 272.941 in MODEL 203 up to Model Year 8 ENGINE 272.942 in MODEL 171 up to Model Year 8 ENGINE 272.943 in MODEL 211, 219 ENGINE 272.944 in MODEL 211 ENGINE 272.945 in MODEL 251 up to Model Year 8 ENGINE 272.946 in MODEL 221 up to Model Year 8 ENGINE 272.960 in MODEL 203 up to Model Year 8 ENGINE 272.963 in MODEL 171 up to Model Year 8 ENGINE 272.964 i

Where it sits

Function group 1 Engine › 07 Mixture formation › 07.61 ME fuel injection/ ignition system — Series 164 · Series 171 · Series 203 · Series 209 · Series 211 · Series 216 · Series 219 · Series 221 · Series 230 · Series 251

Also applies to engines/gearboxes: 272 920, 272 922, 272 940, 272 941, 272 942, 272 943, 272 944, 272 945, 272 946, 272 960, 272 963, 272 964, 272 965, 272 966, 272 967, 272 970, 272 972, 272 975, 273 922, 273 923, 273 924, 273 960, 273 961, 273 962, 273 963, 273 965, 273 967, 273 968

GF07.61-P-2004V

Diagnosis fault memory, ME-SFI function

29.11.07

ENGINE 272.920 in MODEL 203 up to Model Year 8

ENGINE 272.922 in MODEL 211

ENGINE 272.940 in MODEL 203 up to Model Year 8

ENGINE 272.941 in MODEL 203 up to Model Year 8

ENGINE 272.942 in MODEL 171 up to Model Year 8

ENGINE 272.943 in MODEL 211, 219

ENGINE 272.944 in MODEL 211

ENGINE 272.945 in MODEL 251 up to Model Year 8

ENGINE 272.946 in MODEL 221 up to Model Year 8

ENGINE 272.960 in MODEL 203 up to Model Year 8

ENGINE 272.963 in MODEL 171 up to Model Year 8

ENGINE 272.964 in MODEL 211, 219

ENGINE 272.965 in MODEL 221 up to Model Year 8

ENGINE 272.966 in MODEL 230 up to Model Year 8

ENGINE 272.967 in MODEL 164, 251 up to Model Year 8

ENGINE 272.970 in MODEL 203 up to Model Year 8

ENGINE 272.972 in MODEL 211

ENGINE 272.975 in MODEL 221 up to Model Year 8

ENGINE 273.922 in MODEL 221 up to Model Year 8

ENGINE 273.923 in MODEL 164 up to Model Year 8

ENGINE 273.924 in MODEL 221 up to Model Year 8

ENGINE 273.960 in MODEL 211, 219

ENGINE 273.961 in MODEL 216, 221 up to Model Year 8

ENGINE 273.962 in MODEL 211

ENGINE 273.963 in MODEL 164, 251 up to Model Year 8

ENGINE 273.965 in MODEL 230 up to Model Year 8

ENGINE 273.967 in MODEL 209

ENGINE 273.968 in MODEL 221 up to Model Year 8

ENGINE 272.940 in MODEL 209

ENGINE 272.960 in MODEL 209

Diagnosis fault memory, ME-SFI function

P07.61-3064-05

Illustrated on model 171

0100 STAR DIAGNOSIS

A1 Instrument cluster

A1e26 "CHECK ENGINE" indicator lamp (for )

A1e58 Engine diagnosis indicator lamp (except )

N3/10 ME-SFI [ME] control unit

N10/1 Driver-side SAM control unit with fuse and relay module

X11/4 Data link connector

CAN Data bus

The ME-SFI [ME] control unit checks its input and output signals for plausibility and recognizes possible faults. The detection of faults and their storage is differentiated in:


Faults constantly present

Loose contact fault (only on coolant temperature sensor (B11/4) and accelerator pedal sensor (B37))

The following components and systems are monitored:

Oxygen sensors

Catalytic converters

CAT heater

Secondary air injection

Smooth running control (combustion misfire)

Fuel system

Control units which are linked via the data bus

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Fault recognition

The following faults and error states are detected:

Signals above or below the limit value
(open circuits, short circuits, faulty sensor)

Frequency of fault

Illogical combination of signals

Function chains with faults

Fault messages of all systems transmitted via CAN data bus (control units)

Fault states from the alternator (G2) with interface controller

Fault display via engine diagnosis indicator lamp or
CHECK ENGINE

If an exhaust gas relevant error occurs or if it was already stored in the last driving cycle, the indicator lamp lights up in the instrument cluster.

In the event of a fault which could damage the catalytic converter, the engine diagnosis indicator lamp flashes.

The indicator lamp goes out after 3 correct, successive driving cycles.

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Fault storage

Recognized faults are stored when they arise for the first time with their environmental data in the fault memory. If the fault is not confirmed during the following driving cycle, it is deleted. Emission-relevant faults are always entered, they have a high priority.

After 40 correct driving cycles an exhaust gas relevant fault and after 80 correct driving cycles a CAT damaging fault is erased from the fault memory.

Read out the fault memory

The ME-SFI [ME] control unit is connected via a serial interface (K-line) to the data link connector. The stored faults can be read out and deleted with STAR DIAGNOSIS or with a standard output device (generic scan tool) with "Ignition ON" or with the engine running via the data link connector (SAE standard ISO 9141-2).

The fault memory is not erased if the vehicle battery is disconnected.

Emergency running

If a fault is detected, substitute values are formed for the emergency running and the engine diagnosis/CHECK ENGINE indicator lamp lights up.

ME-SFI [ME] control unit run-on

After faults are erased it is necessary to wait until the processor has completed its power-down sequence after the ignition is switched off.

The duration is dependent on the coolant temperature and is between 5 and 150 seconds.

ME-SFI [ME] control unit, component description

GF07.61-P-6000V

Component description for the "CHECK ENGINE" indicator lamp

For

GF54.30-P-5011V

Component description for the engine diagnosis indicator lamp

except

GF54.30-P-5010V

Referenced documents