ENGINE   113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969 ENGINE   137.970

		P07.61-0370-05

087 Hand-HeldTester HHT 094 Multiplex cable (can be connected to 16-pin data link connector using adapter) K40 Relay module (model 170, 210 up to 2/97) K40/4 Fuse and relay module (model 202, 210 as of 3/97, model 163 designation F1, model 215, 220 designation K40/7)

N3/10 ME-SFI control unit N16/1 Base module (Model 129, 140, voltage supply of ME control unit) X11/4 Datalink connector X11/22 Diagnostic data link connector II CAN Data bus

0100 STAR DIAGNOSIS K40 Relay module (model 170) K40/4 Fuse and relay module (Model 202, 208, 210) N3/10 ME-SFI control unit N10/1 Front SAM control unit with fuse and relay module (Model 203) N10/1 SAM control unit with a fuse and relay module for the driver (type 211) X11/4 Datalink connector CAN Data bus
		P07.61-2439-05

Shown on model 210 X11/22 Data link connector (further designation X11/4)
		P07.51-0374-01

The ME-SFI control unit checks its inputs and outputs for plausibility and recognizes possible faults. The identification of faults and their storing is differentiated as follows: Faults permanently existing Loose contact faults. The diagnostic trouble code memory is erased when the vehicle battery is disconnected. Reading out fault memory The stored faults can only be read out and erased with the HHT or the STAR DIAGNOSIS when ignition is "ON" or when "engine running" at the diagnostic data link connector In line with legal requirements, faults can also be read at the data link connector conforming to SAE standard, ISO 9141-2, with a generic scan tool.

Engine 120 The ME-SFI control units on the left (N3/11) and right (N3/12) feature a fault memory. All the faults together can be read out only from the right ME-SFI control unit (N3/12). Fault recognition Signals above or below limit value (open circuit in wiring, short circuit, sensors faulty) Frequency and duration of fault Illogical combination of signals Closed loop (e.g. lambda control) at upper or lower control stop Function chains with fault Error messages via extremely fast data bus called CAN from control unit AT, ESP or IFRCL (Engine 120: Left ME control unit)

Fault storage Faults detected for the first time are written to the fault memory first of all as "suspected fault" together with the fault freeze frame data. If the fault is not confirmed in the subsequent driving cycle, it is erased. If the fault is confirmed, it is stored together with its fault freeze frame data. Faults which no longer occur are erased automatically from the fault memory after max. 40 warming-up phases. Actuation of the CHECK ENGINE malfunction indicator lamp Actuation of the engine diagnosis malfunction indicator lamp with low-emission EURO3/4 The indictor lamp in the instrument cluster comes on if the fault was already stored in the last driving cycle ( model year 1996: during the last trip). The "CHECK ENGINE" MIL or engine diagnosis at low emission EURO3/4 is quenching, if in the 3 driving cycles no fault is detected ( model year 1996: during the last 3 trips).

A warming-up phase is completed: coolant temperature at start < 35 °C Coolant has heated up to > 70 °C A driving cycle (driving-cycle) is always based on an individual test and consists of engine start Individual test performed engine turned off. A trip ( model year 1996) is completed if all tests and function chains of exhaust-relevant faults are performed at least once since engine start Time after start > 20 minutes Engine temperature greater than -7 °C Engine speed > 500 rpm Since the criterion of trip (model year 1996) has been replaced by the driving cycle (driving-cycle), faults are stored and the CHECK ENGINE indicator lamp (MIL) is actuated more rapidly.

Fault freeze frame data/operating conditions The following data are stored if a fault is recognized: Fault code Vehicle speed Engine speed Coolant temperature Intake air temperature Intake manifold pressure Engine load state Ignition angle Adaptation value of mixture formation Status of lambda control - Lambda control not enabled - Lambda control enabled - Lambda control inhibited (e.g. if fuel shut off) - Lambda control inhibited (e.g. if fault detected) - Lambda control without correction of O2 sensor downstream of TWC Further environmental conditions (e.g. fuel tank level, time after end of engine start, erase distance since last fault, erase counter readings for faults or fault frequency)

Function chains are test sequences activated by the ME-SFI control unit, e.g. for secondary air injection, exhaust gas recirculation, camshaft timing, purge system and leaktightness of evaporative emission control system. Consequential faults If a faulty signal is recognized and the corresponding fault code is stored, all the tests which require this signal as a comparative parameter, are ended. This ensures that no consequential faults are stored. Emergency running If a fault is detected, substitute values are formed. The indicator lamp in the instrument cluster only lights up, if the fault was already stored.

Readiness/function code This code makes it possible to recognize that tests relating to fault recognition are in progress and the system is thus active. The code is set if the following tests are completed (result of test of no significance): Catalytic converter efficiency Regeneration Secondary air injection Exhaust gas recirculation O2 sensor upstream of TWC, signal O2 sensor upstream of TWC, sensor heater.

ME-SFI control unit afterrunning After faults are erased, it is then necessary to wait until the processor has completed its afterrunning after the ignition is switched off. The time is dependent on the coolant temperature: at 80 °C approx. 4 seconds, at 20° C approx. 60 s and at -30° C approx. 150 s.

	Motor electronics control unit, location/task/design/function		GF07.61-P-5000F
	Pressure sensor location/design/task/function	with air injection Engine 113 with CODE 479 (cylinder shutoff)	GF07.04-P-5014F
	CHECK ENGINE malfunction indicator lamp, location/task/function		GF07.13-P-3144F
	Engine diagnosis malfunction indicator lamp, location/task/function	EURO3/4 (Code 925/926 or standard)	GF54.30-P-4102A
	ME-SFI fuel injection and ignition system diagnosis fault memory	List of all P-codes with possible causes of fault and references to remedy, Fault code descriptions with driving instructions
		Engine 113 withME2.0 up to 31.5.00 Fault codes from P0000 to P0304	AD07.61-P-4000B
		Engine 113 withME2.0 up to 31.5.00 Fault codes from P0305 to P0743	AD07.61-P-4000BA
		Engine 113 withME2.0 up to 31.5.00 Fault codes from P0748 to P1747	AD07.61-P-4000BB
		Engine 113 with ME2.8 as of 1.6.00	AD07.61-P-4000BC
		Engine 137	AD07.61-P-4000L