Warming-up control function · gf2000p3008d · Mercedes-Benz WIS

GF20.00-P-3008D

Warming-up control function

9.1.09

ENGINE 271.942 in MODEL 203 up to model year 2008 /AEJ 07

ENGINE 271.942 in MODEL 209

P07.70-2013-06

B2/5 Hot film mass air flow sensor

B11/4 Coolant temperature sensor

B17 Intake air temperature sensor

B37 Accelerator pedal sensor

L5 Crankshaft position sensor

M16/6 Throttle valve actuator

N3/10 ME-SFI [ME] control unit

N10/1 Front SAM control unit with fuse and relay module

X11/4 Data link connector

Y76 Fuel injectors

The fuel-air mixture is further enriched via the warm-up control after start and post-start enrichment. The warm-up control compensates for fuel which precipitates on the still cold engine parts.

An additional quantity of fuel is added to the engine by the ME-SFI [ME] control unit in line with the performance map. The injection time is extended accordingly for this purpose.

Warm-up control is dependent on:

 Coolant temperature

 Intake air temperature

 Engine speed

 Engine load

 Correction programming with STAR DIAGNOSIS

P07.61-2691-01

a Start

b Start of cutoff of post-start enrichment

c Start of warm-up enrichment

t Time

t1 Starting mixture enrichment (duration e.g. 2 s)

t2 Post-start enrichment (duration e.g. 15 seconds at coolant temperature of 15°C)

t3 Warm-up enrichment (duration dependent on coolant temperature)

A Enrichment rate

Fuel injectors, location/task/design/function	Y76	GF07.03-P-2103D
Intake air temperature sensor, location/task/design/function	B17	GF07.04-P-2100KE
Crankshaft position sensor, location/task/design/function	L5	GF07.04-P-4116D
Coolant temperature sensor, location/task/design/function	B11/4	GF07.04-P-5026D
Hot film mass air flow sensor, location/task/design/function	B2/5	GF07.07-P-4118KE
ME-SFI [ME] control unit, location/task/design/function	N3/10	GF07.61-P-5000KE
Accelerator pedal sensor, location/task/design/function	B37	GF30.20-P-4010KE
Throttle valve actuator, location/task/design/function	M16/6	GF30.22-P-4101KE

Referenced documents

gf0703p2103d Fuel injectors - location/task/design/function
gf0704p2100ke Intake air temperature sensor - location/task/design/function
gf0704p4116d Crankshaft position sensor - location/task/design/function
gf0704p5026d Coolant temperature sensor - location/task/design/function
gf0707p4118ke Hot film mass air flow sensor, location/task/design/function
gf0761p5000ke ME-SFI control unit, location/task/design/function
gf3020p4010ke Accelerator pedal sensor, location/task/design/function
gf3022p4101ke Throttle valve actuator, location/task/design/function