Exhaust aftertreatment, function · gf1440p0002d · Mercedes-Benz WIS

GF14.40-P-0002D

Exhaust aftertreatment, function

9.1.09

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

ENGINES 271.942 in MODEL 209

P07.70-2030-09

21 Exhaust flap

126 Secondary air injection/ exhaust gas recirculation combination valve

157 Firewall catalytic converter

159 NOX catalytic converter

B11/4 Coolant temperature sensor

B19 CAT temperature sensor

B37 Accelerator pedal sensor

Y76 Fuel injectors

Y93 Exhaust flap switchover valve

CAN CAN data bus
(Controller Area Network)

a Exhaust line for normal mode

b Bypass exhaust line
(for heating/cooling of catalytic converter)

G3/1 O2 sensor after downstream of catalytic converter

G3/2 O2 sensor downstream of catalytic converter

L5 Crankshaft position sensor

M16/1 EGR [ARF] actuator motor

M16/6 Throttle valve actuator

N3/10 ME-SFI [ME] control unit

N37/4 NOX (nitrogen oxides) control unit

N37/4b1 NOX (nitrogen oxides) sensor

Y32 Air pump switchover valve (secondary air injection)

The emission control system is divided into the following subsystems which are controlled and coordinated by the ME-SFI [ME} control unit:

 Secondary air injection

 Exhaust gas recirculation

 Lambda control

 Two-sensor control

 Catalytic converter heating up

 NOX intermediate storage and conversion

The task of the emission control system is to reduce the exhaust emissions:

 Nitrogen oxides (NOX)

 Hydrocarbon (HC)

 Carbon monoxide (CO)

	Lambda control, function		GF07.10-P-1010D
	Two-sensor control function		GF07.04-P-3020D
	Oxygen sensor heater, function		GF07.04-P-3025D
	NOX intermediate storage function		GF07.70-P-3027D
	Catalytic converter heating, function		GF49.10-P-3030D
	Exhaust gas recirculation, function		GF14.20-P-3000DE
	Air injection, function		GF14.30-P-3012DE
	Monitoring catalytic converter efficiency, function		GF49.10-P-3033D