gf0761p3025f

O2 sensor heater, function

Type gf · emne 07.61 · version 0120 · 2008-04-04

Gælder for: ENGINES 104 (except 104.98) ENGINES 111 (except 111.951 /955) ENGINES 111.951 /955 up to Model Year 08 /Modification Year 07 ENGINES 112 (except 112.96 /946) ENGINES 112.946 up to Model Year 08 /Modification Year 07 ENGINES 113 (except 113.963 /964 /971 /989 /99) ENGINES 113.963 /964 /971 /989 up to Model Year 08 /modification year 07 ENGINES 119, 120, 137, 166

Ikke tilgængelig på “da”; vises på Engelsk.

Placering

Funktionsgruppe 1 Motor › 07 Blandingstilberedning › 07.61 Benzinindsprøjtnings- og tændingssystem ME — Serie 166

Gælder også for motorer/gearkasser: 104 90*, 104 94*, 104 99*, 111 400, 111 920, 111 921, 111 940, 111 941, 111 942, 111 943, 111 944, 111 945, 111 946, 111 947, 111 948, 111 950, 111 951, 111 952, 111 955, 111 956, 111 957, 111 958, 111 960, 111 961, 111 970, 111 973, 111 974, 111 975, 111 977, 111 978, 111 979, 111 980, 111 981, 111 982, 111 983, 111 984, 112 910, 112 911, 112 912, 112 913, 112 914, 112 915, 112 916, 112 917, 112 920, 112 921, 112 922, 112 923, 112 925, 112 940, 112 941, 112 942, 112 943, 112 944, 112 945, 112 946, 112 947, 112 949, 112 951, 112 953, 112 954, 112 955, 112 970, 112 972, 112 973, 112 975, 112 976, 113 940, 113 941, 113 942, 113 943, 113 944, 113 948, 113 960, 113 961, 113 962, 113 963, 113 964, 113 965, 113 966, 113 967, 113 968, 113 969, 113 971, 113 980, 113 981, 113 982, 113 984, 113 985, 113 986, 113 987, 113 988, 113 989, 119 ***, 120 ***, 137 ***

GF07.61-P-3025F

O2 sensor heater, function

20.3.08

ENGINES 104 (except 104.98)

ENGINES 111 (except 111.951 /955)

ENGINES 111.951 /955 up to Model Year 08 /Modification Year 07

ENGINES 112 (except 112.96 /946)

ENGINES 112.946 up to Model Year 08 /Modification Year 07

ENGINES 113 (except 113.963 /964 /971 /989 /99)

ENGINES 113.963 /964 /971 /989 up to Model Year 08 /modification year 07

ENGINES 119, 120, 137, 166

O2 sensor heater, function

P07.61-2442-06

Shown on engine 119

B11/4 Coolant temperature sensor

F1 Fuse and relay module
Model 163

G3/1 O2 sensor downstream of TWC
Engine 111, 104 and EURO3/4

G3/2 O2 sensor upstream of TWC
Engine 111, 104

G3/3 Left O2 sensor upstream of TWC
Engine 112, 113, 119, 120

G3/4 Right O2 sensor upstream of TWC
Engine 112, 113, 119, 120

G3/5 Left O2 sensor downstream of TWC
Engine 112, 113, 119, 120 and EURO3/4

G3/6 Right O2 sensor downstream of TWC
Engine 112, 113, 119, 120 and EURO3/4

K1/2 Overvoltage protection relay
Model 124, 202 up to 7/96

K40 Relay module model 170, 210 up to 2/97

K40/4 Fuse and relay module

Model 202 as of 8/96, 210 as of 3/97

K40/7 Right fuse and relay module
model 215, 220 (K40/4 in model 230)

L5 Crankshaft position sensor

N3/4 HFM-SFI [HFM] control unit

N3/10 ME-SFI [ME] control unit

N10/1 Front SAM control unit with fuse and relay module model 203

N16/1 Base module, Model 129, 140

O2 sensor heater, function

P07.51-0567-05

Shown on ENGINE 166

B11/4 Coolant temperature sensor

G3/1 O2 sensor downstream of TWC (low emission EURO3/D4)

G3/2 O2 sensor downstream of TWC

K1/6 Electronics relay

L5 Crankshaft position sensor

N3/5 ECM control unit (up to 08/01)

N3/18 ECM control unit with throttle valve actuator (as of 09/01)

The purpose of the O2 sensor heater is to rapidly heat up the O2 sensors to their operating temperature while preventing damage to the ceramic material as a result of controlled heating power.

The sensor heater is actuated by the engine control unit through ground. The performance of the sensor heater at operating temperature amounts to:

18 w on Engine 104, 111, 119, 120 and 112, 113 with ME2.0

12 w on Engine 166 .

7 W on engine 137, 111EVO and 112, 113 with ME 2.8 as of 6/00.

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The voltage for the sensor heater is supplied by the:

Overvoltage protection relay model 124, 202 up to 7/96

Relay module, model 170, model 210 up to 2/97

Base module, model 129, 140

Fuse and relay module, model 202 as of 8/96, model 210 as of
3/97, model 163 designation F1

Electronics relay, model 166

Right fuse and relay module (K40/7), model 215, 220

Right fuse and relay module (K40/4), model 230

Front SAM control unit with fuse and relay module

Model 203, 209, 211

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In the cold state, the current is increased approximately by a factor of 4. At coolant temperatures below approx. 20 °C and at high engine speeds the sensor heater is switched off.

Engine 112, 113

The sensor heaters for the left and right O2 sensors are connected in parallel in the ME-SFI control unit.

Engine 119

The sensor heaters for the left and right O2 sensors are connected in parallel.

Engine 120

The sensor heaters for the left and right O2 sensors are assigned to the respective engine control unit.

Engine 137

Each sensor heater has its own, short-circuit proof output stage in the engine control unit with diagnosis. As a protection for the ceramic, the sensor temperature upstream of TWC is limited to approx. 350 °C in the condensation phase after cold start. After this, the temperature is controlled to approx. 700 °C. The exhaust temperature is determined from various engine operating data for this purpose and the sensor heated accordingly.

Different values apply to the O2 sensor heaters downstream of TWC.

HFM-SFI control unit, location/task/design/function

Engine 104 HFM, 111 HFM

GF07.51-P-4103D

ME-SFI control unit, location/task/design/function

Other than engine 111 EVO

GF07.61-P-5000F

Engine 111 EVO

GF07.61-P-5000GS

ECM control unit, location/task/design/function

M166 to 08/01

(hot film mass air flow sensor and intake air temperature sensor integrated)

GF07.53-P-4103GC

As of 09/01

(throttle valve actuator integrated)

GF07.53-P-4103GD

O2 sensors, location/task/design/function

GF07.04-P-4103F

Coolant temperature sensor, location/task/design/function

Engine 119, 120

GF07.04-P-5026F

Engines 104, 111

GF07.04-P-5026G

Engine 112, 113, 137

GF07.04-P-5026A

Crankshaft position sensor, location/task/design/function

ME-SFI fuel injection and ignition system (ME)

GF07.04-P-4116F

HFM-SFI fuel injection and ignition system

GF07.04-P-4116G

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