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Lambdas sensor catalogue 2009-2010 GB
GB D
λ
2009–2010
– The World’s largest
manufacturer of Lambda Sensors
Information
Zirconia Lambda Probe
Hexagonal metal body
regulating probe
Heater terminal (white cable)
Heater
diagnostic probe
Sensor earth (grey cable)
Protective tube
left side mounted
right side mounted
manual transmission
Seal
Zircon element
Sensor signal (black cable)
Sealing ring
automatic transmission
Ceramic bracket
Bosch-injection
for gas-powered car
right-hand drive
Titania Lambda Probe
left-hand drive
Protective tube
Substrate
without catalyst
Ceramic bracket
Signal cable
check OE part no.
two sensors fitted
Outer metal body
Sealing ring
Glass seal
Seal
Titania element
Hexagonal metal body
Following car manufactures fitted NTK Lambda sensors as Original Equipment:
Aston Martin · Audi · BMW · Citroen · Daewoo · Daihatsu · Chrysler · Fiat · Ford
General Motors · Honda · Hyundai · Isuzu · Jaguar · Kia · Lancia · Mazda · Mitsubishi
Nissan · Opel · Peugeot · Renault · Rover · Seat · Skoda · Subaru · Suzuki · Toyota · Volvo · VW
Contents
Technical information
Fiat . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Ford . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Gm-Vaz . . . . . . . . . . . . . . . . . . . . . . . 46
Honda . . . . . . . . . . . . . . . . . . . . . . . . . 46
Hyundai . . . . . . . . . . . . . . . . . . . . . . . 49
Innocenti . . . . . . . . . . . . . . . . . . . . . . 51
Jaguar . . . . . . . . . . . . . . . . . . . . . . . . . 51
Jeep . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Kia . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Lada (Avtovaz) . . . . . . . . . . . . . . . . . . 53
Lamborghini . . . . . . . . . . . . . . . . . . . . 54
Lancia . . . . . . . . . . . . . . . . . . . . . . . . . 55
Land Rover . . . . . . . . . . . . . . . . . . . . . 58
Lexus . . . . . . . . . . . . . . . . . . . . . . . . . 58
Mazda . . . . . . . . . . . . . . . . . . . . . . . . 59
Mercedes Benz . . . . . . . . . . . . . . . . . 60
MG . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Mini . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Mitsubishi . . . . . . . . . . . . . . . . . . . . . 71
Nissan . . . . . . . . . . . . . . . . . . . . . . . . . 72
Opel . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Peugeot . . . . . . . . . . . . . . . . . . . . . . . 83
Pontiac . . . . . . . . . . . . . . . . . . . . . . . . 93
Renault . . . . . . . . . . . . . . . . . . . . . . . . 93
Rover . . . . . . . . . . . . . . . . . . . . . . . . . 103
Saab . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Seat . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Skoda . . . . . . . . . . . . . . . . . . . . . . . . . 111
Smart . . . . . . . . . . . . . . . . . . . . . . . . . 113
SsangYong . . . . . . . . . . . . . . . . . . . . . 114
Steyr-Daimler-Puch . . . . . . . . . . . . . 115
Subaru . . . . . . . . . . . . . . . . . . . . . . . . 115
Suzuki . . . . . . . . . . . . . . . . . . . . . . . . . 116
Toyota . . . . . . . . . . . . . . . . . . . . . . . . . 116
TVR . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Volvo . . . . . . . . . . . . . . . . . . . . . . . . . . 118
VW . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Zastava . . . . . . . . . . . . . . . . . . . . . . . . 133
Why are Lambda Sensors fitted? . . . . II
How does the Lambda Sensor
work? . . . . . . . . . . . . . . . . . . . . . . . . . . II
How to test Lambda Sensors . . . . . . . III
Visual Inspection . . . . . . . . . . . . . . . . . IV
Why choose
NTK Lambda Sensors? . . . . . . . . . . . . . IV
Sensor applications (Passenger car)
Alfa Romeo . . . . . . . . . . . . . . . . . . . . 1
Aston Martin . . . . . . . . . . . . . . . . . . . 5
Audi . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Autobianchi . . . . . . . . . . . . . . . . . . . . 11
BMW . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chevrolet . . . . . . . . . . . . . . . . . . . . . . 19
Chrysler . . . . . . . . . . . . . . . . . . . . . . . 20
Citroen . . . . . . . . . . . . . . . . . . . . . . . . 22
Dacia . . . . . . . . . . . . . . . . . . . . . . . . . 30
Daewoo . . . . . . . . . . . . . . . . . . . . . . . 31
Daihatsu . . . . . . . . . . . . . . . . . . . . . . . 31
Daimler . . . . . . . . . . . . . . . . . . . . . . . . 32
Dodge . . . . . . . . . . . . . . . . . . . . . . . . . 32
Ferrari . . . . . . . . . . . . . . . . . . . . . . . . . 33
Sensor applications (Motorcycle)
. . 134
Technical information
Buyers Guide . . . . . . . . . . . . . . . . . . . 140
Cross Reference Guide . . . . . . . . . . . 146
NTK
kW . . . . . . . . . . . . . . . . . . . . . 223
Handling/Installation Instructions . . 223
Whilst every care is taken in compiling these
recommendations they do not form part of any
contract and as such we do not accept any
responsibility in respect of any claim whatsoever
and howsoever caused arising from the
publication of this catalogue.
©
NGK 2009
I
NTK . . . . . . . . . . . . . . . . . . . . 175
Sensor Information . . . . . . . . . . . . . 176
Connectors . . . . . . . . . . . . . . . . . . . . . 183
PS
→
↔
Why are Lambda sensors fitted?
Everyone agrees that the amount of
pollution produced by motor vehicles
should be reduced. In order to encourage
this governments have progressively
introduced tougher and tougher exhaust
gas emission legislation.
The most popular method used by
vehicle manufacturers to reduce vehicle
emissions is the three-way catalyst. This
device converts the main pollutants in
the exhaust gas to less harmful gases.
However the three-way catalyst only
works efficiently if the air-fuel ratio can
be kept within very tight limits. This is
where the lambda sensor comes in.
The lambda sensor is typically situated
in the exhaust pipe just before the
three-way catalyst. The central element
of the lambda sensor is exposed to the
exhaust gas.
The lambda sensor continuously detects
the composition of the exhaust gas. As
the output from the sensor changes the
ECU instructs the fuel mixing system to
alter the mixture strength (see diagram I).
This is known as closed-loop control and
ensures that the mixture strength is
always correct and ensures optimum
catalyst efficiently. At the same time
driving performance is assured.
Diagram I
Engine manage-
ment system
Lambda sensor
Fuel
Air
Fuel induction
system
Engine
3-way
catalytic
converter
Exhaust gas
How does the Lambda sensor work?
There are two types of lambda sensors.
They use different ceramic elements to
detect the composition of the exhaust
gas.
Zirconia Sensors:
The outside of the
Zirconia element is in contact with the
exhaust gas; the inside is in contact
with the air. Both sides of the element
are coated with a thin platinum layer.
Oxygen ions are able to pass through
the element and deposit a charge on
the platinum layer. These platinum
layers are the electrodes that carry the
sensors' signal from the sensor
element to the sensors' lead wire
(see diagram II).
The Zirconia element conducts oxygen
ions above a temperature of about
300°C. Because of the special properties
of the Zirconia element a voltage is
generated if the oxygen concentration
on the two sides of the element are
different. A low voltage is produced if
the air-fuel mixture is too lean and a
high voltage is produced if it is too rich.
There is a large change in voltage
around = 14.7:1 AFR (see diagram III).
Diagram III
Converstion rate
of catalytic converter
Sensor
voltage
100
HC
Diagram II
Exhaust gas
50
1,0
NOx
Air
CO
Sensor element
V
0,2
0
λ
0.9
rich
1.0
stoichiometric
1.1
lean
II
Protective tube
Substrate
) 1.0
and is why the sensors are referred to
as Lambda sensors. The ECU uses the
voltage produced by the Lambda sensor
to instruct the fuel mixing system to
strengthen or weaken the mixture.
Since the sensor only produces a
voltage when the element is above
approx. 300°C, it takes the exhaust gas
a little while to heat the element up to
this temperature after the engine has
been switched on. In order to reduce
the time it takes for the sensor to start
working most sensors today are fitted
with an internal ceramic heater. These
sensors have 3 or 4 lead wires. NTK's
ceramic heaters utilise our long
experience in thick film multi-layer
technology, ensuring top performance
and reliability.
Ceramic bracket
Signal wire
Outer metal body
Glass seal
Seal
Sealing ring
Hexagonal metal body
Titania element
Titania Sensors
: The Titania element in
these sensors does not produce a
voltage like the Zirconia element does.
Instead the electrical resistance of the
Titania element changes according to
the concentration of oxygen in the
exhaust gas. There is a big change in
the resistance of the element at
Lambda 1.0. Therefore when a voltage
is applied to the element the output
voltage changes depending on the
oxygen concentration in the exhaust
gas. This signal from the sensor is used
by the ECU for closed loop control. As
Titania sensors do not need air on one
side of the element they can be made
smaller and are completely submergible.
The sensor element, its platinum
electrodes and heater element are all
mounted on a ceramic substrate using
NTK's thick film multi-layer technology.
Titania and Zirconia sensor are not
interchangeable due to the difference
in size and the different control
strategies that are used to interpret
the sensor signal.
How to test Lamnda sensors
Failed or worn-out Lambda sensors
cause problems such as poor fuel eco-
nomy, failed emission test, failure of the
catalytic converter and poor driveability.
Before you can test the operation of
the Lambda sensor you will need an
oscilloscope. You should first check that
the basic engine setup is to the manu-
facturers' specification. Then thoroughly
warm up the engine-remember the
Lambda sensor will only function once
it is up to temperature.
Using the appropriate connecting devi-
ce, connect the sensor output to your
oscilloscope-do not disconnect the sen-
sor from the ECU. Run the engine at
approx. 2,000 r.p.m.
A properly functioning Lambda sensor
will show a rapidly fluctuating output
signal between approximately 0.2 and
0.8 volt. The time taken to change from
0.2 volt to 0.8 volt (lean to rich respon-
se time) should be about 300 milli-
seconds. The rich to lean response time
should be similar.
If the sensor output is constant or the
response time is too slow the sensor
should be changed.
It is a good idea to check Lambda sen-
sor function at every tune-up and befo-
re submitting cars for emission tests.
A slow sensor will effect fuel economy.
A new sensor will soon pay for itself by
cutting fuel bills.
III
This AFR is known as Lambda (
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