Technical data
COMPLETE CAR
Check of ,e#hahst emissions
The Nprocedure is
valid
for 1.7
elec-
,tronic injeckion engines with catalytic
convertor.
”
1.
Disconnect the’ wiring ,of the
Lambda sensor.
2. Using the spanner A-5.021 2,
un-
screw the plug!
0
located at the inlet
of the catalytic silencer box
@
4 Start
the
engine and check that
with the engine running on idle
the
CO% and the quantity of unburned
hydrocarbons are less than the
speci-
fied values.
After adjustment of the idle r.p.m.
following the’ above described
pro-
cedure,
pr@ed
to the check and
adjustmentI
(if necessary) of the ex-
haust emi.ssions by operating as
fol-
lows.
This sempl~ified
procedure
is for use
”
with
engines
equipped with FIAT
TESTER
typle
wiring.
‘Use wiring~
ir&rument
No. C. 90034
illustrated ih thecircuitdiagram below:
3 WAY
CONN,ECi’OR
FOR
470
OHVS
112
W
MIN AND MAX
{WITCH
3 WAY CONNECTOR FIAT TESTER
PIN C
1, Warm
~up
engine
2. Rem’otie
min.,,and
max switches
wiring
side,connectorandthe
3 way
connecter
Of the instrument.
4.
Insert
~ the cormector of the in-
strument
it$
the 3
tiaytroublediagnosis
connecter.’
‘I
,.
5. Check the state of the
LED’diode
and proceed to adjust the screw
of
the
potentiometer located in the plugged
seating.
?he
correct setting is obtained
when
the
~“ON” time of the flashing
LED is
eqtial
to the “OFF’ time. When
this setting h’as be&n obtained replug
the seating
of,the
“CO” screw.
As an alternative to the above
pro-
cedure,
orjerate
as
fol’lows.
A-5.02127
/
1,
Plug for sampling
exhatist
gas
2.
Catalytic
silencer box
3. Fit
th’e
tool
C.2.0051
on thefitting
for sampling exhaust gases and
con-
nect
it with tube
@
to the exhaust
gas tester
When the engine is in its normal runn-
ing state a?d the lambda probe is
disconnecte~d,
the value correspond-
ing
to the total
emiskons
before the
cata-
lytic exhaust head shall be included
in the range’mentioned below.
volume % CO: 0.8 (min) to 1.5 (max)
5. Should
lthe
CO% not
fall
within
the
specified
values, it Will be necess-
ary to act on the adjusment screw
located
iin
the debimeter in the plugged
seating.‘,lt
,will
then be necessary
to check
that
the idle r.p.m.
falls
within
the specified
valupsof
900-1050
r1p.m.
and if it
does
ndt to follow the
pro-
cedure
described
at
the previous step.
Once the
setting
has been effected,
re-plugg
the’seating
with the
apropria-
te seal and reconnect the lambda
sensor.
2
Catalytic
silencer box
2 Tube
connected
to
exhaust
gas
tester
May
1;988
00-16
PA333500883300