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A
B
C
D
E
F
F
H
I
L
I
H
M
N
O
P
Q
R
122
A
D
C
B
E
G
35.3 E
XPANSION CHAMBER AND LAMBDA SENSOR
D
:
ISASSEMBLY
·
Remove silencers as described in section L, subsec-
tion 2;
·
remove the left side body panel, as described in sec-
tion E, subsection 3;
·
disconnect Lambda sensor "A" connector and release
the wiring;
·
loosen the two ties "B" on exhaust pipes;
·
loosen the 2 nuts "G" between U-bolt "H" and frame
and remove the two screws "I" and washers.
·
to remove the expansion chamber "C" with Lambda
sensor "D", pull it downwards.
Take special care not to damage sensor wiring.
·
Loosen Lambda sensor "D" and separate it from ex-
pansion chamber "E".
R
:
EASSEMBLY
Perform the disassembly procedure in reverse order.
Note
To check Lambda probe correct operation,
check the CO rate.
35.4 C
HECKING
TION
CO%
CHECK
I
·
Connect the AXONE2000 tester as described in sub-
section 33 (C
C
TING PROCEDURE WITH
socket and the CO tester to the two special "E" sock-
ets on the exhaust manifolds "F"
·
The CO% test must be carried out with the engine at
idling speed - 1100 ± 50 RPM, value that could be
always read on the engineering parameters display
under "rpm" - at least 2 minutes after engine ignition
(due to the automatic enrichment) and with an en-
gine oil temperature of 70°÷80°, indicated by the en-
gine oil sensor. This can be viewed on the engineer-
ing parameters display under "engine temperature".
•
Check that a CO% value ranging between 0,7 and
1,2. is detected for both cylinders.
An unbalance of ±0,2% between the two cylinders is
acceptable.
·
If the CO% is outside the specified limits, change the
Lambda sensor.
V11 S
R
C
OSSO
L
AMBDA SENSOR CORRECT OPERA
,
,
ARBURATION
CONTROL
ADJUSTMENT AND SET
AXONE 2000) the diagnosis
M
2003 - L
M
M
2003
PORT
Y
E
ANS
Y
- C
S
- B
ORSA
AFE
PORT
ALLABIO VARIANTS
-
-
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