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Maintenance
B
Maintenance
ADJUSTMENT AND CALIBRATION OF THROTTLE
BODY (MY10 -> MY12)
After connecting to the control unit diagnostic software
and before starting the engine, immediately check the
throttle position:
2.3 degrees (min 1.9, max 2.6)
If the position should not enter within the recommended
field, reset with the TPS function, WITHOUT TOUCHING
THE MECHANICAL ADJUSTMENT SCREWS OF THE
THROTTLE.
Select the reset function for the throttle potentiometer
from the TPS dropdown menu by means of the "screw-
driver" icon on the Display/Calibration/Cancel errors
menu.
Before starting the engine, verify the position of the
exhaust valve: from the "Enable/Disable" dropdown
menu, it is possible to select the EXHAUST command to
reset the exhaust valve. After making these adjustments,
remove the ignition key for about 20 seconds to enable
the control unit to store new resets.
Then connect the vacuum gauge and the engine will start
warming up.
You will see that after starting the engine the Lambda
channel (mvolt), which was next to zero, will start to rise.
After starting the Lambda control (Lambda % range),
the Lambda (mvolt) will range between a high of 1000
mvolt and a low of 0 mvolt (minus the diagnostic soft-
ware lag). To see the range more clearly, adjust the two
graphic settings.
The above behaviour means the Lambda probe is in
working order.
Otherwise, if the Lambda (mvolt) shows a fixed value
of about 0 mvolt or 1000 mvolt, after about thirty sec-
onds, with the Lambda % controller fixed at -25% or
+25%, the system will send out a ‘Lambda probe volt-
age’ alarm.
In this case, check the electric connection between the
Lambda probe and the system or replace the Lambda
probe.
Levelling of intake manifold settings
To check this, use a mercury vacuum gauge of the type
shown in the figure.
Then, level the vacuum inside the intake manifolds.
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