Fiat 1998 Marea Weekend, Service Manual

Page: 268 / 846

Engine
Fuel system
lev
Marea- Marea Weekend 0
99 range
ENGINE CONTROL UNIT
Removing - refitting
Proceed with the removal of the control unit as
follows:
- disconnect both connectors, working in two
stages:
A) turn the metal hook upwards to release
the connection;
B) move the connector away;
- undo the bolts fixing the control unit and
remove it.
When refitting the connector, proceed as fol-
lows:
- place the connector in contact with the con-
trol unit;
- rotate the metal hook until it is completely
closed.
NOE //
replacing the engine control unit,
connect the diagnostic equipment
(Examiner) to the diagnostic socket
and carry out the self-learning proce-
dure for the engine idle adjustment
actuator (M.D.S.), as described in the
"BUTTERFLY CASING"paragraph.
LAMBDA SENSOR
Removing - refitting
Disconnect the electrical connection (1) and
remove the sensor (2) from the housing on the
exhaust manifold.
When refitting, apply lubricating grease, resis-
tant to high temperatures, to the thread.
ENGINE RPM AND TDC SENSOR
Removing-refitting
Disconnect the electrical connection.
Undo the fixing bolt and remove the senor.
Checking the gap
Check the distance between the sensor and
the flywheel teeth (gap).
Gap: 0.5 - 1.5 mm
NOTE
If necessary, work on the sensor sup-
port (e.g. if the gap is outside of the
tolerance, the sensor is not aligned,
etc.); the procedure for correctly posi-
tioning the sensor and support and the
timing should be carried out following
the instructions given in the engine
overhaul manual.
54
Print n° 506.763/14