Marea-Marea Weekend®^
99 range
Engine
Fuel system
10.
Checking the resistance
The resistance of the solenoid valve can be
measured by disconnecting the connector and
connecting an ohmmeter as illustrated in the
diagram.
Resistance: 17.5-23.5 ohm at 20 C
Connector wiring
The numbers indicate the corresponding con-
trol unit pins.
CHECKS, ADJUSTMENTS AND REPAIR OPERATIONS ON THE BOSCH MOTRONIC ME 3.1
INJECTION/IGNITION SYSTEM IN ADDITION TO THE FAULT DIAGNOSIS
WHEN WORKING ON VEHICLES EQUIPPED WITH MOTRONIC INJECTION/IGNITION SYS-
TEMS, FOLLOW THESE PRECAUTIONS:
- do not start up the engine with the electrical connections not properly connected or the battery
terminals slack;
- do not use a rapid battery charger to start the engine;
- never disconnect the battery from the system with the engine running;
- to carry out the rapid charging of the battery, disconnect it first from the system;
- if the vehicle is going into a drying oven after painting, at temperatures in excess of 80 °C, the
injection I ignition electronic control unit must be removed first;
- do not connect or disconnect the electronic control unit multiple connector with the ignition
switch in the ON position;
- always disconnect the negative battery lead before carrying out electrical welding on the vehi-
cle.
It should be remembered that this system has a memory which is always supplied (stand-by
memory) which contains the self-adjustment values. Disconnecting the battery means that this
information will be lost and can only be acquired again after a certain length of time therefore this
operation should be carried out as infrequently as possible.
Copyright by Fiat Auto
37
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