Fiat 1996 Brava Service Manual page 327

20v
98 range
P4A21LJ01
P4A21LJ02
P4A21LJ03
Copyright by Fiat Auto
Engine
Fuel system
10.
IGNITION COILS (0.221.504.014)
The ignition is the static advance eletronic
type with a single coil for each spark plug;
this solution eliminates the high tension cir­
cuit, increasing reliability and safety and de­
creasing the risk of interference due to high
tension leads and connections.
It involves a regular coil which raises the
voltage of the impulse sent to the spark
plugs: each individual coil, located in the
cylinder head, supplies a spark plug directly
without intermediate cables.
Checking ignition coil primary circuit resis­
tance
The resistance is checked by connecting an
ohmmeter to the connector external pins ( 1
and 3):
Primary winding resistance: 0.73 ohm
Electrical specifications
Primary winding inductance 2,5 mH
Primary winding resistance 0,73 Q
Anti-interference resistance 1 KQ
Diagram showing electrical connections
A. Control signal
X. Primary winding
Y. Secondary winding
1. Supply from ignition switch
2. Single coil
3. Electronic control unit
4. Spark plug
Wiring connector
The numbers in the boxes, connected to pin
1, indicate the corresponding control unit
pins arranged in the order of the cylinder
numbers.
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