Note: On all engines of Fiat Punto, two ignition coils are used, with each coil supplying two cylinders. On SOHC (8-valve) engines, the coils can be removed individually, whereas on DOHC (16-valve) engines the coils are combined to form a single unit. The removal, testing and refitting procedures are the same for both types.

Removal

1 Remove the air cleaner assembly.
2 Disconnect the LT wiring plug(s) from the top of the ignition coil (see illustration).



Disconnect the ignition coil LT wiring plug(s)


3 Identify the HT leads for position then disconnect them from the coil HT terminals (see illustration).



Identity the HT leads for position then disconnect them from the coil terminals


4 Unscrew the mounting bolts and remove the relevant ignition coil of Fiat Punto from the end of the cylinder head (see illustrations).



Unscrew the mounting bolts.



... and remove the relevant ignition coil from the end of the cylinder head


Testing

5 Testing of the coil consists of using a multimeter set to its resistance function, to check the primary and secondary windings for continuity and resistance. Compare the results obtained to those given in the Specifications. Note the resistance of the coil windings varies slightly according to the coil temperature and the figures in the Specifications are values for the coil at 20°C.
6 Check that there is no continuity between the HT lead terminals and the coil body/mounting bracket of Fiat Punto.
7 Note that with the ignition switched on and the engine stationary, voltage wilt only be supplied to the ignition coils for approximately 2 seconds, However, when the engine is being cranked or running, voltage will be continually supplied.
8 If faulty, the coil should be renewed.

Refitting

9 Refitting is a reversal of the removal procedure ensuring that the wiring and HT leads are correctly reconnected.