Ignition Coils

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Four ignition coils are fitted directly to the spark plugs and are located in the center of the camshaft cover. The two inner coils for cylinders 2 and 3 are secured to the camshaft cover with screws and the two outer coils for cylinders 1 and 4 are secured with two studs and nuts.

The ignition coils are each connected to the ECM by a signal wire for the ECM to operate the coil. A second wire from the coil goes to a splice in the harness supplying the coil with a ground signal. The third connection on the coil is a fused 12V power supply from the ECM relay in the BJB.

Each coil contains a power stage which controls the primary current. The ECM controls the spark timing and production by switching the power stage of each coil to ground allowing the coil to charge up and then produce a spark at the spark plug at the appropriate time.

The coil has a resistance of 0.730 Ohms - 0.08 Ohms + 0.07 Ohms.