Ignition Coil
The 6 ignition coils are attached directly to the spark plugs and are located in the center of the camshaft carrier. The ignition coils are secured to the camshaft carrier with screws. Each ignition coil incorporates a 3 pin electrical connector for connection to the engine wiring harness.
Each ignition coil contains a primary and a secondary winding. A power stage in the primary winding allows the Powertrain Control Module (PCM) to control the primary current. The Powertrain Control Module (PCM) controls the spark timing and production by switching the power stage of each coil to ground. This method allows to the coil to charge up and then discharge at the appropriate time. This induces a high voltage in the secondary winding and thus the spark plug.
A diode in the ground side of the secondary winding reduces any undesirable switch-on voltage, to prevent misfiring into the combustion chamber. The diode limits the maximum voltage and current in the primary winding, to protect the power stage and limit the voltage in the secondary winding.
The PCM monitors the ignition coil control wires for faults and can store fault related Diagnostic Trouble Codes (DTCs). These DTCs can be retrieved using the Jaguar Land Rover (JLR) approved diagnostic equipment.