Ignition Coils
There are 4 ignition coils installed directly to the spark plugs and they are located in the center of the camshaft carrier. The ignition coils are secured to the camshaft carrier with screws.
The ignition coils each have a 3 pin electrical connector. The 3 pin connector provides the following connections:
- A signal wire for the Powertrain Control Module (PCM) to operate the coil.
- A fused 12V power supply from the PCM relay. The PCM relay is located in the right Engine Junction Box (EJB).
- To a splice in the harness with a ground connection.
Each ignition coil contains a power stage which controls the primary current. The PCM controls the spark timing and production by switching the power stage of each ignition coil to ground. This method allows to the coil to charge up and then produce a spark at the spark plug at the appropriate time.
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 a Jaguar Land Rover (JLR) approved diagnostic equipment.