Malfunction Indicator Lamp (MIL)
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.
Transmission related faults that effect the vehicle emissions output will illuminate the MIL (malfunction indicator lamp). The MIL is illuminated by the ECM (engine control module) on receipt of a relevant fault message from the TCM on the high speed CAN bus. The nature of the fault can be diagnosed using a Jaguar approved diagnostic system, which reads the fault codes stored in the TCM memory.