Malfunction Indicator Lamp (MIL)
WARNING: This page is about a different car, the 2017 Jaguar XJ, 2016 Jaguar XJ, 2015 Jaguar XJ, 2014 Jaguar XJ, and 2013 Jaguar XJ. 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 HS CAN Powertrain 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.