4.36.1 Description: Range/Performance

If the instrument pack detects a failure in the ambient air temperature sensor it will output a constant default value. The range/performance check monitors for a stuck signal at this default value for longer than a predefined period. When this occurs a failure is registered. If the problem occurs on two drive cycles then the MIL will illuminate.

Fig 1: Ambient Air Temperature (P0072, P0073)

Courtesy of JAGUAR CARS, INC.